Carey,

I'm curious......are you taking issue with the naming of the process or the
process itself??

If you think IWT is not a good finish process, please elaborate.  I am in
the process of qualifying
it as a potential replacement for OSP and would like to get all the
data/opinion I can.

Regards..........DT




At 09:34 AM 2/10/00 -0800, you wrote:
>Every time I see "White Tin" as a process, I get queezy.
>
>For the record, white tin is a metallurgical form of tin.  The company (I'll
>not name) that is trying to capitalize on using it as a process name has
>bastardized terminology.  Of course, your other choice is gray tin which is
>unstable with poor properties and forms at low temperatures.  So all of you
>are using white tin, whether you know it or not.  Otherwise, you'd be out of
>business.
>
>I'm sorry...  I just had to get it off my back.
>
>Carey
>
>-----Original Message-----
>From: Jorge A Rodriguez <[log in to unmask]>
>To: [log in to unmask] <[log in to unmask]>
>Date: Thursday, February 10, 2000 8:07 AM
>Subject: [TN] White Tin PWB
>
>
> >We are about to start using immersion tin PWBs (white tin) ,  the boards we
> >currently use are HASL and OSP. Are there any changes with the SMT process,
> >component termination finish or reflow process when white tin boards are
>used. I
> >know that white tin provides a better pad finish than HASL, similar to OSP,
>but
> >wihout the organic coating.  Any comments.
> >
> >
> >Any iformation would be appreciated.
> >
> >
> >Jorge Rodriguez
> >Process Engineer
> >Conexant Systems Inc
> >
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