Patent ID: 9653412
Date: 2017-05-16
CPC Classifications: H01L

Claim:
1. A method of manufacturing a semiconductor device, comprising the steps of: preparing a semiconductor wafer having a first wafer surface, a second wafer surface opposite to said first wafer surface, and a wafer outer peripheral end; forming at least a trench, an interlayer insulating film, emitter electrode, and electrode pad, the existence of said trench, interlayer insulating film, emitter electrode, and electrode pad forming a projection-depression shape on said first wafer surface of said semiconductor wafer; forming a resin member which has a resin outer peripheral end away from said wafer outer peripheral end and exposes said wafer outer peripheral end, on said first wafer surface of said semiconductor wafer, after forming said projection-depression shape; forming a recessed shape which has a recessed-portion outer peripheral end positioned 0.5 mm or more and 3.0 mm or less inside from said resin outer peripheral end, on said second wafer surface of said semiconductor wafer by partially removing said semiconductor wafer; performing a processing on said second wafer surface of said semiconductor wafer after forming said recessed shape; and removing said resin member after performing said processing.