Electronics Forum | Thu May 30 08:51:45 EDT 2002 | davef
I assume the connector is like one used in PC104 that allows mating of boards together by inserting the pins extending from the connector on one board into the female portion of the connector on a second board. Who ever accepted this job is dopey.
Electronics Forum | Fri Apr 13 22:38:19 EDT 2001 | edylc
Hi , Could you be seeing the nickel under the gold plating because you are removing some of the Gold with the Kapton Tape....?? You mean , the adhesive properties of the kapton tape will cause the gold plating on the gold finger to be somehow peel of
Electronics Forum | Fri Apr 13 13:45:25 EDT 2001 | gsmguru
Just a guess-- Could you be seeing the nickel under the gold plating because you are removing some of the Gold with the Kapton Tape ? This should be easy to verify. Otherwise it sounds like things are pretty much covered.
Electronics Forum | Wed Aug 06 20:50:42 EDT 2003 | davef
Well, if it "keeps coming up", let's take a pass at keeping down. For: * Requirement that gold be removed from components, pads, etc. is J-STD-001C, 5.4.1 * Context of that requirement [J-STD-001C, 5.4.1] and 6 or 7 references are in IPC-HDBK-001.
Electronics Forum | Tue Apr 17 21:30:27 EDT 2001 | davef
The issue is on the table. Which is it? Are you ... * Loosing your gold plate when you remove the tape? [A tape test is a standard test for evaluating gold fingers. Check IPC-TM-650, test number wachacallit. Checkitaut.] OR * Putting tape o
Electronics Forum | Fri Jan 22 16:16:17 EST 2010 | stepheniii
My old boss bought some stuff to clean the lead off of gold fingers. At least that is what he thought it did. What it really did was remove the gold fingers. And quite well I might add. The short answer to your question is no. And if you replate mak
Electronics Forum | Thu May 05 09:46:04 EDT 2005 | davef
Board fab, Defects, Pad coatings, Gold black plague articles 1 Nick Biunno's article: http://www.nukcg.org/downloadfiles/Hadco%20on%20Immersion%20Gold%20failures.pdf 2 George Milad's article: http://www.circuitree.com/ct/cda/articleinformation/featu
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 | 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 | Tue Jun 13 08:17:06 EDT 2006 | davef
The solder alloy does not change based on the flux. Your potential for embrittlement is the same [providing the metal of the solders are the same] with either solder. We would guess the OA flux is [and drag tinning are] removing corrosion from the