Patent ID: 7449367

Claim:
A method for producing a semiconductor device, the method comprising: (a) a step of laminating directly to one side of a metal sheet an adhesive film for semiconductor use, (b) a step of processing the metal sheet to give a wiring circuit, (c) a step of electrically connecting a semiconductor die onto an exposed surface of the wiring circuit, (d) a step of molding the semiconductor die and the exposed surface of the wiring circuit with a molding compound, and (e) a step of peeling off the adhesive film for semiconductor use from the wiring circuit and the molding compound, wherein said adhesive film for semiconductor use comprises a support film and a resin layer A formed on one side or both sides of the support film, the 90 degree peel strength between the resin layer A and the metal sheet prior to the processing of the metal sheet laminated with the adhesive film for semiconductor use to give the wiring circuit being 20 N/m or greater at 25° C., and the 90 degree peel strengths, after molding with the molding compound the wiring circuit laminated with the adhesive film for semiconductor use, between the resin layer A and the wiring circuit and between the resin layer A and the molding compound, both being 1000N/m or less at at least one point in the temperature range of 0° C. to 250° C., and wherein the resin layer A, which has adhesion, is formed on one side of the support film, and a resin layer B having no adhesion and an elastic modulus at 230° C. of 10 MPa or greater is formed on the opposite side thereof.