Patent ID: 8062973
Filing Date: 2011-11-22
Classification: H01L

Abstract:
1. A semiconductor device manufacturing method for forming a MISFET, comprising: depositing metal and forming a metal film on a source-drain diffusion layer composed of silicon as a principal ingredient formed in a semiconductor substrate and on an element isolating insulation film formed in the semiconductor substrate in order to be adjacent to the source-drain diffusion layer; conducting first heating processing at a first heating temperature in an inert atmosphere under a first pressure in a first process chamber, and thereby causing reaction between silicon in the source-drain diffusion layer and the metal on the source-drain diffusion layer to silicide an upper part of the source-drain diffusion layer and form a silicide film; conducting second heating processing at a second heating temperature in an oxidizing atmosphere under a second pressure in a second process chamber to selectively oxidize at least a surface of the metal film on the element isolating insulation film and form a metal oxide film; conducting third heating processing at a third heating temperature which is higher than the first heating temperature and the second heating temperature in an atmosphere in a third process chamber to increase a concentration of silicon in the silicide film; and selectively removing the metal oxide film and an unreacted part of the metal film on the element isolating insulation film, wherein in a time period between the first heating processing and the second heating processing, a pressure of an atmosphere in which the semiconductor substrate is placed is set in order to be lower than the second pressure.