Electronics Forum | Wed Jul 31 13:19:38 EDT 2013 | anvil1021
Does anyone know how to test for hard gold on a PCB? We are in a challenging situation with a PCB provider and we need some objective evidence other than wire bond failure to present to them. Any comments could help ....Thank you Anvil
Electronics Forum | Fri May 03 16:06:44 EDT 2013 | hegemon
To be short, no change in profile is going to get you through this. As I recall the point of hard gold is to retard the wetting process, so no surprise here. For example a connector might have hard gold plating at the mating surface, but not at t
Electronics Forum | Mon May 20 15:43:01 EDT 2013 | ngotranbestek
Hi I meet problem by PCB with diameter 300cm and thick 6mm i used tin-lead with profile normal, soak time 60-90 sec, Temp peak is 220 degree C, But solder see not good, not shiny. Any body recomend help me to fix this problem for Hard gold playing.
Electronics Forum | Wed Dec 28 21:18:12 EST 2005 | davef
You don't TS bond gold wire to nickel [of ENIG] for the same reason that you don't TS bond gold wire to hard gold. [Nickel or maybe cobalt is used to harden soft gold.] Together nickel and gold produce unreliable bonds. Look here: * http://www.smta.
Electronics Forum | Fri May 24 09:16:36 EDT 2013 | grahamcooper22
you need to reduce your time above liquidus to as low as you can...maybe 10~30 secs to allow the solder to wet to the gold but minimise the amount of gold that is dissolved into the solder joint...try also reducing the peak temp to 200~210 deg C. Thi
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
Electronics Forum | Mon May 06 12:20:09 EDT 2013 | davef
Gold in solder alloys can be brittle. We always used to talk about keeping gold LT 3% in order to avoid embrittlement. Some military contracts require removal of gold from soldered contacts. Adding gold to a solder alloy that you're familiar with wi
Electronics Forum | Thu Dec 29 03:57:16 EST 2005 | sparrow
Hello Chris, To be honest, it's hard to believe you could not bond to ENIG at all. Yes, the gold layer is thin and hard, but it just narrows the process window and does not make the bonding impossible. I say this, because we have been using TS gold w
Electronics Forum | Thu Jun 30 20:17:19 EDT 2005 | davef
Matt: What thickness of hard gold was applied to your customer's boards?
Electronics Forum | Fri Feb 28 11:02:06 EST 2020 | slthomas
I'm not 100% sure which type of gold you're asking about, but if you're talking about hard gold plating, I think the most common use is to provide a durable surface for things like membrane switch contacts because it resists abrasion and other mechan
