128 copper osp results

Electronics Forum: copper osp (Page 1 of 13)

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Electronics Forum | Wed Jan 21 16:55:22 EST 2004 | patrickbruneel

Hi, Are you testing bare boards or soldered boards. Are the test probes in contact with soldered pads or contacting the copper with the osp coating (not soldered). If you could clarify this it would be easier to give some hints for probable causes.

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Electronics Forum | Wed Jan 21 17:43:04 EST 2004 | Kris

Hi, I had the same question. In our case we are contacting the copper with the osp coating (not soldered). any published reports that we can reference Thanks

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Electronics Forum | Thu Jan 22 08:48:42 EST 2004 | patrickbruneel

Kris, You will need to change your probes to "bite" into the surface twisting probes specialy designed for copper surfaces. The surface hardness of copper is a lot higher compared to tin. link to article from osp manufacturer (see page 5) http://www

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Electronics Forum | Thu Jan 22 09:21:45 EST 2004 | davef

Oh, another thing, we do not like to probe copper. It's hard, compared to solder, and beats-up the probes too much. [As Patrick Bruneel states in this thread.] Consider reflowing paste on your test pads.

Re: Where can I purchase a PCB with a bare copper grid for solder flux evaluations.

Electronics Forum | Mon Aug 30 16:10:10 EDT 1999 | Dave F

| I have looked through the IPC web page and surfed to frustration. Can somebody give me a lead? | Brian: We don't use an etched board. We use a special stencil, described below and print on bare copper laminate. 3 Solder Wetting Test. Recogniz