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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