Electronics Forum | Mon Aug 30 10:39:08 EDT 2010 | jamesc09
Is there any way to measure the copper oxide thickness on the inner layers of a PCB? I have been asked to investigate this and am not sure if it is possible. If it is, please tell me by what method, any contract labs that can do it, or the name of
Electronics Forum | Fri Aug 14 08:59:51 EDT 1998 | Dave F
| | | Hi, can you please tell me how to make green coating and through-hole plating of PCB? Thanks! | | | Xingsheng | | Xingsheng: Welcome. | | Bible on PCB fabrication: Printed Circuits Handbook, Clyde Coombs, McGraw-Hill | | Web resources: htt
Electronics Forum | Fri Aug 14 07:27:42 EDT 1998 | Earl Moon
| | Hi, can you please tell me how to make green coating and through-hole plating of PCB? Thanks! | | Xingsheng | Xingsheng: Welcome. | Bible on PCB fabrication: Printed Circuits Handbook, Clyde Coombs, McGraw-Hill | Web resources: http://www.pw
Electronics Forum | Thu May 07 19:29:40 EDT 2009 | kareal
Hi Davef, Do you means it is natural for tin diffusion to copper trace during SMT process? but I could not detect tin in UHAST T=0 unit, and the tin diffusion was found only in copper trace of C4 cage. Two question: 1) Could you tell me which pr
Electronics Forum | Tue Jul 08 12:11:17 EDT 2008 | gabriella
Hello, you will probably need more temperature. Notebook - probably the board is designed to transfer more heat(insude layers all copper). Tell us more about the problem you have and something about the board. what exactly is your problem? You can't
Electronics Forum | Thu Jul 14 19:12:40 EDT 2005 | sync40
Hi. In the past years I had made dozens of PCBs but now I am trying to get a professional finishing on them. The main problem is oxidation of the copper traces. Basically I use the silkscreen method to make the pattern in both layers and then etch. L
Electronics Forum | Thu Jul 31 15:41:23 EDT 2003 | davef
Q: Could any of you guys tell me what exactly is this greenish thing ? A: No, but is not copper oxide. Copper oxide is brown, the color of a penny [here in the US] or an untreated copper laminated trace on a board. Many copper salts are greenish in
Electronics Forum | Fri Aug 21 12:54:21 EDT 1998 | Tryin' and Learnin'
HASL: (hot air solder leveling) is a process used to cover the Cu. Either Sn/Pb is used or Ni/Au or some other combo. In one case you create a land pad and in the other (with resin)you cover the Cu so that you only have a "trace." Is that correct so
Electronics Forum | Thu Apr 08 08:34:34 EDT 2004 | Evtimov
The camera is in the head. Sorry forgot to tell you.Stefan now I do the calibration with inprint in a putty. Ken I am looking for accuracy when I calibrate the camera. Tell me more about that slug. What is it like? Where to place it? How to use it?
Electronics Forum | Sat Jul 02 10:27:19 EDT 2022 | madisreivik
Hello ! I got exp only with leadfree HASL, but maybe the same problems apply. Also, the leaded HASL has probably lower process temperature. This could be copper, which has settled to the tank bottom. With leadfree, the copper is removed from molten
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