Electronics Forum | Fri Jul 10 07:34:00 EDT 2020 | elijah
From the poor bonding strength of the board, the surface quality problems of the board are divided into: 1. The cleanliness of the board surface; 2. The problem of micro graphite (or surface energy) on the surface. PCB circuit board proofing Youke bo
Electronics Forum | Tue Nov 28 21:07:44 EST 2000 | Alvin K
Gold is porous and spots on gold plated PCBs is one of the drawbacks of using gold as a solderability protector. Base Nickel exposure seems to be the cause of this and is aggravated when the gold thickness is less than what it should be. I agree with
Electronics Forum | Fri May 28 16:30:39 EDT 1999 | JohnW
| Yes l know this problem keeps cropping up on the forum but l've missed some of the follow-ups. | | Our problem is that the lifting only occurs on 3% of production so actually detecting an improvement is difficult. We're actually having to inspect
Electronics Forum | Thu Apr 07 02:38:20 EDT 2011 | aungthura
I didn't know the difference for BGA. We found solderability probelm as show in attach.Then, we called to PCB maker and they said that it could be caused because of PCB finishing. Do you agree this probelm was happend because of PCB finishing? Unfor
Electronics Forum | Mon May 12 12:58:07 EDT 2014 | emeto
Hello all, I have a diode(gold plated)on some assemblies that gives me a a hard time. The paste is wetting too good and climbs the lead of the component and touches the body which is a defect. I just wonder what if there is a way to heat the board e
Electronics Forum | Thu May 09 15:56:33 EDT 2002 | stownsend
We are using NC. Paste doesn't seem to have an effect on the solderability on a bad batch of ENIG. When ENIG has gone bad, throw the board out.
Electronics Forum | Fri May 03 18:10:17 EDT 2002 | stownsend
Okay, here goes another thread about gold plating. I have been using gold plated PCB's for about two years now, with mostly very good results. The main reason I started using gold in the first place was because it is flat, solder wets to it nicely,
Electronics Forum | Wed Feb 07 21:51:49 EST 2001 | davef
You're correct that some folk have used microns and other folks have used u" when discribing their ENIG specification. It's likely the the micron folks misquoted their units and it's arguable that participants in the forum should have taken them to
Electronics Forum | Fri May 10 13:52:46 EDT 2002 | pjc
FYI: not all OSP are created equal. I have had expierence, both good and bad w/ OSP boards. To qualify the vendor I would take a bare board and run it thru my oven twice on a reflow profile then flux it with NC flux and run it thru the wave solder fo
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