Patent ID: 8440521
Filing Date: 2013-05-14
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device having a p-type field effect transistor and an n-type field effect transistor, said method comprising: forming an interface insulating layer and a high-permittivity layer on a substrate in the stated order; forming a pattern of a sacrifice layer on the high-permittivity layer; forming a metal-containing film containing metal elements therein on the high-permittivity layer in a first region where the sacrifice layer is formed and a second region where no sacrifice layer is formed; introducing the metal elements into an interface between the interface insulating layer and the high-permittivity layer in the second region by conducting a heat treatment; and removing the sacrifice layer by wet etching, wherein in the removing the sacrifice layer is etched easily more than the high-permittivity layer; wherein the step of forming the pattern of the sacrifice film includes: forming a pattern of the metal film; and nitriding a surface layer of the metal film.