Electronics Forum | Wed Oct 01 10:30:33 EDT 2008 | stepheniii
Be sure to peel the potatoes. I saw a guy use a potato to purify gold on the TV show Rough Science. Seriously though I would think SAC305 to SN100C wouldn't be as bad as eutectic to leadfree.
Electronics Forum | Tue Oct 07 12:35:10 EDT 2008 | andy_pal
Hi All, I am using COB on my DOUBLE SIDED PCB. lastly we used Eletrolytic Ni / Flash Gold Plating. Our Boards vias Failed the UL corrosion Test. we did some cross-section analysis and found 10.75 �m of Nickel and 0.022 um of Gold and as the Process
Electronics Forum | Wed Oct 15 18:05:33 EDT 2008 | davef
Get started with this link to a thread in the fine SMTnet Archives http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=9250
Electronics Forum | Mon Oct 20 13:17:05 EDT 2008 | jdumont
No pictures pre-paste. I have noticed on a few occasions a couple of boards that look like they have a slight discoloration on some areas of the board. Kind of like a shadow almost on the gold. Josh
Electronics Forum | Tue Oct 28 12:02:11 EDT 2008 | milas
Hi We have recently specified the following on a bareboard that has an ENIG finish. Does it sound about right or is it likely to give me problems ? Nickel : 3uM � 7uM Gold : 0.05 uM � 0.1 uM Thanks in advance
Electronics Forum | Sat Nov 01 11:08:47 EDT 2008 | vladig
In addition to what Dave has said, you shouldn't worry much about having too much (too thick) of Au, as it's a self-limiting process. So Gold embrittlement isn't an issue. Regards, Vlad
Electronics Forum | Mon Nov 03 14:50:08 EST 2008 | dphilbrick
One other note, NEVER have an ENIG board fabricated by a house that "farms out" the gold. This always ends in disaster! Make sure whoever you choose does the whole process.
Electronics Forum | Wed Dec 03 11:48:54 EST 2008 | vleasher
Its mainly on the heavy hitters when the head is sitting over the feeder (Gold) and doing some multiple picks. Again this only seems to happen near the end of a reel. If we splice the reel is it picks perfectly directly after the splice.
Electronics Forum | Fri Jan 02 16:52:16 EST 2009 | boardhouse
Hi, From a Manufactures choice - Green is the best due to it is the most commonly used mask color in the industry & cheapest. Kind a like Red paint for Barns. For US shops, most only have one LPI machine and to continually switch from Green to othe
Electronics Forum | Thu Jan 22 05:29:25 EST 2009 | johanhuizing
I think IPC-4552 is define the thickness of Nickel as: 3 to 6�m and Gold as: 0,05�m minimum
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