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 | Tue Sep 02 21:34:23 EDT 2014 | phyllishwl
Thanks Rob for your detail comment. It is really helpful!!
Electronics Forum | Wed Sep 03 03:51:36 EDT 2014 | methewbell
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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 | Thu Sep 04 05:18:45 EDT 2014 | sasa29
PCB Manufacturing demands preparation of design well in advance. The finalized designs are fed into the systems and the production is carried away. If the boards are of small sizes, multiple boards are made on a single large board and separated into
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 | Sun Mar 12 18:20:08 EST 2006 | jldowsey
Thanks Russ. As it turned out, it was an incomplete cure at the fab house. Rhey sent another fab over from the same lot that had sat for 3 more days, and it came out lavender instead of purple! have a good one!
Electronics Forum | Thu Sep 16 00:23:43 EDT 2010 | eddtsk
Hi All, thanks for your precious reply. We had been trying very hard to ocnvince the customer that there is nothing wrong with the PCB but they are still unwilling to accept the change of silkscreen color. We attribute the silkscreen issue to a bad b
Electronics Forum | Wed Sep 08 15:21:31 EDT 2010 | davef
ENIG boards, correct? If so, you'll find that purplmation of your silkscreen has nothing to do with your process and everything to do with the quality of your in-bound boards.
Electronics Forum | Wed Sep 08 20:14:27 EDT 2010 | eddtsk
Hi Davef, ues, its ENIG. But do you know what the causes this? We send the board for testing but finds nothing defferent chemically between the white and the purple silkscreen. The supplier claim that its our process that is caused the changes.
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