Electronics Forum | Wed Aug 25 00:10:13 EDT 2021 | sarason
The company that does this is McDermid. There are multiple different ways of doing it. Screen print silver paste onto the mylar, "activate" the film to be conductive, then plate in copper. These processes are found in the patent literature which is e
Electronics Forum | Mon Aug 30 15:39:24 EDT 2010 | jamesc09
Dave, Thanks for the reply. I didn't realize that you would be able to measure it by cross-section. I guess I was making it more difficult that it had to be. Thanks.
Electronics Forum | Fri Sep 03 03:17:59 EDT 2010 | nibirta
Dave can you be more specific on this? I will be interested to see such a picture from cross-section with an oxide layer. Is this possible? Thanks in advance. Nicoleta.
Electronics Forum | Fri Sep 03 04:00:10 EDT 2010 | sachu_70
James, Are you referring to oxidation caused on outer layers of PCB on account of poor OSP finish over Cu?
Electronics Forum | Wed Sep 08 11:36:18 EDT 2010 | blnorman
SERA testing (sequential electrochemical reduction analysis)can measure surface oxidation, not sure on inner layers.
Electronics Forum | Tue Sep 14 13:40:50 EDT 2010 | rayguide
SERA testing is the solution. Try it. http://www.suite101.com/content/circuit-board-design-diagram-and-assembly-a249751
Electronics Forum | Mon Oct 23 03:52:32 EDT 2017 | wendymm
Hello guys, I'm a new learner in PCB field. And recently, I have summarized some basic information I learnt on how to arrange the line on crystal oscillator, but I'm not sure if it is right. So I'll write it down below, hope anyone who may read my po
Electronics Forum | Mon Oct 09 07:50:22 EDT 2006 | quad
We currently run two Quad IVC's (we are very pleased with them) and two Versatronics for simple small volume batch work. We now need an additional machine capable of placing components at least three times as quickly as a IVC. We don't do anything ve
Electronics Forum | Tue Dec 01 07:24:44 EST 1998 | Earl Moon
| Hi folks , | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspection
Electronics Forum | Tue Dec 01 07:54:49 EST 1998 | kallol chakraborty
| | Hi folks , | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspec
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