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Subject:	Re: Palladium PCBs
From:	Johannes Sivula <[log in to unmask]>
Reply To:	"TechNet E-Mail Forum." <[log in to unmask]>, Johannes Sivula" <[log in to unmask]>
Date:	Wed, 19 Aug 1998 09:47:34 +0300
Content-Type:	text/plain
Parts/Attachments:	text/plain (54 lines)

You wrote:
"
Because of a vendor mis-hap we recieved pcbs with palladium and not
tin plating. We use a 2% silver solder so it is a good match. We are
concerned with any long term effects i.e. corrosion.
Can some of you please respond with your experience
with palladium and pcbs. Don Fumia "

---------------------------------------------------------------------------
------------------------------------------------------------------
Hi,

We have made some preliminary trials with Palladium Process called "
electroless palladium "
by Atotech, with formic acid as the reducing agent.

I suppose there is also a process called " immersion palladium ".
Personally I think it gets too
thin and it is preferrably used as a activator in Ni/Au- processes, for
example.

Well, in our case it worked fine, we are pleased with solderability. We
have not made environmental tests
& other tests so far, personally I think that corrosion is not a problem,
because palladium is the most
noble metal and hence it is almost impossible to get it corrode.

The real problem of palladiumin our case is availibility/price fluctuation
in Europe.
Brs, Johannes

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