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| From [log in to unmask] Mon Apr 28 17: |
07:57 1997 |
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Michael,
I check with our local glue guru on repairable bonding film.
Here is his somewhat skeptical answer.
Regards,
Dave Sullivan
Rockwell Collins, Inc.
[log in to unmask]
______________________________ Forward Header __________________________________
Subject: Re: Repairable bonding film wanted...
Author: pmcarter at po5
Date: 4/18/97 2:17 PM
Dave:
Suggest he contact reps from Alphametals, 3M, and AI Technology
to discuss thermoplastic sheet adhesives. They are "THEORETICALLY"
"INFINITELY" (very loosely defined) reworkable. Strengths are good,
though not in the epoxy, polyimide, cyanate ester range Usually
heatsinks require more of a balance of strength and stress absorbtion
than brute strength anyway. Thermoplastic sheet adhesives are
available "doped" with fillers to enhance electrical conductivity,
thermal conductivity, or both.
Downside: must fixture to apply uniformly distributed pressure
during melt and set cycles, not always trivial, especially in
post-assembly operations.
Marc Carter
______________________________ Reply Separator _________________________________
Subject: Repairable bonding film wanted...
Author: ddsulliv at po6
Date: 4/18/97 2:06 PM
Reworkable glue...hmmm
______________________________ Forward Header __________________________________
Subject: Repairable bonding film wanted...
Author: [log in to unmask] at ccmgw1
Date: 4/18/97 9:53 AM
Gents,
I am looking for a bonding film to laminate PCB's to heatsinks... No big
deal there, but I need it to be reworkable!
Ideally, I would like to remove the PCB from the heatsink while salvaging
both, including the components.
My equipment is Class 3 (airborne). So basically I want a solution that
holds on REAL TIGHT during use, but comes apart real easy when I want it...
Suggestions?
Thanks,
Michael Lang
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