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? >