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Knowledge, Vision & Wisdom Mar 5, 2015
Mixed Cleaning - No Clean and Water Soluble
What problems might we encounter if we clean no clean boards using a water wash systems set up to clean water soluble fluxes.
Board Talk
Flexible Circuit Materials for High Temperature Applications
This paper reports on test results for various flexible materials with recommendations for the best flexible materials for high temperature applications.
Materials Tech
Tombstoning Dilemma
Tombstoning Dilemma
We're having a problem with small chip tombstoning. I'm curious to read your input on the possible cause and how we can eliminate it.
Ask the Experts
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How To Measure Conformal Coating Thickness
How To Measure Conformal Coating Thickness
Industry expert Bob Willis explains how to use "sticky dots" to measure conformal coating thickness.
Production Floor
World's Fastest Thin-film Organic Transistors
Researchers have developed the world's fastest thin-film organic transistors. This new technology could become the foundation for cheap, high-performance displays.
Technology Briefing
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A Model for Life of SnAgCu Solder Joints
Almost all reliability assessment is focused on the anticipated life in service. The question, how large a cycling temperature range is required for a model to apply.
Analysis Lab
Analysis of Laminate Material Properties for Correlation to Pad Cratering
Analysis of Laminate Material Properties for Correlation to Pad Cratering
In this study, two Pb-free-compatible laminates were tested, with one dicy-cure non-Pb-free-compatible as control.
Analysis Lab
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Solder Deposits During Wave Soldering
Solder Deposits During Wave Soldering
During wave soldering, is there a possibility for solder to deposit on SMT components or cause a solder bridge between component pins?
Ask the Experts
AOI in an 01005 World
Paper discusses how AOI has become an essential tool to ensure a superior yield in the assembly of 01005 components.
Production Floor
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Are There Standards Governing Polarity Marks?
Are There Standards Governing Polarity Marks?
Is there a standard that governs how polarity marks are used to denote orientation of components on circuit boards?
Board Talk
Cost Comparison of Complex PCB Fabrication
In this paper, the authors present an alternative to sequential lamination for fabricating complex PCBs, where conductive paste is used as interconnect between cores.
Production Floor
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Dissruptive Innovation - Magnetic Refrigeration
Dissruptive Innovation - Magnetic Refrigeration
The refrigeration market has been ripe for disruption for decades. Now, a new technology called "magnetic cooling" may be on the verge of doing just that.
Technology Briefing
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Plating Lead-free Parts for Tin/Lead Assembly
Plating Lead-free Parts for Tin/Lead Assembly
Is there a process that can be used to re-plate component leads to add lead?
Ask the Experts
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Influence of Via Stub Length and Antipad Size
Influence of Via Stub Length and Antipad Size
The paper describes the test vehicle and electrical performance characteristics of the various test cells. A recommendation for an acceptable stub length is given.
Analysis Lab
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The Ink Spitting Autowriter
The Ink Spitting Autowriter
A factory was testing a new auto writing system. It went haywire when a big fork truck passed by. What was causing this?
Mysteries of Science
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