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
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.
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
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
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
Electronics Forum | Thu Aug 06 13:18:30 EDT 1998 | Bob Willis
| | 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 e
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
Electronics Forum | Fri Aug 07 07:52:15 EDT 1998 | Earl Moon
| | 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 e
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
Electronics Forum | Mon Aug 10 21:52:34 EDT 1998 | Dave F
| | | 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
