Patent ID: 7064038

Claim:
A method for fabricating a semiconductor device comprising the steps of: forming over a semiconductor substrate a first dummy electrode and a second dummy electrode, the first dummy electrode and the second dummy electrode being formed of a material-to-be-substituted which is substitutable with a material containing a metal; forming a first metal film of a first metal material on the first dummy electrode; conducting a thermal treatment at a first temperature to substitute the first dummy electrode with a first electrode of the first metal material or a compound of the first metal material; forming a second metal film of a second metal material on the second dummy electrode; and conducting a thermal treatment at a second temperature, which is lower than the first temperature and at which an interdiffusion of constituent materials between the first electrode and the second metal film does not take place, to substitute the second dummy electrode with a second electrode of the second metal material or a compound of the second metal material.