Patent ID: 6509254
Filing Date: 2003-01-21
Classification: H01L

Abstract:
A method of forming an electrode structure comprising the steps of:depositing a first metal film of a first metal on a silicon-containing film including silicon as a main component; depositing a second metal film of a nitride of a second metal on said first metal film; depositing a high-melting-point metal film on said second metal film, whereby obtaining an electrode structure including said silicon-containing film, said first metal film, said second metal film and said high-melting-point metal film; and conducting a heat treatment on said electrode structure at a temperature of 750Â° C. or more, wherein said first metal film has such a thickness that during said heat treatment, said first metal is nitrided to be changed into a nitride of said first metal due to a diffusion of nitrogen from said second metal film to said first metal film, said nitrogen is acquired by said first metal film, and a silicide layer of said first metal is not formed in a surface portion of said silicon-containing film.