Path: utzoo!attcan!uunet!know!samsung!emory!rsiatl!jgd
From: jgd@rsiatl.UUCP (John G. DeArmond)
Newsgroups: sci.electronics
Subject: Re: Conducting Adhesive
Message-ID: <4220@rsiatl.UUCP>
Date: 8 Oct 90 05:40:09 GMT
References: <1990Oct7.155829.3917@mccc.uucp>
Organization: Radiation Systems, Inc. (a thinktank, motorcycle, car and gun works facility)
Lines: 27

pjh@mccc.uucp (Pete Holsberg) writes:

>What's a good conducting adhesive that I can use to stick a heat sink to the
>top of a large IC?

I have a nice little kit here from Thermalloy, Inc called a "Thermalbond
4951".  The kit contains a jar of green epoxee goop and a smaller 
bottle of activator liquid.  It mixes at the ratio of 100 parts of
resin to 7.5 parts of hardner (got that? :-) and sets up in 24 hours
at ambient or 30 minutes at 130 degrees C.  It also recommends a post
cure of 4 days or 4 hours at 200 degrees F.  I cure it for about
an hour in an oven at about 250 degrees and it works well.  It sets
up to a bright green, very hard and very conductive mass.

I bought the stuff surplus at a hamfest for $3.00 a kit.  It has a shelf
life but the fact that mine is several years out of date does not 
seem to affect its performance.  The address on the box for Thermalloy is:

PO Box 340839
2021 West Valley View Lane
Dallas, TX 75234
214 243 4321
-- 
John De Armond, WD4OQC  | We can no more blame our loss of freedom on congress
Radiation Systems, Inc. | than we can prostitution on pimps.  Both simply
Atlanta, Ga             | provide broker services for their customers.
{emory,uunet}!rsiatl!jgd|  - Dr. W Williams |                **I am the NRA**