Electronics Forum | Sun Nov 02 22:18:32 EST 2014 | jojoliang
What's the specification of the PCB, usually the silk screen can not change.
Electronics Forum | Thu Oct 30 23:50:38 EDT 2014 | beilimanu
Reason is the quality of silk screen oil is bad.
Electronics Forum | Wed Aug 13 16:38:00 EDT 2014 | anvil1021
We are seeing some PCBs especially from foreign sources that exhibit silk screen color change after reflow? Has anyone else seen this lately?
Electronics Forum | Sun Nov 16 19:05:45 EST 2014 | warwolf
Seen it. We use a lead free process, sometimes our supplier will use a lead process silk screen that burns at a lower temp. The HASL coat was still SN100CL.
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 Jan 15 20:03:09 EST 2024 | griinder
Does anyone have experience of using a stainless Fine Grain SMT stencil for the purposes of applying ink to bare PCB's? We are exploring the possibility of getting a stencil to apply a letter that reflects the revision to each of 25 PCB's in a panel.
Electronics Forum | Thu Jul 13 22:20:38 EDT 2000 | Dave F
=10 mils larger than lead 3 silk screen legend text weight >=10 mils 4 pads >=15 mils larger than finished hole sizes 5 place through hole components on 50 mil grid 6 no silk screen legend text over vias (if vias not solder masked) or holes 7 so
Electronics Forum | Thu Mar 08 09:38:35 EST 2001 | blnorman
We've been using pre-printed labels on our PCB's for years, with 8 - 10 hours a week down time associated with them. Last October we put a CO2 laser marker on one of our lines. In 6 months we've had a total of 30 minutes down time. We use a 2D b
Electronics Forum | Thu Dec 24 08:44:25 EST 1998 | Earl Moon
| | | | Folk's, | | | | I'm in need of some help / direction. I'm working on my thesis for a masters based on looking at the effect's of the solder resist promoting / reducing the amount of solder ball's during wave. I'm looking at thing's like colou
Electronics Forum | Sat Mar 06 08:19:50 EST 1999 | Dave F
| Clarissa, | | Dave had good suggestions. We load several boards manual at this time. We set our components up in clearly marked bins. The documentation includes a chart with the part number, bin number, reference designator and color code for t
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