Athar Kaludi wrote:
>
> I am looking for the thru hole plating specially Electroless Nickle
> method. [without Palladium]
> I also need to TIN Plate the PCBS. help needed.
Just for curiosity and first of all can you tell me where/how did you
know about PTH 'electroless nickel'?
Now to clarify, from what i know, there is no such thing as electroless
nickel to do PTH. Check the previously discussed sources:
http://nr.stpi.org.tw/ejournal/proceedingA/v23n3/365-368.pdf
http://books.google.com/books?id=g9Q8RekeKaAC&pg=SA30-PA1&lpg=SA30-PA1
But i remember similar compositions from when i searched for a method
that made electroless copper first and then electroplating in the same
bath. I found uspo 6329072 and 20070071904 in my notes, seems related to
your question and related to the reduction agents of what i was
searching for, but it seemed useless and i don't know nothing about it
(don't even know if it plates on resin surface).
I am just a curious, no chemistry knowledge, i used a PTH setup and also
wish one for myself, but wanting it without the high price or the
maintenance of commercial machines is still pushing it further, i made a
big effort to find the breakthroughs i wish for a trouble free machine
for me. My advice is, the only efficient, practical, long live and low
maintenance chemistry for an homebrew is paladium, better if is the non
acid (NaCl) version, with cleaner/conditioner and the copper accelerator
post-dip. But yes it has a difficult to 'homebrew' copper electroplating
(i found a answer to this) and electroless avoids it. Electroless in the
industry is only bad on hazard/environmental issues. But for the
homebrew besides the time, go to the MG chemicals site and watch the
videos of their electroless kit. Found the little man in the middle of
all those tanks and chemicals? Made you laugh? Its what i think about
electroless for the homebrew.
About the tin plating, is it immersion or electroplated tin? You have
the sulphate (tin oxidizes), the fluoroborate and sulphonic (more
controllable) mixes for both types, with thiourea or electrical
current.
Sim�o