Electronics Forum: carbon pads (Page 1 of 3)

Removing carbon finish from pcbs

Electronics Forum | Thu Jun 08 11:05:27 EDT 2017 | davef

By the way that you stated your question, I assume that you want to do something different with the carbon inked pads. If that's incorrect, instead of removing your carbon ink, considering printing an insulating layer over the ink.

Wave soldering of Carbon Switch pads on PCB

Electronics Forum | Mon Apr 07 21:08:52 EDT 2003 | Satbir

Is this safe to wavesolder the PCB in wave contaning carbon pads for switch or somekind of masking is to be put on that pads.

Wave soldering of Carbon Switch pads on PCB

Electronics Forum | Mon Apr 07 22:07:25 EDT 2003 | davef

It depends on the carbon polymer that the fabricator printed on your board. It could be: * No wave soldering * Wave soldering with a peelable mask * Wave soldering ... probably one of the latter two. Watch it. Some temporary masks can affect the

Carbon Ink vs Immersion Gold for key pads.

Electronics Forum | Tue May 02 20:55:10 EDT 2006 | Board House

Hi all, I'm looking for anyone with info in regards to reliability of carbon ink vs. Immersion Gold Key pads. I have customers that still request Carbon Ink for there Key pads, while the majority have switch to Immersion Gold. Is there any readin

Carbon Ink vs Immersion Gold for key pads.

Electronics Forum | Wed May 03 15:56:25 EDT 2006 | Board House

Hi Patrick, Thank you for the info, We like to push ENIG, for us being the ENIG line is in house it is cheaper to use than the carbon, plus shelf life of the Carbon is an issue in Storage. Pre-application. Thanks again, Mike

Carbon Ink vs Immersion Gold for key pads.

Electronics Forum | Wed May 03 22:14:29 EDT 2006 | davef

We think well done carbon ink and well done ENIG are equally reliable [maybe 1M operations]. If the gold is pourous [not all that an uncommon], ENIG is far less reliable than carbon ink.

Wave Soldering Of Carbon Ink Buttons

Electronics Forum | Fri Dec 14 10:59:23 EST 2001 | Donald C. Burr

We are considering converting from a water wash wave solder porcess of carbon ink touch pad buttons to a no-clean process. Since the carbon ink buttons are exposed to the molten solder, we are concerned about the residue that is left behind from the

Carbon Ink vs Immersion Gold for key pads.

Electronics Forum | Wed May 03 15:00:44 EDT 2006 | patrickbruneel

It all depends on process, design and environment in which the contacts are used. Both have excellent conductivity characteristics Both don't oxidize over time On the other hand gold is much softer then carbon, and after hitting that contact a gazil

Re: Gold boards OK with SMT?

Electronics Forum | Thu Aug 06 13:09:37 EDT 1998 | Ben Salisbury

Is there any problem using SMT on gold boards? 15 years ago we were told not to use gold boards, but I can't remember why. Judging by the other postings it now appears to be common. Only problem I see is that the nickel should be plated, not ele

Changing Ni/Au finish to HASL lead free

Electronics Forum | Thu Jan 06 17:33:07 EST 2011 | boardhouse

Hi Johan, Sounds like you have already gone over your product very well to reduce product cost. Switching away from Deep gold Tabs & carbon ink Key pads can save quite a bit. The only other thing to suggest would be material - Moving away from Isol

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