Electronics Forum | Thu Jul 15 06:27:50 EDT 2010 | xps
Hi after an enviromental test 85C/85RH, for 3 months (powered), of an electronic assembly with edge finger tabs ENIG finished (nickel 5micron, gold 0.02micron), the nickel disappears completely under the gold (due to corrosion, I think). Does anyone
Electronics Forum | Thu Jul 15 13:27:42 EDT 2010 | xps
Thanks... anyway I confirm, the nickel disappear (verified by cross section)and a strange substance greyish above gold, covering the tabs after test. I don't know the reason for this phenomenon. I don't believe that with proper electrolytic nickel fi
Electronics Forum | Tue Nov 29 21:51:37 EST 2005 | wmeyers
I have a pin and sleeve assembly that utilizes a fusible link type of solder, Bi, Cd, Pb and Sn alloy. The pin is gold plated, the sleeve is copper alloy 725. I have had sporadic success with wetting of the sleeve during the reflow process. To improv
Electronics Forum | Mon Apr 28 09:59:04 EDT 2003 | davef
Your customer's question is reasonable. Soldering to nickel is not always a walk on the beach [can of corn, or whatever]. This issue is flux not solder. Your Sn63 will have plenty of strength, providing the solder connection is well formed. You s
Electronics Forum | Wed May 11 13:27:30 EDT 2005 | Sam Ho
i want to know which type of solder paste and reflow profile can support the solder pad with nickel but not covered gold on the pcb.
Electronics Forum | Sun Apr 18 14:26:36 EDT 1999 | Steve Gregory
| | Please visit our Web site, especially 'link page', to get some hint for roll typr of cleaning wiper for automatic screen printers. http://www.squeegee.co.kr | | | Idiot: I wouldn't visit your site if I had to start using toilet paper. Keep yo
Electronics Forum | Sun Apr 18 19:16:28 EDT 1999 | Wayne Bracy
| | | Please visit our Web site, especially 'link page', to get some hint for roll typr of cleaning wiper for automatic screen printers. http://www.squeegee.co.kr | | | | | Idiot: I wouldn't visit your site if I had to start using toilet paper. K
Electronics Forum | Sun Apr 18 19:18:28 EDT 1999 | Wayne Bracy
| | | | Please visit our Web site, especially 'link page', to get some hint for roll typr of cleaning wiper for automatic screen printers. http://www.squeegee.co.kr | | | | | | | Idiot: I wouldn't visit your site if I had to start using toilet pap
Electronics Forum | Mon Oct 27 20:01:00 EDT 2014 | rangarajd
Hello, We are facing solderability issues on a particular lot of board. THe Nickel thickness measured with an XRF is around 400 U inches. Spec calls out for 130 u inches Nickel and 3 - 5 U inches gold over it. Assuming there is no porosity on the g
Electronics Forum | Thu Oct 30 18:10:19 EDT 2014 | hegemon
Rather than asking why, maybe the better response is to reject the PWBs and have them re-fabricated correctly? Of course circular reasoning tells me that the reason for your issues is that you have 3x the amount of nickel beneath the gold. I wish I
