Electronics Forum | Sat Mar 25 07:10:12 EST 2006 | davef
We agree with Chris. If your gold is applied properly and is the correct thickness, you will see no difference. One nit on Chris' comments: immersion gold will plate-out [self-limit] around 8 thou, although we've heard 12 thou.
Electronics Forum | Mon Mar 27 09:54:35 EST 2006 | russ
Flash gold is usually to thick and will cause embrittlement of your solder joints if concentration exceeds I beleive 6% in the joint
Electronics Forum | Thu Apr 20 13:42:23 EDT 2006 | fredericksr
I've seen embrittlement %s down to 3%, but a standard 5 mil solder pad would require well over 100uIn of plated gold to cause embrittlement. -Other Russ
Electronics Forum | Wed Jun 03 01:59:41 EDT 2009 | nibirta
Thank you all for these helpfull informations. I knew that I always can have the right support from you :) Tks again. Nico
Electronics Forum | Wed Jun 03 11:04:32 EDT 2009 | joeherz
Another thing to consider - If you're processing lead free, the nickel layer between the copper and gold provides extra protection against copper dissolution. This is a nice piece of insurance especially when performing rework. Cheers
Electronics Forum | Sat Jun 06 15:16:17 EDT 2009 | jameskelch
Here is a link to a recent industry article that may be of service: http://www.pcb007.com/pages/zone.cgi?a=49717
Electronics Forum | Mon Aug 16 11:49:44 EDT 2004 | Kris
Hi Guys thanks for the replies. Dave, the spec is not for enig but for hard gold does your response alter if thats the case /
Electronics Forum | Mon Aug 16 16:26:19 EDT 2004 | Kris
what about areas that are soldered ? This is def not a Enig process and the specs are as they are not sure why thanks a lot for your help
Electronics Forum | Mon Aug 16 13:18:46 EDT 2004 | davef
You bet our reponse changes. Q2R: Hard gold thickness is 4 to 10 u" for Au and 300 to 400 u" for nickel A2R: This is a hard gold spec?? It looks like a ENIG spec. Although, the Ni is quite heavy, 150 uin is sufficient for most applications. The gol
Electronics Forum | Mon Aug 16 16:37:08 EDT 2004 | davef
As we mentioned in an earlier response in this thread [Q5], you do NOT want to solder to hard gold. Hard gold is a wear surface. [That's IT, that's the LIST.] If you want to solder to gold, then either use: * IPC-4552 ENIG specification, mentioned
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