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Knowledge, Vision & Wisdom May 28, 2015
What Causes Wave Solder Bridging?
We are having lead bridging problems with our wave soldering system. How would you rank the likely causes and areas to investigate?
Board Talk
White Discoloration After Ultrasonic Cleaning
We are using halogen free no-clean solder paste and cleaning with an ultrasonic cleaning system. After cleaning there is a white discoloration on the soldered areas.
Ask the Experts
Challenges for Step Stencil Printing
Challenges for Step Stencil Printing
The focus of this paper is on the printing performance of step-up/step-down stencils and the paper ends up with a short outlook on 3D cavity printing.
Production Floor
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Major Game-changer for the Lighting Industry
Major Game-changer for the Lighting Industry
Many researchers have attempted to construct light sources with carbon nanotubes, but with little success. That could soon change.
Technology Briefing
BGA Site Modification - Is It Possible?
Here we cover a type of BGA site modification that uses a section of circuit track and a jumper wire to complete the modification.
Production Floor
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Embedded Passive Technology
This paper summarizes the selection of resistor embedded materials, evaluations of resistive material and duplication of a complex digital design.
Materials Tech
Problem Areas for Selective Conformal Coating
Problem Areas for Selective Conformal Coating
This paper covers how to deal with problem areas for selective conformal coating for use in environments that are not friendly to electronic circuits.
Production Floor
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How to Re-Certify a Reflow Oven After Moving
After moving a reflow oven what steps need to be performed on the machine and the heat exhaust system to re-certify?
Ask the Experts
Inclusion Voiding in Gull Wing Solder Joints
Inclusion Voiding in Gull Wing Solder Joints
This paper provides definitions of the different voiding types encountered in gull wing solder joint geometries.
Analysis Lab
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Reactions of Sn in the Cu-Sn-Zn Alloy
Reactions of Sn in the Cu-Sn-Zn Alloy
This paper reports a number of experimentally determined reactions that occur in Sn-rich Cu-Sn-Zn alloy.
Analysis Lab
Can Mixing Wave Solder Pallets Cause Contamination?
Our wave solder pallets are made from Durastone material. Can we use the same wave solder pallets for leaded and lead-free or should they be unique to one solder type?
Board Talk
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The Intelligent and Secure Factory Floor
The Intelligent and Secure Factory Floor
In the near future, products moving along a production line will know where they are, which steps are completed, and what is needed for completion.
Technology Briefing
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PCB Assembly System Set-Up for PoP
This paper will explore the challenges and solutions of PoP assembly for the SMT assembly system.
Production Floor
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Guide to Understanding Your Testing Lab
Paper covers test methods specific to the various global eco-compliance directives as well as the different instrumentation used for these types of analyses.
Analysis Lab
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Corrupted Magnetic Tracking System
Corrupted Magnetic Tracking System
Magnetic traveler cards were being used to track information. Suddenly one section was unable to read the data. What was the cause?
Mysteries of Science
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