We do this very thing with most of our components needing thermal
attachment.  We inject the material through a hole in the board using a
syringe.  We use a thermally conductive polyurethane and it has a working
life of 2 hours.  It will cure at room temp. (24 hrs) or 30 minutes at 100
deg. C:
                Uralane 7760
                Vantico Adhesives and Tooling
                5121 SanFernando Rd West
                Los Angeles, CA  90039
                Cage Code #99384

-----Original Message-----
From: Alain Savard [mailto:[log in to unmask]]
Sent: Wednesday, March 21, 2001 10:13 AM
To: [log in to unmask]
Subject: [TN] Thermally conductive adhesive


Hello Oh Wise Ones, (and hello to the others TechNetters too)

We need to put some thermally conductive adhesive under a component. There
is a hole through the boards to allow some material to flow through, but the
adhesive must NOT be electrically conductive. We've tried the Output 384 by
Loctite, but it hardens too fast and doesn't flow enough.

For technical reasons, we cannot apply the adhesive before the boards is
assembled.

Any ideas would be welcome.

Thanks,

Alain Savard, B.Sc.
Chemical Process Analyst
CAE Montreal
e-mail: [log in to unmask]

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