Patent ID: 8460975
Filing Date: 2013-06-11
Classification: H01L

Abstract:
1. A reverse block-type insulated gate bipolar transistor manufacturing method, comprising: forming a MOS gate structure on one main surface of a first conductivity type semiconductor substrate; forming a second conductivity type collector layer on an other main surface; forming a second conductivity type separation layer, along a tapered side edge surface formed by etching from either one of the main surfaces to the other main surface, that links the two main surfaces with a layer of the same conductivity type, and is connected to the second conductivity type collector layer of the other main surface; and forming each of an emitter metal electrode on the MOS gate structure side and a collector metal electrode on the second conductivity type collector layer side, wherein when irradiating with a laser for a laser annealing after an implantation of ions into the second conductivity type separation layer and second conductivity type collector layer to form the second conductivity type collector layer and second conductivity type separation layer, the focal point is adjusted to a depth position from the upper portion to the central portion of the tapered side edge surface.