Patent ID: 7259058

Claim:
A fabricating method of a semiconductor integrated circuit device having a capacitor with high-k material, comprising steps of: (a) forming a bottom electrode of said capacitor over a semiconductor substrate by a chemical vapor deposition method in a sub-atmospheric pressure using an organoruthenium compound as a precursor; (b) forming a dielectric film of said capacitor on said bottom electrode; and (c) forming a top electrode of said capacitor on said dielectric film, wherein the step (a) includes sub-steps of: (a-1) providing the semiconductor substrate in a deposition chamber; (a-2) after the step (a-1), increasing a temperature of the semiconductor substrate in the chamber up to a desired temperature without supplying any oxidation gas to the deposition chamber; (a-3) after the step (a-2), separately supplying the precursor and an oxidation gas into the deposition chamber to form a ruthenium film for the bottom electrode with a desired thickness on the heated semiconductor substrate, said oxidation gas being separately supplied to said deposition chamber by a supplying system different from a precursor supplying system and only during when the precursor being supplied; (a-4) after the step (a-3), stopping the supply of the precursor and said oxidation gas; and (a-5) after the step (a-4), decreasing the temperature of the semiconductor substrate without supplying the oxidation gas to the deposition chamber, wherein said bottom electrode essentially consists of ruthenium.