Electronics Forum | Thu Sep 17 23:36:35 EDT 2009 | Sean
All, We know that incomplete immersion silver could potentially lead this creeping corrosion. Is there any way to check bare PCB for incomplete immersion silver coverage, especially on the via hole area? Thanks, Sean.
Electronics Forum | Thu Sep 03 12:03:52 EDT 2009 | Sean
Hi All, I have few questions about creeping corrosion that potentially happen on lead free immersion silver PCB as below: 1) What test that we can conducted to verify whether the failure we seen is due to creeping corrosion? 2) I heard that lead fr
Electronics Forum | Tue Sep 08 14:35:12 EDT 2009 | davef
Maybe your solder mask supplier can provide additional background
Electronics Forum | Thu Sep 03 14:21:29 EDT 2009 | davef
Creeping corrosion occurs on bare metal. Most commonly, it is seen on boards with thin protective coatings [eg, bare copper, immersion silver, organic solderability preservative]. Look here: * enthone.com/docs/AlphaSTARCreeping.pdf * circuitree.com
Electronics Forum | Fri Sep 04 07:26:23 EDT 2009 | Sean
Dear Davef, Thanks for sharing with me..I observed this creeping corrosion tend to appear on PCB via hole rather than other PCB location. Why this problem did not appear on PCB traces? Besides, I also notice that this problem only appear on the PC
Electronics Forum | Tue Nov 29 17:18:26 EST 2022 | davef
Yes, electronics manufacturing is a volume producer of cardboard waste. If the components are ESD-critical, cardboard and most plastics are not ESD safe. Static charges can be generated on these materials during handling by the friction of dissimila
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 | Sat Jul 28 08:37:52 EDT 2007 | davef
There is no good choice. Board Finishes: Industrial/Battelle Class 3 Environment [Reliability Knowledge Gaps: For use of Pb-free solders in High Reliability Applications, J Smetana, iNEMI Availability of SnPb-Compatible BGAs Workshop, March 1, 2007,
Electronics Forum | Tue Feb 21 01:32:49 EST 2017 | soldertraining
Looking for advice on soldering lead free paste to a board with very heavy gold plating, In my opinion, Gold contact surfaces are often used on circuit boards with membrane switches which is a choice of technology for industrial, commercial and consu
Electronics Forum | Thu Sep 01 11:18:16 EDT 2005 | patrickbruneel
Steve, Let me try to give you a short answer to your question. A good book in soft soldering would talk about the excellent characteristics of leaded alloys and all the reasons why leaded alloys are very reliable. In short a good book would advice y
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