Guys (and girls),

Can anyone tell me whether or not polyimide boards need to be pre-baked
before processing thru nitrogen reflow for solder melt?  We are doing it,
which of course means added expense.  Is it really necessary?  We bake at
110 C for four hours.  Is there evidence which suggests that it is
necessary.

Thanks for any replies,

Bill Mengers
Northrop Grumman Corp.
Baltimore, Md.

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