Ken or any other Technet guru..
     I am not a total novice in this business, but I
  don't understand where you would use a temp.
  soldermask. In all the application that I have been
  involved in, I worry about soldermask adhesion. Soooo,
  would someone explain so that I might become a little
  smarter before this old mind starts to head toward
  senility ??? Oh, am I already there?? Hey, thanks
  in advance. Have a great day.
                                  Regards,
  Bob Vanech                                 Bob
  BVAN Enterprise
> We have an application where we need to apply temporary solder mask prior
> to a high temp bake in preperation for wave solder. These are polyimid
> boards and we bake them at 125C for 12 hours prior to wave solder. We try
> to wave solder them as soon as they cool to ambient so applying mask after
> bake is out of the question.
>
> We have two different masks we currently use that are water-soluble.
> Neither one comes off very well in the water wash and one of them leaves a
> residue/stain due to the high temp bake.
>
> Do any of you have a source for a temporary solder mask that can hold up to
> this temp/time and still be removed easily without residue (preferably with
> water)?
>
>
> Thank you,
>
> Ken Bloomquist
> Sr. Principal Process Engineer
> PRIMEX Aerospace Company
> P.O. Box 97009
> Redmond, WA 98073-9709
> http://www.primextech.com
>
> Ph:   425-885-5000
> FAX: 425-882-5786
> [log in to unmask]
>
> Northcon/2000, Chairman of the Board
> http://www.northcon.org
>
> Electronics Manufacturers Association (EMA), Vice President
> http://www.ema-wa.org
>
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