Bev and others,
I've worked with Pd in one way or another, starting with hybrids in the
'60's but never thought about solderability over time. What is the "shelf"
life of Pd compared, say, with SnPb? Know the question is too general but
any guesses?
Earl
----- Original Message -----
From: "Bev Christian" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 09, 2002 7:59 AM
Subject: Re: [TN] Palladium Leads
> Henry,
> Back in the mid 90's when these parts (TI palladium plated) were
introduced
> in the company I worked at then, we had some teething problems. But with
> some profile manipulation and training of operators we did not have any
> issues (Of course there was lab testing in the background). The training
> had to be done because there will be more wetting angles closer to 90
> degrees than they are used to.
>
> One other very important thing, this finish and I suppose other palladium
> finishes, is/are finicky when it comes to fluxes. Some no-cleans work,
> others don't. We were lucky our old standard fluxes - Kester R243 solder
> paste and 923 and 924FB wave solder fluxes worked well. Others didn't.
>
> And finally, how old are your parts and what conditions have they been
> stored in? I'm sure others will come up with other good questions and
> hopefully a few hints for you.
>
> regards,
> Bev Christian
> Research in Motion
>
> -----Original Message-----
> From: Henry Rekers [mailto:[log in to unmask]]
> Sent: May 8, 2002 8:33 PM
> To: [log in to unmask]
> Subject: [TN] Palladium Leads
>
>
> Has anybody out there experienced non-wetting problems with no-clean
> solderpastes on parts that have palladium coatings on the leads.
> Specifically, have you had this problem with Texas Instruments parts?
>
> Thanks.
>
> Henry J. Rekers
> Manufacturing Engineer
>
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