Patent ID: 7427426

Claim:
A CVD method for forming a metal film on a substrate to be processed by using a metal carbonyl gas, the method comprising: a preparing step for setting an inner pressure of a vacuum chamber accommodating the substrate therein at a vacuum pressure and, heating the substrate in the vacuum chamber to a first temperature where the metal carbonyl gas is decomposed; a supplying step for supplying the metal carbonyl gas into the vacuum chamber while exhausting an inside of the vacuum chamber with a first vacuum pumping speed, in a state where the substrate is substantially heated to the first temperature; a removing step for removing, after the supplying step, a decomposed gas produced by a decomposition of the metal carbonyl gas, by stopping supplying of the metal carbonyl gas and exhausting the inside of the vacuum chamber with a second vacuum pumping speed sufficiently higher than the first vacuum pumping speed; and a repeating step for carrying out the supplying step and the removing step repeatedly.