Electronics Manufacturing Technical Articles

Electronics Manufacturing Technical Articles

Papers and articles related to SMT, PCB & EMS industry.


  • Reflow Ovens
  • Precision, fluid dispensing systems for low volume, high mix, R&D, and high volume 24x7 production
  • SMT Screen Printers.
  • Flexible pick & Place
  • Kyzen - PCB Cleaning

Add Article »

1143 SMT / PCB Assembly Related Technical Articles

Low Temperature Soldering Using SN-BI Alloys

Apr 01, 2020 | Morgana Ribas, Ph.D., Anil Kumar, Divya Kosuri, Raghu R. Rangaraju, Pritha Choudhury, Ph.D., Suresh Telu, Ph.D., Siuli Sarkar, Ph.D.

Low temperature solder alloys are preferred for the assembly of temperature-sensitive components and substrates. The alloys in this category are required to reflow between 170 and 200oC soldering temperatures. Lower soldering temperatures result in lower thermal stresses and defects, such as warping during assembly, and permit use of lower cost substrates. Sn-Bi alloys have lower melting temperatures, but some of its performance drawbacks can be seen as deterrent for its use in electronics devices.</p><p>Here we show that non-eutectic Sn-Bi alloys can be used to improve these properties and further align them with the electronics industry specific needs. The physical properties and drop shock performance of various alloys are evaluated, and their results are analysed in terms of the alloy composition, including Bi content and alloying additions....

Publisher: Alpha Assembly Solutions

Alpha Assembly Solutions

Alpha Assembly Solutions is a world leader in the development, manufacturing, and sales of innovative materials used in the assembly electronics, industrial joining and Photo Voltaic market places.

South Plainfield, New Jersey, USA

Manufacturer of Assembly Material

Product Design and Early Manufacturing Involvement

Apr 01, 2020 | ACI Technologies, Inc.

It happens much too often; manufacturing engineers are brought into a NEW product design phase at the very end of a design and are asked to provide input that should have been provided much earlier. One needs to understand how the circuit board design and quality of the manufacturing process not only effects assembly yield and product reliability, but how it could also affect the results of any testing that is done to circuit packs during prototyping. It is important that any circuit pack (including prototypes) that will be used in reliability, performance and functional testing be designed with the proper features and assembled with a manufacturing process that has been developed to produce a high-quality assembly. If not, the results of any testing might not represent the actual characteristics of the design and provide miss-guidance to future changes....

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

1Click SMT Made Successful Installation and Training For Thai Customer!

Apr 01, 2020 | 1Clicksmt

Recently, our engineer Peter went to Thailand to provide after-sales support for our customer. In these days, we had installed a SC-900 selective coating line . Moreover, Peter gave patience and meticulous training to their staff, make sure they master the machine usage .Customer and agent are satisfied with our support and give their affirmation to us. SC-900 is a high Performance 4 axis Selective Coating Machine ,which is equipped with high precision servo control system , various valves , CCD system ,material tank weight detecting system etc, which can provide a high efficiency conformal coating process .The maximum coating size can reach 400mm*450mm with SC-900. So far, we've installed several dozen conformal coating line all over the world. It have excellent stability and performance. Check below link to get more info!...

Publisher: 1 CLICK SMT TECHNOLOGY CO., Limited

1 CLICK SMT TECHNOLOGY CO., Limited

Manufacturer of selective soldering machine, soldering robot, reflow oven, wave solder machine, pcb handling machine. Distributing for Turnkey line include SMT line, conformal coating lines, through hole line.

Dongguan City, China

Manufacturer of Assembly Equipment, Screen Printing, Turnkey, Distributor, Selective Soldering

New High-Speed 3D Surface Imaging Technology in Electronics Manufacturing Applications

Mar 26, 2020 | Juha Saily

This paper introduces line confocal technology that was recently developed to characterize 3D features of various surface and material types at sub-micron resolution. It enables automatic microtopographic 3D imaging of challenging objects that are difficult or impossible to scan with traditional methods, such as machine vision or laser triangulation.<p><p>Examples of well-suited applications for line confocal technology include glossy, mirror-like, transparent and multi-layered surfaces made of metals (connector pins, conductor traces, solder bumps etc.), polymers (adhesives, enclosures, coatings, etc.), ceramics (components, substrates, etc.) and glass (display panels, etc.). Line confocal sensors operate at high speed and can be used to scan fast-moving surfaces in real-time as well as stationary product samples in the laboratory. The operational principle of the line confocal method and its strengths and limitations are discussed.</p><p>Three metrology applications for the technology in electronics product manufacturing are examined: 1. 3D imaging of etched PCBs for micro-etched copper surface roughness and cross-sectional profile and width of etched traces/pads. 2. Thickness, width and surface roughness measurement of conductive ink features and substrates in printed electronics applications. 3. 3D imaging of adhesive dots and lines for shape, dimensions and volume in PCB and product assembly applications....

Publisher: FocalSpec, Inc.

FocalSpec, Inc.

Offers bare sensors for system integration, offline benchtop tools and online scanners for metrology and inspection applications.

Santa Clara, California, USA

Inspection

DA-1200 THT automated inspection system service report

Mar 24, 2020 | 1clicksmt

Installing time : November 24 to December 2 ,2019 Participants: Customer from (Elaraby , Egypt) Service engineer:Peter (1 Click SMT)...

Publisher: 1 CLICK SMT TECHNOLOGY CO., Limited

1 CLICK SMT TECHNOLOGY CO., Limited

Manufacturer of selective soldering machine, soldering robot, reflow oven, wave solder machine, pcb handling machine. Distributing for Turnkey line include SMT line, conformal coating lines, through hole line.

Dongguan City, China

Manufacturer of Assembly Equipment, Screen Printing, Turnkey, Distributor, Selective Soldering

Robust Reliability Testing For Drop-on-Demand Jet Printing

Mar 19, 2020 | Gustaf Mårtensson, Patrik Mirzai

In this study, the question was how to perform statistically reliable robust- ness tests for the non-contact drop-on-demand printing of functional fluids, such as solder paste and conductive adhesives. The goal of this study was to develop a general method for hypothesis testing when robustness tests are performed. The main problem was to determine if there was a statistical difference between two means or proportions of jet printing devices. In this study, an example of jetting quality variation was used when comparing two jet printing ejector types that differ slightly in design. We wanted to understand if the difference in ejector design can impact jetting quality by performing robustness tests. and thus answer the question, "Can jetting differences be seen between ejector design 1 and design 2"?...

Publisher: Mycronic Technologies AB

Mycronic Technologies AB

Mycronic, formerly MYDATA, is the key manufacturer of assembly machine for electronics. Our product portfolio contains Pick&Place machines, Jet-printing machines and component storage towers.

Täby, STOCKHOLM, Sweden

Manufacturer of Assembly Equipment, Assembly, OEM

IPC Apex Expo 2020 Remarks

Mar 12, 2020 | Roland Girouard

IPC's APEX EXPO is always exciting & always fun and, most importantly, always beneficial to those who exhibit and attend. From technical conferences to standards committees to new and exciting things on the show floor - APEX 2020 was indeed a success...

Publisher: SMTnet

SMTnet

Helping businesses find each other.

Portland, Maine, USA

Other, Consultant, Marketing Agency, Publication or Online Resource, Service Provider

Filling of Microvias and Through Holes by Electrolytic Copper Plating –Current Status and Future Outlook

Mar 12, 2020 | Mustafa Özkök, Sven Lamprecht, Akif Özkök, Dolly Akingbohungbe, Moody Dreiza - Atotech Deutschland GmbH, Alex Stepinski - GreenSource Fabrication LLC

The electronics industry is further progressing in terms of smaller, faster, smarter and more efficient electronic devices. This continuous evolving environment caused the development on various electrolytic copper processes for different applications over the past several decades. (...) This paper describes the reasons for development and a roadmap of dimensions for copper filled through holes, microvias and other copper plated structures on PCBs....

Publisher: Atotech

Atotech

One of the world's leading suppliers of integrated production systems, chemistry, equipment, know-how and service for electroplating, semiconductor and printed circuit board manufacturing.

Berlin, Germany

Manufacturer of Assembly Material, Manufacturer of Components, Components / Substrates

Cleaning No-Clean Fluxes Prior to Conformal Coating

Mar 09, 2020 | ACI Technologies, Inc.

A customer called the Helpline seeking advice for cleaning no-clean fluxes prior to applying a conformal coating. The customer's assemblies were manufactured with a no-clean rosin based solder paste (ROL0) and were cleaned with an isopropyl alcohol (IPA) wash. After cleaning, a white residue was sometimes found in areas with high paste concentrations and was interfering with the adhesion of the conformal coating (Figure 1). For conformal coatings to adhere properly, the printed circuit board (PCB) surface must be clean of fluxes and other residues. In addition, ionic contamination left by flux residues can lead to corrosion and dendrite growth, two common causes of electronic opens and shorts. Other residues can lead to unwanted impedance and physical interference with moving parts....

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

Lubrication Grease Selection Guide

Mar 08, 2020 | Mike Sondalini

Lubrication Grease, use the right one for the job. Insight into lubrication classification. selection and application of greases. Compare the properties of greases and check those used in your equipment that are suited to the service....

Publisher: Business Industrial Network

Business Industrial Network

Offers training software and videos. Also, on-site training that qualify for CEUs to maintenance, engineering, and management professionals.

Las Vegas, Nevada, USA

Consultant, Publication or Online Resource, Service Provider, Software Manufacturer, Training Provider

Maintenance Policies and Procedures

Mar 08, 2020 | Larry Bush

A sample for Larry Bush's Maintenance Policies and Procedures - 2nd Edition (A 415-page book in PDF format. Those who purchase also receive 150 support files in editable format to customize and use as samples and templates.)...

Publisher: Business Industrial Network

Business Industrial Network

Offers training software and videos. Also, on-site training that qualify for CEUs to maintenance, engineering, and management professionals.

Las Vegas, Nevada, USA

Consultant, Publication or Online Resource, Service Provider, Software Manufacturer, Training Provider

IoT for Real-Time Measurement of High-Throughput Liquid Dispensing in Laboratory Environments

Mar 04, 2020 | Justin Shumate, Pierre Baillargeon, Timothy P. Spicer, and Louis Scampavia

Critical to maintaining quality control in high-throughput screening is the need for constant monitoring of liquid-dispensing fidelity. Traditional methods involve operator intervention with gravimetric analysis to monitor the gross accuracy of full plate dispenses, visual verification of contents, or dedicated weigh stations on screening platforms that introduce potential bottlenecks and increase the plate-processing cycle time.</p> <p>We present a unique solution using open-source hardware, software, and 3D printing to automate dispenser accuracy determination by providing real-time dispense weight measurements via a network-connected precision balance. This system uses an Arduino microcontroller to connect a precision balance to a local network. By integrating the precision balance as an Internet of Things (IoT) device, it gains the ability to provide real-time gravimetric summaries of dispensing, generate timely alerts when problems are detected, and capture historical dispensing data for future analysis. All collected data can then be accessed via a web interface for reviewing alerts and dispensing information in real time or remotely for timely intervention of dispense errors. The development of this system also leveraged 3D printing to rapidly prototype sensor brackets, mounting solutions, and component enclosures....

Publisher: SLAS Technology

SLAS Technology

SLAS Technology is a peer-reviewed scientific journal published by the Society for Laboratory Automation and Screening in partnership with SAGE Publications

Thousand Oaks, California, USA

Publication or Online Resource

Through-Hole Soldering Defects And The Solutions

Mar 01, 2020 | Will Bai, CTO in 1CLICK SMT

For though hole soldering, no matter it's wave soldering or selective soldering, the process is same formed by fluxing,preheating,soldering. How these 3 process will change the soldering result? When you face the soldering defects, what could be the reasons caused these and how to debug them? With below information you may get some hints....

Publisher: 1 CLICK SMT TECHNOLOGY CO., Limited

1 CLICK SMT TECHNOLOGY CO., Limited

Manufacturer of selective soldering machine, soldering robot, reflow oven, wave solder machine, pcb handling machine. Distributing for Turnkey line include SMT line, conformal coating lines, through hole line.

Dongguan City, China

Manufacturer of Assembly Equipment, Screen Printing, Turnkey, Distributor, Selective Soldering

Dispensing EMI Shielding Materials: An Alternative to Sputtering

Feb 26, 2020 | Garrett Wong, Jinu Choi

Shielding electronic systems against electromagnetic interference (EMI) has become a hot topic. Technological advancements toward 5G standards, wireless charging of mobile electronics, in-package antenna integration, and system-inpackage (SiP) adoption are driving the need to apply more effective EMI shielding and isolation to component packages and larger modules. For conformal shielding, EMI shielding materials for exterior package surfaces have mostly been applied with a physical vapor deposition (PVD) process of sputtering, leveraging front-end packaging technologies to back-end packaging applications. However, sputtering technology challenges in scalability and cost along with advancements in dispensable materials are driving considerations for alternative dispensing techniques for EMI shielding....

Publisher: Nordson ASYMTEK

Nordson ASYMTEK

A leader in automated fluid dispensing, jetting and conformal coating. Products range from benchtop dispensers and stand-alone dispensing workstations to fully automated, in-line conveyorized systems.

Carlsbad, California, USA

Manufacturer of Assembly Equipment, Adhesives / Dispensing, Assembly, Component Packaging

Coat-and-Print Patterning of Silver Nanowires for Flexible and Transparent Electronics

Feb 19, 2020 | Weiwei Li, Azat Meredov, Atif Shamim

Silver nanowires (Ag NWs) possess excellent optoelectronic properties, which have led to many technology-focused applications of transparent and flexible electronics. Many of these applications require patterning of Ag NWs into desired shapes, for which mask-based and printing-based techniques have been developed and widely used. However, there are still several limitations associated to these techniques. These limitations, such as complicated patterning procedures, limited patterning area, and compromised optical transparency, hamper the efficient fabrication of high-performance Ag NW patterns. Here, we propose a coat-and-print approach for effectively patterning Ag NWs....

Publisher: Integrated Microwave Packaging Antennas and Circuits Technology (IMPACT) Lab

Integrated Microwave Packaging Antennas and Circuits Technology (IMPACT) Lab

IMPACT lab is focused on cutting-edge research in innovative antenna designs, RF circuits, and sensors.

Thuwal, Saudi Arabia

Research Institute / Laboratory

Selective protection for PCBs

Feb 18, 2020 | Scheugenpflug

Glob Top, Dam and Fill & Flit Chip Underfill To protect PCBs from damaging outside influences, they are coated with a thin layer of casting resin or protective finish during the conformal coating process. In addition to sealing the entire circuit board, it is possible to pot only sections or individual components on the substrate. Different methods ranging from "glob top" to "dam and fill" and "flip chip underfill" have been developed for this purpose....

Publisher: Scheugenpflug Inc.

Scheugenpflug Inc.

Specializes in automated metering & dispensing solutions, supplier of resin metering systems, global expert in production and process automation, vacuum dispensing production systems, and systems for dispensing of abrasive media.

Kennesaw, Georgia, USA

Manufacturer of Assembly Equipment, Adhesives / Dispensing, Assembly, Component Preparation

Process Engineering - Why is preparation of adhesive bonding and potting materials necessary?

Feb 14, 2020 | Scheugenpflug

To meet the steady increase in technical requirements for electronic components, potting media properties must be extremely precise. Rheology, viscosity, filler content and curing behavior are only a few of the factors that play a role in their practical use. However, the growing complexity of materials often negatively impacts the ability to process or dispense them. In this case, material preparation and feeding systems specially designed for this purpose are required. These systems optimally prepare the material for the actual application and ensure homogeneous feeding to the dispensing system....

Publisher: Scheugenpflug Inc.

Scheugenpflug Inc.

Specializes in automated metering & dispensing solutions, supplier of resin metering systems, global expert in production and process automation, vacuum dispensing production systems, and systems for dispensing of abrasive media.

Kennesaw, Georgia, USA

Manufacturer of Assembly Equipment, Adhesives / Dispensing, Assembly, Component Preparation

How to achieve optimum results in automated dispensing

Feb 13, 2020 | Scheugenpflug

Efficient bonding, sealing and potting has a major influence on the sustainable function and safety of electronic components. The key to success here lies in the comprehensive view and control of process engineering. Here it pays to seek collaboration with the systems and the material manufacturer during the very early stages of the project. This is because dispensing systems must be selected for compatibility with the workpiece and the adhesive, sealant or potting compound used. And there are also other factors that play an important role in designing the optimum dispensing system:...

Publisher: Scheugenpflug Inc.

Scheugenpflug Inc.

Specializes in automated metering & dispensing solutions, supplier of resin metering systems, global expert in production and process automation, vacuum dispensing production systems, and systems for dispensing of abrasive media.

Kennesaw, Georgia, USA

Manufacturer of Assembly Equipment, Adhesives / Dispensing, Assembly, Component Preparation

Size Matters - The Effects of Solder Powder Size on Solder Paste Performance

Feb 12, 2020 | Tony Lentz

Solder powder size is a popular topic in the electronics industry due to the continuing trend of miniaturization of electronics. The question commonly asked is “when should we switch from Type 3 to a smaller solder powder?” Solder powder size is usually chosen based on the printing requirements for the solder paste. It is common practice to use IPC Type 4 or 5 solder powders for stencil designs that include area ratios below the recommended IPC limit of 0.66. The effects of solder powder size on printability of solder paste have been well documented.</p><p>The size of the solder powder affects the performance of the solder paste in other ways. Shelf life, stencil life, reflow performance, voiding behavior, and reactivity / stability are all affected by solder powder size. Testing was conducted to measure each of these solder paste performance attributes for IPC Type 3, Type 4, Type 5 and Type 6 SAC305 solder powders in both water soluble and no clean solder pastes. The performance data for each size of solder powder in each solder paste flux was quantified and summarized. Guidance for choosing the optimal size of solder powder is given based on the results of this study....

Publisher: FCT ASSEMBLY, INC.

FCT ASSEMBLY, INC.

With numerous facilities in the United States, we are one of the electronics industry's leading manufacturers of lead-free solder products, superior quality stencils, and precision cut parts.

Greeley, Colorado, USA

Manufacturer of Assembly Material, Soldering

Accurately Capturing System-Level Failure of Solder Joints

Feb 05, 2020 | Maxim Serebreni

Consortium Projects - Thermal Cycling Reliability</p> <ul> <li>Consortium projects allow for joint research to investigate the reliability of multiple solder alloys under a variety of environmental stress conditions. </li> <li>Project jointly sponsored by iNEMI and HDP User Group and including CALCE and Universal consortium currently assessing 15 third-generation solder alloys..</li> </ul>...

Publisher: DfR Solutions

DfR Solutions

DfR Solutions has world-renowned expertise in applying the science of Reliability Physics to electrical and electronics technologies, and is a leading provider of quality, reliability, and durability (QRD) research and consulting for the electronics industry.

College Park, Maryland, USA

Service Provider

Mechanical Drop Shock Testing

Feb 03, 2020 | ACI Technologies, Inc.

Accurate impact testing is a key component to establishing that a product is not only reliable, but durable in an end-use environment. ACI Technologies tested a high-g circuit board to demonstrate component durability and ruggedization for guided munitions. The Lansmont Model 23 Shock Test System customized with a Dual Mass Shock Amplifier was used for this testing (Figure 1)....

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

Key Advances in Void Reduction in the Reflow Process Using Multi-Stage Controlled Vacuum

Jan 28, 2020 | Heller Industries

This paper explores new advances in the reflow soldering process including vacuum technology and warpage mitigation systems. The first topic for discussion will be the implementation of a vacuum process directly in a conventional inline soldering system. The second topic presented is the mitigation of warpage on substrates or wafers....

Publisher: Heller Industries Inc.

Heller Industries Inc.

Reflow ovens for automated SMT PCB assembly, specializing in lead free processing and nitrogen reflow. The best convection reflow ovens on the market.

Florham Park, New Jersey, USA

Manufacturer of Assembly Equipment, Soldering, OEM

Analysis of Inspection of DPA Test Requirements Applied To Flip Chip Technologies

Jan 22, 2020 | Gonzalo Fernandez, Ana Collado

Flip chip assembly techniques bring a wide range of benefits:</p> <ul> <li>Reduced parasitic interconnection between the semiconductor die and package.</li> <li>Provides a high final assembly integrity density.</li> <li>Minimize the interconnection length, providing better electrical performances, especially for high speed signals.</li> <li>Reduce the device size and weight,…, etc.</li> </ul> <p>But there is no dedicated inspection requirements nor DPA standard which address all the necessary aspects associated to this construction type or only cover partially the topics to be inspected....

Publisher: ALTER TECHNOLOGY

ALTER TECHNOLOGY

A leading company in the fields of engineering, procurement and testing of high reliability components and electronic equipment within the space and other high reliability markets.

41092, Spain

Test Services

Ultra-Thin Chips For High-Performance Flexible Electronics

Jan 15, 2020 | Shoubhik Gupta, William Taube Navaraj, Leandro Lorenzelli, Ravinder Dahiya

Flexible electronics has significantly advanced over the last few years, as devices and circuits from nanoscale structures to printed thin films have started to appear. Simultaneously, the demand for high-performance electronics has also increased because flexible and compact integrated circuits are needed to obtain fully flexible electronic systems. It is challenging to obtain flexible and compact integrated circuits as the silicon based CMOS electronics, which is currently the industry standard for high-performance, is planar and the brittle nature of silicon makes bendability difficult. For this reason, the ultra-thin chips from silicon is gaining interest. This review provides an in-depth analysis of various approaches for obtaining ultra-thin chips from rigid silicon wafer. The comprehensive study presented here includes analysis of ultra-thin chips properties such as the electrical, thermal, optical and mechanical properties, stress modelling, and packaging techniques. The underpinning advances in areas such as sensing, computing, data storage, and energy have been discussed along with several emerging applications (e.g., wearable systems, m-Health, smart cities and Internet of Things etc.) they will enable. This paper is targeted to the readers working in the field of integrated circuits on thin and bendable silicon; but it can be of broad interest to everyone working in the field of flexible electronics....

Publisher: Bendable Electronics and Sensing Technologies (BEST)

Bendable Electronics and Sensing Technologies (BEST)

Our research revolves around the development of high-performance electronics and sensing systems on large area flexible substrates.

Glasgow, Scotland

School

Atomic Layer Deposition

Jan 13, 2020 | ACI Technologies, Inc.

Is it possible to coat electronic assemblies with a thin, uniform in thickness, pinhole-free, moisture impervious, truly hermetic (by the MIL-STD-883 definition) film of ceramic material that is far more affordable than placing the same electronic assemblies in the currently used glass-to-metal sealed, thick, heavy, metal-and-ceramic-based hermetic enclosures? Since the coating (called a “conformal coating”) would be both hermetic (moisture proof) and hundreds or thousands of times thinner than the currently used enclosures, it would be both less expensive, lighter, and still just as effective in excluding moisture (hermetic) as the current heavy, bulky, expensive electronic enclosures are....

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

Copper/Epoxy Joints in Printed Circuit Boards: Manufacturing and Interfacial Failure Mechanisms

Jan 09, 2020 | Philipp Nothdurft, Gisbert Riess, Wolfgang Kern

PCBs have a wide range of applications in electronics where they are used for electric signal transfer. For a multilayer build-up, thin copper foils are alternated with epoxy-based prepregs and laminated to each other. Adhesion between copper and epoxy composites is achieved by technologies based on mechanical interlocking or chemical bonding, however for future development, the understanding of failure mechanisms between these materials is of high importance. In literature, various interfacial failures are reported which lead to adhesion loss between copper and epoxy resins. This review aims to give an overview on common coupling technologies and possible failure mechanisms. The information reviewed can in turn lead to the development of new strategies, enhancing the adhesion strength of copper/epoxy joints and, therefore, establishing a basis for future PCB manufacturing....

Publisher: Polymer Competence Center Leoben GmbH

Polymer Competence Center Leoben GmbH

PCCL is the leading Austrian "Center of Excellence" for cooperative research in the area of polymer engineering and sciences.

Leoben, Austria

Research Institute / Laboratory

Using mini PCB magazine loader to save more space for your SMT assembly line

Jan 06, 2020 | ASCEN technology company

ASCEN technology make the mini PCB magazine loader without magazine rack to save more space for most of production line,PCB mini loader can use as the PCB unloader or loading machine in different station and let the factory maximized to using the space...

Publisher: ASCEN Technology

ASCEN Technology

Manufacturer of automated production systems;PCB magazine loader,PCB separator,PCB cutting machine,PCB unloaders, PCB conveyors,PCB depaneling machines,PCB turn conveyors,PCB conformal coaters,PCB solder paste printer,PCB buffer

Dongguan, Guangdong, China

Manufacturer of Assembly Equipment, Screen Printing, OEM, Manufacturer of Test Equipment, Selective Soldering

Counterfeit Component Analysis

Jan 02, 2020 | ACI Technologies, Inc.

A customer contacted the Helpline with the concern that parts being used in their assembly may possibly be counterfeit components. The counterfeiting of electronics components is a world-wide problem, and the threat today is even more evident than ever before. Any company, large or small, that manufactures assemblies using electronics components is equally susceptible to using counterfeit devices in their assemblies. In most cases, counterfeit components aren’t discovered until after the component has already been placed on a printed circuit board (PCB), usually during first article electrical test. At this point, the only recourse is to debug the circuit to determine the faulty component and rework each PCB already in production to replace the faulty component. As one might easily surmise, this is a rather costly process; world-wide, counterfeit components account for over $15B loss in sales annually! ...

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

Temperature Cycling and Fatigue in Electronics

Jan 01, 2020 | Gilad Sharon, Ph.D., Greg Caswell

The majority of electronic failures occur due to thermally induced stresses and strains caused by excessive differences in coefficients of thermal expansion (CTE) across materials.</p><p>CTE mismatches occur in both 1st and 2nd level interconnects in electronics assemblies. 1st level interconnects connect the die to a substrate. This substrate can be underfilled so there are both global and local CTE mismatches to consider. 2nd level interconnects connect the substrate, or package, to the printed circuit board (PCB). This would be considered a "board level" CTE mismatch. Several stress and strain mitigation techniques exist including the use of conformal coating....

Publisher: DfR Solutions

DfR Solutions

DfR Solutions has world-renowned expertise in applying the science of Reliability Physics to electrical and electronics technologies, and is a leading provider of quality, reliability, and durability (QRD) research and consulting for the electronics industry.

College Park, Maryland, USA

Service Provider

PCBONLINE rigid capability

Dec 30, 2019 | Ada

(ROHS, Halogen Free & Reach Compliance) FR-4 (Tg130-180): ShengYi, ITEQ, KB, Huazheng High Speed FR4, Ceramics & Telflon, Rogers...

Publisher: PCB ONLINE LIMITED

How to choose the material of PCB ?

Dec 30, 2019 | Ada

How to choose the material of PCB ? The choice of PCB material must meet the design requirements, the quality of production and cost need to achieve a balance. The design requirements include electrical and institutional parts. This material problem is usually important when designing very high speed PCB boards (frequencies greater than GHz). For example, the commonly used FR-4 material may not be used when dielectric loss at several GHz frequencies, which can have a significant effect on signal attenuation . In the case of electrical, it is important to note whether the dielectric constant and the dielectric loss are combined at the designed frequency...

Publisher: PCB ONLINE LIMITED

A Life Prediction Model of Multilayered PTH Based on Fatigue Mechanism

Dec 26, 2019 | Yaqiu Li, Weiwei Hu, Yufeng Sun, Zili Wang, Ali Mosleh

Plated through hole (PTH) plays a critical role in printed circuit board (PCB) reliability. Thermal fatigue deformation of the PTH material is regarded as the primary factor affecting the lifetime of electrical devices. Numerous research efforts have focused on the failure mechanism model of PTH. However, most of the existing models were based on the one-dimensional structure hypothesis without taking the multilayered structure and external pad into consideration.</p><p>In this paper, the constitutive relation of multilayered PTH is developed to establish the stress equation, and finite element analysis (FEA) is performed to locate the maximum stress and simulate the influence of the material properties. Finally, thermal cycle tests are conducted to verify the accuracy of the life prediction results. This model could be used in fatigue failure portable diagnosis and for life prediction of multilayered PCB....

Publisher: Beihang University

Beihang University

Beihang University, previously known as Beijing University of Aeronautics and Astronautics is a major public research university located in Beijing, China, emphasizing engineering, technology, and the hard sciences.

Beijing, China

School

Critical Evaluation of Laboratory Potentiometric Electronic Tongues for Pharmaceutical Analysis - An Overview

Dec 18, 2019 | Małgorzata Łabańska, Patrycja Ciosek-Skibińska, Wojciech Wróblewski

Electronic tongue systems equipped with cross-sensitive potentiometric sensors have been applied to pharmaceutical analysis, due to the possibility of various applications and developing new formulations. Many studies already proved the complementarity between the electronic tongue and classical analysis such as dissolution tests indicated by Pharmacopeias. However, as a new approach to study pharmaceuticals, electronic tongues lack strict testing protocols and specification limits; therefore, their results can be improperly interpreted and inconsistent with the reference studies. Therefore, all aspects of the development, measurement conditions, data analysis, and interpretation of electronic tongue results were discussed in this overview. The critical evaluation of the effectiveness and reliability of constructed devices may be helpful for a better understanding of electronic tongue systems development and for providing strict testing protocols....

Publisher: Warsaw University of Technology

Warsaw University of Technology

WUT is a research intense, doctoral level academic institution focused on undergraduate and graduate programs almost exclusively in engineering and applied sciences.

Warsaw, Poland

School

Factors determine the price of temperature humidity test chamber

Dec 16, 2019 | climatest symor

When we were children,our parents always warn us "Do comparison shopping before you buy",why they say like this?this is a very simple truth, for the first deal,we are always cautious, through continuous comparison in order to find out the best quality, service, after-sale and price. This apply to any industry,there are many manufacturers of environmental test equipment. When some customers inquire a temeprature humidity test chamber, they will find a very common problem. Why is the price of the same equipment quoted by the two manufacturers very different? 1, the chamber body process,which effects the exterior case quality,this price has a gap. 2, the components, esp.components of the refrigeration system, is the core value of the temperature humidity test chamber. 3, even if the body and refrigeration components are the same, some prices are different, that is the manufacturer technical level. 4, regional issues, Wuxi,Changzhou, Dongguan, these brands need to know more. 5. after-sales, a powerful manufacturer often with a sound after-sales service dept.. The above are both technical and service, as well as the delivery cost of goods to the local and overseas are different....

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Difference between Neutral and Acid Salt Spray Corrosion Test

Dec 13, 2019 | climatest symor

Salt spray corrosion chamber can test the ability of material and its protective layer to resist salt mist corrosion, or compare the process quality of similar protective layers, at the same time; this equipment is suitable for parts, electronic components, protective layer of metal material and other industrial products. Salt spray test is divided into neutral and acid test. What is the difference between neutral and acid in salt spray test? First, the temperature applied in the test method is different: Neutral test: a. Laboratory:35°C ±1°C, b. Saturated air drums:47°C ±1°C Acid test: a. Laboratory:50°C ±1°C, b. Saturated air drums:63°C ±1°C Second, the production material is different,neutral test chamber adoptes the traditional PVC plates, acid test chamber asopts PP sheet,which is more high temperature resistance and suits strong acid test. Third. Different test methods satisfied Neutral salt spray chamber according to GB/T 2423.17-2008, GB/T 2423.18-2000< basic rules for electrical and electronic products test Ka >, salt spray test method and GB/T 10125-1997, GB/T 10587-2006, GB10593.2-1990, GB/T 1765-1979, GB/T 1771-2007, GB/T 12967.388, GB/T 1705.8-2008, etc. In addition to the test methods specified in the national standard, acid salt spray chamber also needs to expand the standard setting such as IEC,MIL,DIN,ASTM,IS,CNS. Last, Comparison of neutral test solutions China: NaCI distilled water solution NaCI mass concentration (50 ±5) g ≤ l pH value 6.5 ≤ 7.2 United States: distilled water solution NaCI mass concentration 5% ±1% pH value 6.5 ≤ 7.2 Germany: NaCI distilled water solution NaCI mass concentration (50 ±5) g ≤ l pH value 6.5 ≤ 7.2 Japan: NaCI distilled water solution NaCI mass concentration 5% ±1% pH pH value 6.5 ~ 7.2 France: NaCI distilled water solution NaCI mass concentration 5% pH 6.5 ≤ 7.2 http://climatechambers.com/articles&latestnews/difference-between-neutral-and-acid-salt-spray-corrosion-test.html...

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Voids in Solder Joints

Dec 12, 2019 | Raiyo Aspandiar

Presented at SMTA Boise Expo and Tech Forum, March 20, 2018...

Publisher: Intel Corporation

Intel Corporation

Intel designs and builds the essential technologies that serve as the foundation for the world's computing devices.

Santa Clara, California, USA

Manufacturer of Components

What causes temperature humidity chamber to alarm?

Dec 12, 2019 | climatest symor

Today we discuss the reason that causes temperature humidity chamber to alarm,In most cases, the equipment alarm is caused by the improper operation in the process of use, which mainly includes following reasons:that are refrigeration system, temperature system and circulating system. First, Refrigeration system 1, refrigeration compressor overpressure alarm. If the refrigerant pressure exceeds the set value, it will stop and alarm at the same time. At this time, the fault must be eliminated and then manually reset. 2, short phase power supply, phase sequence alarm. When the external power supply of the equipment is out of phase or the phase sequence is changed, it will stop and alarm at the same time. 3. The circulating cooling water is short of water to alarm. When the water pressure of the cooling circulating water system is insufficient, it will stop and alarm at the same time, and it must wait for the fault to be eliminated and reset at the same time before it could run normally. 4, refrigeration compressor overheating alarm. When the coil of the compressor is overheated and the power supply of the line is not normal, it will stop and alarm at the same time. Second, Temperature system 1, the overtemperature alarm in the chamber. The sensors in the channel and the sample area are equipped with overtemperature protection devices, and there are also overtemperature protecter on the control panel. When the temperature in the working chamber exceeds the setting value on the controller, it will stop and alarm. 2. sample overtemperature protection. When the temperature in the sample area exceeds the protection temperature set by the controller, it will stop and alarm at the same time. The overtemperature protection of the sample is divided into upper limit protection and lower limit protection, which can be set according to the demand, Third,Circulating system 1. The alarm is caused by the overheating of the circulating fan. When the coil of the fan is over-heated, the alarm will be stopped at the same time. 2. The fan over-current alarm. When the current of the fan exceeds the allowable value, the alarm is stopped at the same time, and the normal operation can only be carried out after the fault maintenance of the overcurrent is completed. This is what we talk about today,if you have more questions,let us know....

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Masking for Conformal Coatings

Dec 05, 2019 | ACI Technologies

Conformal coatings are regularly employed to protect the surface of a soldered printed circuit board assembly from moisture, chemicals in the PCBA's service environment, and foreign objects or debris. Conformal coatings are nonconductive and therefore cannot be placed on any location where electrical contact will be required, such as connector pins, test points, and sockets. Conformal coatings are also not permitted on any mechanical interface location, such as mounting holes or brackets, to assure the proper fit between items in the final assembly. In order to apply conformal coatings to an assembly and comply with the restrictions on keep-out areas, masking is employed to protect those surfaces. ...

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

Key Technology Choices For Optimal Massive IoT Devices

Nov 26, 2019 | Claes Lundqvist, Ari Keranen, Ben Smeets, John Fornehed, Carlos, R.B. Azevedo, Peter Von Wrycza

The latest cellular communication technologies LTE-M and NB-IoT enable the introduction of a new generation of IoT devices that deliver on the promise of scalable, cost-effective massive IoT applications using LPWAN technology. However, a few key technology choices are necessary to create IoT devices that can support the multitude of existing and emerging massive IoT use cases.....

Publisher: Ericsson AB

Ericsson AB

Ericsson AB manufactures and markets radio and television communication equipment. The company was formerly known as Ericsson Radio Systems AB. Ericsson AB (Sweden) operates as a subsidiary of Ericsson.

Stockholm, Sweden

Other

Why salt spray chamber fail to spray salt mist?

Nov 20, 2019 | climatest symor

Salt spray test chamber is used to test teh salt corrosion resistance ability of hardware, metal and other auto parts,the chamber can quickly detect the corrosion resistance degree of products in the temperature, humidity and salt spraying environment, which can effectively improve production efficiency. So what is the reason why such a salt spray test chamber does not spray? As per our past maintenance experience,there are below reasons,customers can have a look,hope it is helpful: 1, the spray tower is blocked; 2, water pipes clogged, water flow can not go in; 3, the air compressor stops running,pls open the air compressor button; 4, main switch of the air compressor outlet is not turned on,pls turn on. 5, the solenoid valve fails, the pressure meter is broken or the pressure is too low, pls check with Climatest and repair it. 6, when the nozzle is clogged, the nozzle should be carefully removed and cleaned,because it is fragile. 7, if the spray pressure is normal, the position of the nozzle glass is also correct, but what is the reason for not spraying? In this case, it is necessary to carefully observe whether there is dirt at the contact surface of the nozzle. If so, clean up the dirt and the spray can be carried out normally. That‘s all we‘re going to talk about today. If you have any questions, follow us on facebook, Please feel free to ask us questions....

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

5G - The Future of IoT

Nov 20, 2019 | 5g Americas

5G: The Future of IoT takes a look at the market drivers, trends and cellular technology solutions that will create our connected future.</p><p> Market drivers provide added value through connectivity of all “things” ranging from street lighting to home appliances to industrial robotics. Providing connectivity to things has become easier with improvements in the economics of end devices, large investments in IoT systems, adoption of global standards and availability of spectrum. Overall trends in information technology such as cloud computing and edge cloud, artificial intelligence and security assurance have accelerated the IoT ecosystem. The whitepaper discusses some of the market segments in more details, including industrial IoT, smart cities, enterprise IoT and consumer IoT....

Publisher: 5G Americas

5G Americas

5G Americas advocates for and facilitates the advancement of 5G and the transformation of LTE networks throughout the Americas.

Bellevue, Washington, USA

Association / Non-Profit

Maintenance and operation of walk-in temperature humidity test chamber

Nov 17, 2019 | climatest symor

Overview of walk-in temperature and humidity chamber: It also belongs to environmental test equipment, it tests whether the product can resist high temperature, low temperature, humidity, or the physical and chemical changes produced under extreme conditions, the walk-in temperature and humidity chamber volume is large, the product is placed, or a large object can be placed, such as automobile, new energy, television and liquid crystal screen, etc. How to do the routine maintenance of the walk-in temperature and humidity chamber: 1. The wet gauze basically, if there is no special case, s/b usually changed once in 3 months 2. The water channel shall be regularly cleaned, including water cup, water tank, etc., so as to prevent the water from being blocked,affect the humidity test. 3. It is forbidden to test the flammable and explosive products inside working room. 4. Clean the chamber on a regular basis 2. How to operate walk-in temperature and humidity chamber: The operation method is same as standard temperature humidity test chamber,the controller is 7-inch LCD programmable color screen, you only need to setthe temperature point---test time--how many cycles need to be tested, This can be done automatically, and the machine will stop automatically when it is complete. If there is any problem during the operation, the corresponding problem point will be displayed on the machine control screen. Walk-in temperature and humidity chamber is a must equipment for reliability test of Automobile,Aerospace,Electronic parts,etc,the operation and maintenance are easy,it is teh tear down mahcine,Climatest engineers will be dispatched to do on-site support,for instance,we will finish commissioning,train customers how to operate,maintain,welcome to follow our company facebook page:http://www.facebook.com/Climatechambers...

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Material Aging Test-UV Weathering Test Chamber

Nov 15, 2019 | climatest symor

Material Aging Test-UV Weathering Test Chamber 1.What is UV aging? UV aging chambers use fluorescent ultraviolet lamp as light source to simulate UV radiation and condensation in natural sunlight, and to carry out accelerated weather resistance test in order to obtain the result of weather resistance of the material. UV aging detection is widely used in non-metallic materials, organic materials (such as coatings, paints, rubber, plastics and their products) under the change of sunlight, humidity, temperature, condensation and other climatic conditions to test the aging degree and situation of related products and materials. 2.Why we should do UV aging test? When the product is placed in the ambient environment, there will be different problems taken place, such as appearance changes, including cracking, speckle, powdering or color change, and even performance degradation,which may be due to the loss of components in the resin resulting in chemical bonds changes inside the molecular structure, this is mainly caused by sunlight, industrial exclusion of waste gas, bacteria and so on. The aging performance of the product directly affects the lifespan of the product, so aging test become significant,non-metallic materials, organic materials (such as paints, paints, rubber, plastics and their products) are subject to changes in sunlight, humidity, temperature, condensation and other climatic conditions to test the degree and condition of aging of related products and materials. The natural aging test is to put the plastic specimen under the sun exposure, and it is directly under the natural climate environment,to test the material performance under various factors such as light, heat energy, atmospheric humidity, oxygen and ozone, industrial pollution and the like, the most harsh climate condition should be selected,or near the actual application area of the material, the test site shall be open and flat, no obstacle to affect the test results,the specimen holder shall be facing the equator and at an angle of 45 ° from the ground. When the main performance index of the specimen has been reduced, the test s/b terminated when it achieve the minimum allowable use value . in most case,the test is terminated when the product primary performance index falls to 50% of the initial value. The natural aging process is a very slow process, and there is a great difference in different geographical conditions, which brings difficulties to evaluate the aging resistance of the product. It is an attempt to make an evaluation of the aging performance of the plastic in a shorter time,that is accelerated aging test. The accelerated aging test can be used to simulate the human light source of the fluorescent lamp, including the carbon arc lamp, the xenon arc lamp and the fluorescent ultraviolet lamp, and the artificial light sources can generate more light than the natural sunlight on the ground. When these artificial light sources are used, it is also common to use the combination of the condenser to simulate the rain drop, the dew and the like to conduct the aging test on the product....

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Fiber Optic Cabling

Nov 13, 2019 | ACI Technologies, Inc.

Fiber optic harnesses appear simple, but they have been designed to maintain all of the critical areas of aligning two fibers and minimize the losses associated with a break in the transmission path. In order to understand how the connectors overcome alignment issues, we must first understand the issues. Fiber optic communications networks use specific wavelengths of light (or colors) to transmit information through a clear fiber at high speed. They use the property of internal reflection along the fiber’s axis to contain the light and keep the optical power high enough to be detected at the receiving end. ...

Publisher: ACI Technologies, Inc.

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Design, IPC Standards Certification Center, Consultant, Service Provider, Training Provider

Serious to make dry oven

Nov 13, 2019 | climatest symor

Dry oven is a must instrument almost for every laboratory in different industries,with nearly 20 years efforts and innovation,Climatest now masters core technique of dry oven manufacturing,no matter on temperature uniformity or temperature stability.Behind the quality is 15 years of consistent persistence,strong belief in excellence; from design to R & D to production, from promotion to sales to installation; every step should reach excellence,What you see, you use our products, you choose, you feel that we do our best,this is our faith. Dry Ovens are used to dry or temper electronic components,material tests,torrefaction, wax-melting ,high temperature aging ,preheating and sterilization in industrial and mining enterprises, laboratories and scientific research institutes. .Exterior chamber is made by reinforced steel with painting; working chamber made by anti-corrosion stainless steel SUS#304 .Intelligent PID control, LED controller with over-temperature alarm,timing range within 0~9999min .Hot air circulation system composed of Germany imported low-noisy air blower and optimal air duct which ensure uniform temperature distribution .Double layers of glass door, large transparent window to observe specimen .Forced air convection Climatest manufactures desktop and floor-standing models with RT+10°C-200°C,250°C,300°C,350°C,400°C temperature range,and customized as per special requirement,if you wanna know more details about our dry oven,please visit our product page:http://climatechambers.com/industrial-dry-oven/200-degree-c-hot-air-oven.html...

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

How to inspect the temperature recovering time of thermal shock chamber?

Nov 12, 2019 | climatest symor

Thermal shock test chamber can be used for testing the chemical change or physical damage on composite materials caused by the thermal expansion and contraction of the sample in the shortest time,which is subjected to extremely and continuous high and low temperature environment.so how to check the temperature recovery time of this chamber? Normally we take following steps to inspect the temepratuire recovering time: 1.Install the temperature sensor at the specified position, and adjust the temperature controller of hot zone and cold zone to the required nominal temperature respectively. 2.The temperature increases and reduces respectively,30min after temperature in two zones reach stable status,record temperature value of the measuring point,pls set the temperature value of two zones to be required nominal temperature. 3.The temperature shock test chamber automatically places the inspected load into theh ot zone,select the corresponding retention time according to regulated standard. 4.Set the transfer time,then the inspection load is transferred from hot zone to cold zone, and the temperature of the measuring point is observed and recorded, and then the reverse conversion of the load from cold zone to hot zone is carried out according to the same method, and the temperature of the measuring point is observed and recorded. www.climatechambers.com...

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Origin and Quantification of Increased Core Loss in MnZn Ferrite Plates of a Multi-Gap Inductor

Nov 07, 2019 | Dominik Neumayr, Dominik Bortis, Johann W. Kolar, Stefan Hoffmann, Eckart Hoene

Inductors realized with high permeable MnZn ferrite require, unlike iron-powder cores with an inherent dis-tributed gap, a discrete air gap in the magnetic circuit to prevent saturation of the core material and/or tune the inductance value. This large discrete gap can be divided into several partial gaps in order to reduce the air gap stray field and consequently the proximity losses in the winding. The multi-gap core, realized by stacking several thin ferrite plates and inserting a non-magnetic spacer material between the plates, however, exhibits a substan-tial increase in core losses which cannot be explained from the intrinsic properties of the ferrite. In this paper, a comprehensive overview of the scientific literature regarding machining induced core losses in ferrite, dating back to the early 1970s, is provided which suggests that the observed excess core losses could be attributed to a deterioration of ferrite properties in the surface layer of the plates caused by mechanical stress exerted during machining....

Publisher: Power Electronic Systems Laboratory (PES)

Power Electronic Systems Laboratory (PES)

The research projects at the PES cover a wide range of application areas and all basic forms of power electronic energy conversion

Zurich, Switzerland

Research Institute / Laboratory

When you pull out the nitrogen pipe of nitrogen cabinet

Nov 07, 2019 | climatest symor

Many customers who have purchased the nitrogen cabinets have been in the mistaken belief that the air pipe can be pull down hard,so that it can cause the board to be damaged due to the hard pulling of the air pipe, which leads to the replacement of the penetrating board. Now, the following pictures are provided. Please note: Nitrogen cabinet is a optiomal choice for the microelectronics,semiconductor for humidity proof and anti-oxidation purpose,Climatest has put much efforts on the R&D of dry cabinets,as you know,our advangtage is to handle temperature and humidity,since early 1990s,our engineers began to test and research dry cabinet and nitrogen cabinet,all of our manufacturing process strictly follow ISO9001 standard,we supply to international customers for 20 years,if you are still looking for a reliable dry cabinet manufacturer to protect your MSD from moisture related damage,come to visit www.climatechambers.com,we are ready!...

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

Embedded Inductors with Laser Machined Gap

Oct 30, 2019 | Jim Quilici

This work presents the fabrication of embedded inductors and the experimental laser machining of gaps in the underlying ferrite structure. (...) Energy efficiency is a major driver in the evolution of electronics and electronics packaging. To manage power consumption, portable appliances (smartphones, tablets, e-readers etc.) often use multiple supply voltages and DC/DC converters. Most are based on switch mode power conversion (SMPC). In a power converter, inductors and transformers are used to temporarily store energy during switching cycles. They also have the function of filtering noise. The power magnetics are often the largest and most expensive devices in the circuit. Integrating the magnetics into either a power converter module or system board can significantly reduce size and cost of the power converter function....

Publisher: Radial Electronics

Radial Electronics

Radial Electronics develops magnetic components and subsystems for data communication, power conversion, and RF applications.

El Dorado Hills, California, USA

Components / Substrates

Why we need to proceed temperature humidity test?

Oct 29, 2019 | climatest symor

For every 10 ℃ increase in temperature, the reaction rate is twice to three times. This means that for every 10 ℃ increase in temperature, the life span of the product will be halved, and when the temperature rises by 20 ℃, the life span of the product will be reduced to 1/4. High temperature will lead to aging, oxidation, evaporation, physical deformation and so on. Low temperature will lead to embrittlement, ice formation, viscosity and solidification degree, loss of mechanical strength, physical shrinkage and so on. When the product is shipped, stored and operated in the environment, it will be endangered. In addition, each product has regulatory and certification requirements, and it is important to evaluate reliability and durability before it is put on the market. In general, according to the IEC60068 test standard, it requires the volume of the laboratory to be at least five times the total volume of the sample under test. Haida constant temperature and humidity box can help you meet this demand. So with the fast developmement of manufacturing industry,test becomes a necessity to see wether the product is able to meet regulated standards in R&D satge,Climatest Symor specializes in handling temperature and humidity,we supply environmental test chamber to China State-owned Research Institutes and laboratories,and obtain excellent reputation from international cllients,our company put much efforts on chamber R&D ,striving to supply best-quality climate simulation equipment and after-sale service. For details,pls visit our official website www.climatechambers.com...

Publisher: Symor Instrument Equipment Co.,Ltd

Symor Instrument Equipment Co.,Ltd

Climatest Symor® is the leading environmental simulation testing equipment manufacturer in China established in 2001, located at Dayang Industrial Park,Hefei,China.

Hefei, China

Manufacturer of Test Equipment

per page.

Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

On-board Dispensing of Dots & Lines

Precision Auger Dispense Pump