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From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 28 Aug 2001 22:32:44 EDT |
Content-Type: | multipart/alternative |
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Hi Joseph!
We build assemblies that use adhesive preforms for just the reasons you've
stated, and process them exactly like you do...
The vendor is AbleStik at: http://www.ablestik.com/
I hope this is not the company that you're talking about that's raised their
prices so much...
This preform that we use bonds two assemblies to a aluminum heatsink, one to
each side, and this is the adhesive pre-form that is called out by our
customer...we can't use anything else...sounds like a change of scope if the
prices have increased a bunch!!!
-Steve Gregory-
> 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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