Hi, Joseph,

In my former POW (place of work), we used Abelfilm for exactly the
application you have using the methods you describe. The film wasn't too
cheap either, but if it isn't them you are now seeking to replace, give
them a try. We had our material pre-cut, which accounted for much of the
cost given the volume we used, but you cut your own ... .

It comes in a variety of thicknesses and sheet sizes, so you should be able
(ha-ha) to find what you need. They're on the Web somewhere, but can't find
their address off-hand.

Good luck.

Pete Duncan




                    "Kane, Joseph"
                    <joseph.kane@BAESY        To:     [log in to unmask]
                    STEMS.COM>                cc:     (bcc: DUNCAN Peter/Asst Prin Engr/ST
                    Sent by: TechNet          Aero/ST Group)
                    <[log in to unmask]>         Subject:     [TN] Sheet Adhesive Suppliers


                    08/28/01 11:53 PM
                    Please respond to
                    "TechNet E-Mail
                    Forum."






Our supplier for epoxy sheet adhesives has significantly increased
prices, and I'd like to look at alternative sources.

We use this stuff for bonding ladder-style aluminum heatsinks to
PWB's.  The types that we use are either glass cloth or Kapton
film covered with epoxy, total thickness from .004" to .009".  We
cut material on a programmable x-y machine that looks a lot like
a plotter, but with a blade instead of a pen.  Cure is with heat and
pressure, either in a fixture and oven, or with a vacuum bag and
platen press.

We like dry film better than screen printing or dispensing liquid
adhesive because it's a lot less messy, bondline thickness is very
repeatable, material doesn't squeeze out when fixtured, and there
is no smear when aligning the heatsink with the board.

Anyone use Arlon materials for something like this?  Other sources?

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