Electronics Forum: copper foil take off (Page 1 of 12)

BGA dropping off the board

Electronics Forum | Fri Feb 15 17:50:30 EST 2008 | stevek

Creating a sound tin nickel intermetalic takes a bit more energy than other finishes (such as copper or tin). You can achieve wetting, but not have a viable intermetalic. You should cross section some intact boards from that process and see what th

Re: What is the typical BGA substrate pad alloy

Electronics Forum | Tue Dec 07 20:07:21 EST 1999 | Dave C.

Thanks for all the info Dave. It's the interconnect between the copper foil pad and the eutectic solder ball that I'm most interested in. The BGA in question is very thin gold plated over nickel over the copper. When we are reworking the BGA, i

Compressor air line material

Electronics Forum | Sat Jun 23 11:35:58 EDT 2007 | grantp

Hi, Yes, we just built a new plant, and used copper again. The stuff we cut out of the old building was copper, and it was fine without any issues. We lay it on an angle so condensation flows to an end, and can be periodically vented, and we take a

Labeling of SMT solder stencils

Electronics Forum | Tue Sep 14 14:25:35 EDT 2004 | scombs

Thanks everyone for all the input. All of our stencils do have the PCB # etched on the foil but when operators look for the stencils they are looking for the part # on the frame since they are all stored vertically in a couple of Remstar shuttles and

ENIG-BLACK PAD!!!!

Electronics Forum | Fri Dec 08 13:01:35 EST 2006 | Cmiller

I cant seem to get to that link but we tried everything we could think of and there was no way we found to get solder to adhere to the pads. I guess if you took a burnishing brush and polished the nickel off and got down to the bare copper you may be

Re: PCB fab supplier supplier/evaluation

Electronics Forum | Sun Aug 08 11:15:32 EDT 1999 | Earl Moon

Mike, Got your message and those of others concerning PCB fab supplier evaluation and qualification check lists, etc. I have a severe problem here in WI as I can hardly access the internet, and when I do it is cut off abruptly for no goo

tamper proof (but removable) labels

Electronics Forum | Wed Jan 30 13:45:59 EST 2019 | slthomas

I'm wrestling with the infamous adjustable torque drivers on the production floor. Despite a procedure that clearly forbids it, we still have the occasional know-it-all that will just crank the knob until the desired setting is visible in the windo

Ekra Stencil Printer

Electronics Forum | Thu Aug 03 10:13:41 EDT 2006 | wrongway

Hello Rush fan we have a Ekra E5 had it about a year the only thing I dont like is the foil on top of the doard holders you can take them off but if your board is warped then it dosnt clamp the board and it will fail the vision but we hav

Re: Very high interconnect density

Electronics Forum | Thu Sep 30 03:37:26 EDT 1999 | Brian

We are all faced with increasing interconnect density in all we do. This means smaller everything, especially components and that which they are mounted upon but, hopefully, without smaller minds and thoughts. It all demands more process control an

Re: Very high interconnect density

Electronics Forum | Fri Oct 01 00:18:18 EDT 1999 | Earl Moon

We are all faced with increasing interconnect density in all we do. This means smaller everything, especially components and that which they are mounted upon but, hopefully, without smaller minds and thoughts. It all demands more process control

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