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Nov 20, 2022
Stencil Aperture Design for Next Generation Ultra Fine Pitch Printing
In this paper you claim that the area of a square is 21.5% larger than an equal sized circle in several places. This is incorrect. The ratio of the area of a square with side ...
Dennis Cote, Harding Instruments

Nov 17, 2022
What is Causing Long-Term Soldering Joint Cracking in Automotive Application?
Just wondering if the connector solder tails are plated with gold, as this could lead to gold embrittlement, which can cause cracked solder joints. J-STD-001 requires removal of gold plating on component pins with certain ...
Bill Belanger, Janco Electronics, Inc.

Nov 16, 2022
What is Causing Long-Term Soldering Joint Cracking in Automotive Application?
Hand soldering should not be allowed for professional electronics, including Automotive, because you will never be able to guarantee that every solder joint have had the correct time/temperature profile. The problems may as well be ...
Claus W. Nielsen, E-Consult International ApS

Nov 16, 2022
What is Causing Long-Term Soldering Joint Cracking in Automotive Application?
The first thing I look at when the defect is a PTH solder joint, other than the obvious visible solder joint formation on the top and bottom side, is the hole fill. X-ray several of ...
Richard Stadem, General Dynamics Mission Systems

Nov 12, 2022
Removing Warpage from PCBAs
Compufab Inc. has been providing PCB Stiffeners to electronic companies world wide for over 40 years. we are very aware of the PCB warping issues. You must install a mechanical stiffener on the PCB prior ...
Otto Steiner, Compufab Inc