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Date: | Mon, 13 May 96 10:32:13 cst |
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Good Morning TechNet!
Norm - We have been using heat sealing with desiccant packs for some
period of time now and not had any issues with solderability. Our
finishes are primary hot solder dipped tin/lead. The heat sealing of
plastic parts to prevent "popcorning" is being used by several
companies I know with little to no problems concerning solderability.
I am curious on what the details are surrounding the "problem" heat
sealing examples. Are they isolated cases?
Dave Hillman
Rockwell Collins
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Subject: GEN: Heat - Sealing?
Author: [log in to unmask] at ccmgw1
Date: 5/10/96 6:56 PM
It seems to be generally accepted that storing PWB's in a heat sealed
bag reduces solderability, can that same concern be extended to stored
components?
What about components with solderable plating other than tin-lead? Is
there any solderable plating that is not affected adversely by heat sealing
the storage bag?
Were the negative rumors about heat sealing started by some disgruntled
heat seal manufacturing employee?
Since nothing turned up in a search of the achieves, I'm interested in
any comments.
Norm Dill
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