Electronics Forum: gold brush plating (Page 1 of 63)

Poor reflow over gold plating

Electronics Forum | Wed Jun 29 16:25:51 EDT 2005 | mattkehoe

When discussing this with the customer he said that his vendor recommended a hard gold plating finish on the board due to the BGA. I said "hard gold"??? And he said yes, hard gold. Turns out the boards were plated with hard gold, not ENIG. Thank

Why gold plating on PCB?

Electronics Forum | Fri Feb 28 01:08:33 EST 2020 | sarason

Back in the 50's, 60's and 70's gold plated boards were all the rage for high reliability. test equipment, milspec etc. Nowadays only edge connectors are gold plated. Immersion plated gold is also used but it doesn't last the distance like gold plate

Why gold plating on PCB?

Electronics Forum | Fri Feb 28 00:42:40 EST 2020 | luciano_zhang

What is the use of gold plated boards?

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

Why gold plating on PCB?

Electronics Forum | Fri Mar 20 05:55:24 EDT 2020 | yuaanliie

The gold plating on PCB has a 40% higher resistivity, and it is much more expensive. So gold is not used instead of copper for conductors. Last month I purchased some PCB from Cplfpc and Greatpcb.

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 | Thu Jun 30 20:17:19 EDT 2005 | davef

Matt: What thickness of hard gold was applied to your customer's boards?

Poor reflow over gold plating

Electronics Forum | Thu Jun 30 21:55:33 EDT 2005 | Mason Hughes

Hi, In response to reading height or gold thickness, I can do that masonhughes@sbcglobal.net

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 11:26:12 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

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