Electronics Forum: gold plating thickness (Page 1 of 107)

Gold plating thickness on gold finger

Electronics Forum | Thu Oct 07 20:34:48 EDT 1999 | Tony Huang

Hi, Does anybody know what is the minimum gold plating thickness on the PCB goldfinger required by the industrial specifications - IPC, Bellcore, etc. Where can I find the information? Appreciate for the help! Thanks, Tony

Re: Gold plating thickness on gold finger

Electronics Forum | Fri Oct 08 17:12:31 EDT 1999 | Dave F

Hi, Does anybody know what is the minimum gold plating thickness on the PCB goldfinger required by the industrial specifications - IPC, Bellcore, etc. Where can I find the information? Appreciate for the help! Thanks, Tony Hi Tony:

Poor reflow over gold plating

Electronics Forum | Tue Jun 28 19:56:59 EDT 2005 | davef

Matt: Yes, if the gold was really thick, it could appear like your pictures. In measuring gold plating thickness, we'd want to use xray fluorescence [XRF]. For alternatives, look here: http://www.pfonline.com/articles/pfd0027.html

soldering to thick gold plating

Electronics Forum | Tue Jul 11 14:09:54 EDT 2006 | Chunks

Not reflowing completely. Slower = hotter. Try a slower conveyor speed.

Poor reflow over gold plating

Electronics Forum | Tue Jun 28 09:39:00 EDT 2005 | davef

Points to consider are: * Gold plating too thick [SB LT 8 uinches]. [Obviously, we're talking about actual plating thickness, not the specification.] * Reflow recipe improper [SB 220*C 5-10 sec]. A recipe that works fine for HASL needs to be hotter

soldering to thick gold plating

Electronics Forum | Wed Jul 12 11:46:00 EDT 2006 | flipit

Hi, One other note. You don't want gold to be more than 1% to 2% of the the solder joint. Above this percentage you will have embrittlemant issues. Lots of information on gold embrittlement on this site and on the Internet. I estimate your produ

Poor reflow over gold plating

Electronics Forum | Tue Jun 28 18:20:49 EDT 2005 | russ

Matt, have you run a profile on this board? Just because it's .062" doesn't mean that any old .062" profile will work. We have .062" thick boards that almost nil for copper and other are utilizing 2 oz. layers internally. They require quite diffe

soldering to thick gold plating

Electronics Forum | Tue Jul 11 12:59:26 EDT 2006 | mattkehoe@sipad.com

We are trying to apply solder to boards with 80 microinches of electro plated hard gold. No components involved, just print 63/37 paste and reflow. The results are very poor on some boards, not so bad on others? Pictures at http://www.sipad.net/thick

soldering to thick gold plating

Electronics Forum | Wed Jul 12 11:26:12 EDT 2006 | flipit

Hi, I believe you have classic gold imbrittlement here. With 80 microinches of gold you are way over the limit. You can try to reflow longer time and at a higher temperature. The gold does not melt into the solder joint. The gold dissolves into

soldering to thick gold plating

Electronics Forum | Tue Jul 11 20:13:05 EDT 2006 | davef

We agree with Chunks. You need to turn-up the heat [slow the conveyor] because you have significantly changed the melting point of the solder alloy by adding so much gold. Relative to ENIG you should expect: * Similarly smooth surface, possibly a l

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