Electronics Forum | Wed Feb 23 02:20:09 EST 2000 | Roni H.
Hi, I need a wear resistance PCB finishing over bare copper (If exist!), the surface have a moving part which slides over it and bare copper as a surface is not good enough. I'll apprechiate any information. Thanks Roni
Electronics Forum | Wed Feb 23 02:20:09 EST 2000 | Roni H.
Hi, I need a wear resistance PCB finishing over bare copper (If exist!), the surface have a moving part which slides over it and bare copper as a surface is not good enough. I'll apprechiate any information. Thanks Roni
Electronics Forum | Sat Jun 19 08:37:25 EDT 1999 | Dave F
| There is a PCB with SMD components glued on bottomside. When I make tests for checking the resistance of glue the result is a break in the surface of PCB. | | How can I measure the surface resistance of PCB surface? | How can I increase this resis
Electronics Forum | Fri Jun 18 08:19:12 EDT 1999 | Sergio Luiz Vito
There is a PCB with SMD components glued on bottomside. When I make tests for checking the resistance of glue the result is a break in the surface of PCB. How can I measure the surface resistance of PCB surface? How can I increase this resistance?
Electronics Forum | Sun Sep 08 15:07:42 EDT 2013 | davef
PCB designers specify the application of solder mask [eg, varnish, solder stop mask, solder resist, etc] to fabricators to reduce the potential of bridging between two conductive traces during assembly soldering processes [eg, wave, reflow and hand s
Electronics Forum | Sat Feb 12 06:10:48 EST 2011 | lafir
Flexible substrate coated by PR+, found many open trace. The Photo resist peels off from CU surface randomly creating open circuit during devolopement. Any ideas???
Electronics Forum | Thu Aug 27 13:30:04 EDT 2020 | emeto
If there is damage of the glass coating or exposure of the resistive element it is a defect.
Electronics Forum | Tue Aug 23 09:53:05 EDT 2005 | davef
There's some good background information on SIR [surface insulation resistance] on the web. Here's an example: http://www.tracelabs.com/TechLibraryDoc.aspx?id=4 Look to IPC-9201 - Surface Insulation Resistance Handbook SIR readings vary with: * C
Electronics Forum | Tue Jun 21 17:27:10 EDT 2022 | kojotssss
Offcourse, RH is between 47-50%. The cause of problem is that the one of the embossed carrier reels/package materials coming from supplier static charged. Material now is like insulating, not dissipative or conductive. Example: https://drive.google.
Electronics Forum | Wed Aug 21 10:26:08 EDT 2002 | stownsend
We are using OSP coated boards and no-clean solder paste. In a few instances, we are seeing increased distortion in an audio circuit. Has anybody seen or heard of surface insulation resistance (SIR) decreasing after reflow on OSP boards? Is it possib
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