Patent ID: 6391680
Filing Date: 2002-05-21
Classification: H01L,Y10T

Abstract:
A method for attaching a semiconductor die having an active surface to a portion of a lead frame having a plurality of lead fingers thereon, at least one lead finger having an attaching surface, said method comprising:selecting a polymer adhesive from a group of polymer adhesives comprising tacky and compliant polymer adhesives at room temperature, said polymer adhesive including a first material from a group of copolymers that includes isobutyl acetal diphenol copolymer and a second material that is from a group of metal oxides; applying said polymer adhesive in one of at least one line of polymer adhesive and a plurality of beads of polymer adhesive on one of at least a portion of said active surface of said semiconductor die and the attaching surface of at least one lead finger; maintaining said polymer adhesive at room temperature; urging said active surface of said semiconductor die with said attaching surface of said at least one lead finger of said plurality of lead fingers of said lead frame while at room temperature for attaching the attaching surface of said at least one lead finger of said plurality of lead fingers of said lead frame and said active surface of said semiconductor device.