Our std at BAE Systems was 90 deg C (194 F) for 1 hour, though since I have
achieved greater enlightenment, I would suggest that you have your boards
packed by your fab house in sealed bags with desiccant, you keep them in a
dry cabinet and that you don't open them until needed on the line. That way
you won't have to pre-bake them, and they won't have to go through an
avoidable thermal excursion.

Peter Duncan




                    Rick Howieson
                    <RHowieson@DELTAGRO        To:     [log in to unmask]
                    UPINC.COM>                 cc:     (bcc: DUNCAN Peter/Asst Prin Engr/ST
                    Sent by: TechNet           Aero/ST Group)
                    <[log in to unmask]>          Subject:     [TN] Pre-bake


                    11/20/01 01:41 AM
                    Please respond to
                    "TechNet E-Mail
                    Forum."






What is the recommended pre-bake of multilayer boards prior to insertion
and
wave. 221F for 1hour??? Or would this be a little extreme?
Thanks,
Rick

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