Electronics Forum | Mon Jun 25 03:52:24 EDT 2012 | awtm
Our Customer had detected tarnished pad on ImAg PCBA and had conducted several SEM-EDX test at the soldermask below some of the chip resistors. High concentration of sulfur was found and it can be significantly reduced after further chemical cleaned
Electronics Forum | Wed Feb 21 21:28:24 EST 2001 | davef
I don't know where sulfur would get into your resistor supplier's process. Your processes are more likely candidates.
Industry News | 2021-02-18 15:54:21.0
Vishay Beyschlag Precision Automotive Grade Thin Film Chip Resistor Arrays are enhanced with Higher Resistance Ratios up to 1:100 and Operating Voltages up to 100V
SMTnet Express, July 16, 2015, Subscribers: 23,036, Members: Companies: 14,463, Users: 38,550 Testing Printed Circuit Boards for Creep Corrosion in Flowers of Sulfur Chamber iNEMI (International Electronics Manufacturing Initiative) Qualification
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