Electronics Forum: carbon ink (Page 1 of 2)

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.

Removing carbon finish from pcbs

Electronics Forum | Tue Jun 06 21:15:23 EDT 2017 | davef

I'd be surprised if you find a non-destructive method of removing carbon ink. Your best bet is following the recommendations of your ink supplier.

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

Graphite/Carbon deposit on PWB ( any Industrial Specs?)

Electronics Forum | Thu Mar 05 22:13:16 EST 2009 | davef

There is no IPC specification on carbon ink. Consider talking to your ink supplier to develop the proper quality definition that you require. Most suppliers have a good understanding of their product performance, for instance: http://www.coates.com/

Wave Soldering Of Carbon Ink Buttons

Electronics Forum | Mon Dec 17 17:30:40 EST 2001 | davef

One of our board fabricators says that carbon inks should be selected based on the process to be used by the assembler. So, their take on this question has some inks that work fine with nc fluxes, others that do not. They suggest: * Determining t

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

Graphite/Carbon deposit on PWB ( any Industrial Specs?)

Electronics Forum | Fri Mar 13 11:55:23 EDT 2009 | boardhouse

Hi GSX, just and FYI on why you are seeing a difference per lots. Carbon Ink is Not used on a steady bases by most manufactures, and shelf life of the Carbon ink is fairly short, my guess is what they are doing is adding thinner to the carbon ink t

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

ENIG switch contacts

Electronics Forum | Fri Aug 05 12:13:28 EDT 2005 | spommer

As part of our conversion to lead-free, I'm redesigning a pcb that had switch contact patterns screened on the board using carbon ink. On the new board, I plan on using the ENIG process and having the switch contacts be patterns of copper with the n

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