Electronics Forum | Wed Dec 28 16:03:53 EST 2005 | Chris
I have lots of experience with thermosonic gold ball bonding. You can read the literature and you will probably find some papers that say you can do it. I have never been able to do it. We gold ball bond all day long with little problems at all bu
Electronics Forum | Fri Apr 13 21:02:19 EDT 2007 | Sam
Anyone experience using SnPb wire to gold plated ICs? I have tried to solder the SnPb wire to the gold plated ICs lead, but the surface finishing is dull. Can anyone explain that to me? Why it is not shinny surface? Any recommendation?
Electronics Forum | Mon Apr 16 09:12:23 EDT 2007 | davef
Standard for appearance: J-STD-001 and IPC-A-610 committees eliminated the requirement that solder connections be "bright and shiny". Certain solderability protections; such as Au, NiPd, NiPdAu; can affect the surface texture of a solder connection,
Electronics Forum | Tue May 19 10:23:06 EDT 1998 | Mike C
| Howdy Richard, | Welcome to the club! I now dub thee a full fledged member of the "Spotty Gold Finger and Bleeding Ulcer Society"...or SGFBUS for short... (GRIN) | I know it's not funny to be in that position, but there's so many different places t
Electronics Forum | Tue Mar 21 20:25:30 EST 2000 | Dave F
John: What�s the matter? Free gold � good thing for you, bad thing for your supplier. :^) Pre-tinning of gold plated leads is important to: � Prevent gold embrittlement of the solder joint � Determine if the leads are solderable prior to assembly (
Electronics Forum | Mon Feb 27 09:09:36 EST 2006 | davef
Silver on your copper or brass part is a solderability protection. The silver diffuses into the solder and you solder to the base metal, either the copper or brass in your case. Soldering to copper is well known. The issues are soldering to brass
Electronics Forum | Mon Jun 03 21:02:42 EDT 2002 | ianchan
Ok let's start backwards abit, and move progressively from a common understanding. So this originator thread-slinger bloke is asking for advise to Au plate his connector pads. We have a cuppa ideas bounced around which leads to my ignorance based q
Electronics Forum | Thu Nov 30 09:51:53 EST 2006 | Loco
Thanks for the replies, it is getting clearer now. We called a PCB supplier and acted if we didnt know what was what, he actually told us its all the same, chemical, flash, immersion, all the same... It is now getting clearer why we are sometimes ge
Electronics Forum | Tue Dec 10 05:03:58 EST 2002 | praveen
We are having solder fillet finish issue. The solder looks like rough solder on the connector leads .The plating of the leads is Nickel (99.9% purity) and the PCB plating is imersion gold. I have tried fine tuning my reflow profiles an have used N2 i
Electronics Forum | Thu Mar 30 08:38:58 EST 2006 | Dan
We have this panel that is Gold Flash. Am I correct in assuming this is technically a lead-free panel then? We are running a WS paste, and the QFN28 has balls of solder instead of a fillet. My Max temp is 216, and the TAL was between 52-57 secs with
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