The immersion white tin we have seen requested is Omikron by Florida CirTech
and I have heard of Dexter and Alphametal producing an immersion white tin.
Supposedly assemblers are moving to the IWT because it is more reworkable
than OSP, the surface co-planarity is good and so is the solderability.

We're trying to determine where the industry is going, is anyone else seeing
this happen?



On Thu, 1 Jun 2000 13:38:45 -0700 , Brooks Bill wrote:

>  This is going to date me... I used to manufacture boards in my youth, we
>  used electroless tin as a coating for boards where heavy hydro-squeegee
>  solder coating was not required... Is this what you mean by white tin
>  immersion?
>  -Bill Brooks
>
>  -----Original Message-----
>  From: [log in to unmask] [mailto:[log in to unmask]]
>  Sent: Thursday, June 01, 2000 12:18 PM
>  To: [log in to unmask]
>  Subject: [TN] Immersion White Tin
>
>
>  I hope to generate some discussion on this subject, since there wasn't
much
>  from last weeks questions on immersion white tin...
>
>  We (as a PCB fabricator) have had several inquiries about immersion white
>  tin from our customers, but we don't see any of the large OEM's making a
>  move towards it.
>  Any opinions out there?
>
>
>
>
>
>
>
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