Patent ID: 8193085

Claim:
A method for assembling a semiconductor device comprising the steps of: providing a workpiece having an outline and a plurality of contact pads; providing a tape having a base sheet of thermoplastic material and first and second surfaces; a first polymeric adhesive film and a first foil of material different from the first polymeric adhesive film attached to said base sheet on said first and second surface sides, providing a partial thickness to said tape; a second polymeric adhesive film and a second foil of material different from the second polymeric adhesive film attached to said first foil on said second surface side; a plurality of holes through said partial thickness of said tape; a reflow metal element in each of said holes, adhering to said second polymeric adhesive film, locations of said holes, and thus said reflow metal elements in said holes, matching locations of said contact pads; removing said first foil from said first tape surface side, exposing said first polymeric adhesive film on said first tape side; placing said reflow elements of said tape in contact with said contact pads of said workpiece; supplying thermal energy to said workpiece and said tape sufficient to reflow said reflow elements and liquefy said thermoplastic base sheet; and cooling said workpiece and said tape to ambient temperature, thus attaching said tape to said workpiece.