Patent ID: 7701071

Claim:
A tape for use as a carrier in semiconductor device assembly comprising: a base sheet of polymer material having first and second surfaces; a first polymeric adhesive film and a first foil of different material attached to said base sheet on both said first and said second surface sides, providing a partial thickness to said tape; a second polymeric adhesive film and a second foil of different material attached to said first foil on said second surface side of said base sheet; a plurality of holes through said partial thickness of said tape wherein each hole having a depth extending through said base sheet and both said first foil and said first polymeric adhesive film on both said first and second surfaces of said base sheet, exposing a surface of the second polymeric adhesive film; and a reflow metal element in each of said holes, said reflow metal element adhering to said exposed surface of said second polymeric adhesive film, wherein said reflow metal elements are solder balls.