Electronics Forum | Wed Sep 08 05:17:04 EDT 2010 | eddtsk
Hi, ran across a batch of PCB that has white silkscreen during receiving but turns purple/pink after our reflow process. SEM/EDX test can show there is no significant different element between the white and purple silkscreen. Can any help advice what
Electronics Forum | Thu Aug 28 23:15:44 EDT 2014 | phyllishwl
Hi all, Our production reported that they found 3 panels out of 53 panels with strange phenomenon after reflow. 1/ Blister / Delamination of PCB panels, 2pcs blister/delamination under solder mask, 1pc under Gold plating at Gold finger 2/ Silkscr
Electronics Forum | Fri Aug 29 09:39:08 EDT 2014 | rgduval
I'll try to deal with the issues as you've presented them. 1. Blistering/delamination, shown in photo 2. The most likely cause of blistering/delamination like this is moisture in the boards. The moisture can get into the boards in multiple ways..
Electronics Forum | Mon Aug 08 22:51:39 EDT 2005 | plcc
Hi Davef, The whole laminate turns yellowish.
Electronics Forum | Mon Aug 08 05:43:09 EDT 2005 | plcc
Does anyone come across the problem of pcb turns yellowish color after going thru' reflow under ROsH condition?
Electronics Forum | Mon Aug 08 21:43:23 EDT 2005 | plcc
Hi Davef, After reflow, the pcb board turns yellowish color. However, the board still pass thru' functional test.
Electronics Forum | Tue Aug 02 15:02:50 EDT 2016 | davef
ASPIS (Advanced Surface Protection for Improved Reliability PCB Systems) The three year Aspis ‘Research for SMEs’ project has been conducted to address problems found with the nickel gold (ENIG) solderable finishes that are used by the electronics in
Electronics Forum | Thu Jun 30 03:14:34 EDT 2016 | andrzej
Looks like "black pad" issue. More about this here: http://www.ipc.org/feature-article.aspx?aid=Black-pad Definitly PCB supplier need to improve the process.
Electronics Forum | Mon Aug 08 22:40:49 EDT 2005 | davef
Jim Can you be more specific? What's going "yellowish" on you? * Laminate * Solder mask * Legend
Electronics Forum | Wed Apr 22 09:32:36 EDT 2015 | mbb
Thank you for answering, Yes, we have 3 different capacitors for each daughter board with 4 boards/PCB. Another information that could help that we have the issue randomly on boards (not a specific one). The occurance of the issue is random. yes,
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