Hi Bill,
Most flex materials will withstand 125C continuous so you should have no
issues. What is the point of this? If it is to drive out moisture before
assembly all you are doing is warming the water. Regards Steve Kelly
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bill Dworak
Sent: April-29-08 2:46 PM
To: [log in to unmask]
Subject: [TN] Baking Flex boards
I would appreciate some input on a subject that I was just hit with today. I
am being asked if my customer baked flex boards for 10 hours at 150F would
there be any chance of long term reliability issue? The board is what I
would call standard issue stack up for a flex board nothing wild polyimide
material with a FR4 Stiffener 4 layers, no fine traces .004/.004. HAL
(leaded) surface finish.
I had an issue several months ago with some rigid boards that where being
baked for long periods of time but that was on the assembly side of issues
not durability.
Any particular issues that might come from the baking? Any input is
welcome.
Bill Dworak
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