Patent ID: 6780679
Filing Date: 2004-08-24
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device having: a semiconductor die; a die pad on which said semiconductor die is mounted; a plurality of leads arranged around said semiconductor die; a plurality of wires for electrically connecting said semiconductor die and said leads; and a plastic package for encapsulating said semiconductor die, said die pad, said plurality of leads, and said plurality of wires,the method comprising the steps of: (a) press-molding a metal sheet to prepare a lead frame on which a pattern including said die pad and said plurality of leads is repeatedly formed and a terminal is formed on a surface of each of said plurality of leads so as to protrude in a direction perpendicular to said surface; (b) mounting said semiconductor die, on said die pad formed on said lead frame, and connecting said semiconductor die and respective parts of said leads by wires; (c) preparing a molding die having an upper die and a lower die, coating a surface of said lower die with a resin film, then mounting said lead frame on said resin film, and thereby contacting said resin film with said terminal formed on each surface of said leads; (d) sandwiching said resin film and said lead frame between said upper die and said lower die to push a tip portion of said terminal into said resin film; (e) injecting a resin into a gap between said upper die and said lower die to form a plurality of plastic packages, in which said semiconductor die, said die pad, said leads, and said wires are encapsulated and said terminal protrudes to the outside, and thereafter separating said lead frame from said molding die; and (f) cutting said lead frame to obtain pieces of said plurality of plastic packages.