Electronics Forum | Fri May 02 09:49:19 EDT 2003 | tommyg_fla
3NaH2PO3 + H2SO4 + 2H2 + Ni^0 Potassium is co-deposited with the nickel, as follows: H2PO2^- + Hads => H2O + OH^- + P 3H2PO2^- + P => H2PO3^- + H2O + 2OH^- What is Hads?
Electronics Forum | Tue Sep 19 14:39:55 EDT 2006 | ppcbs
I have some Engelhard E-74 Potassium Gold Cyanide and related chemicals I use to make a small high concentrate plating bath for swab plating. I lost my bath mixture instructions and find that Engelhard no longer supports this product. Does anyone h
Electronics Forum | Wed Jul 17 03:36:00 EDT 2002 | robbied
Answers are: *Mainly copper and potassium. *it looks like a soft growth. *customer will not accept this, hence the returns. These boards are either reworked or scrapped. *Flux is not an issue. *The cleaning process has been found to be the cause of t
Electronics Forum | Tue Mar 20 09:31:56 EST 2001 | PeteC
I dunno.: e�lec�tro�lyt�ic Of or relating to electrolysis. Produced by electrolysis. Of or relating to electrolytes. e�lec�trol�y�sis Chemical change, especially decomposition, produced in an electrolyte by an electric current. Destruction
Electronics Forum | Thu May 31 21:45:48 EDT 2012 | davef
rsthompson ... if you're talking about bare boards IPC-5701, Users Guide for Cleanliness of Unpopulated PBC, Table 8 ||Bare board final surface finish Ions||Hot air solder level||OSP over copper||Gold over nickel Chloride||0.75 ug/cm^2||0.75 ug/cm^2
Electronics Forum | Tue May 08 15:05:08 EDT 2001 | davef
It�s reasonable to want to understand this strange looking fabrication, before moving on to other issues. Before moving on to that, tell us more about your thinking the silicon being from the BGA package. What kind of plastic package is this? Desc
Electronics Forum | Fri May 21 12:24:21 EDT 1999 | KA Stillings
I normally handle the soldering issues for this facility but a question was asked of me -- What the H@## is this stuff and what is causing it? Was wondering of I could get some input from any Guru on plating issues. Need info ASAP!!!!!!!!!!!!!!!!!!!
Electronics Forum | Thu Apr 24 20:39:01 EDT 2003 | davef
3NaH2PO3 + H2SO4 + 2H2 + Ni^0 Potassium is co-deposited with the nickel, as follows: H2PO2^- + Hads => H2O + OH^- + P 3H2PO2^- + P => H2PO3^- + H2O + 2OH^- Nick Biunno gives a very short, over simplified summary: "Everybody looks at the nickel, b
Electronics Forum | Tue Oct 09 21:45:21 EDT 2012 | davef
Hi Bob Ideas to consider are: * Use your handheld XRF * Swab vinegar on the copper and watch it brighten * Use the following procedure Nearly all copper minerals can be dissolved by melting with a mixture 1:2.5 of ammonium chloride and ammonium nit
Electronics Forum | Thu Sep 30 03:37:26 EDT 1999 | Brian
| We are all faced with increasing interconnect density in all we do. This means smaller everything, especially components and that which they are mounted upon but, hopefully, without smaller minds and thoughts. It all demands more process control an
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