Patent ID: 7491430

Claim:
A deposition method for forming a film on a processed substrate, where the film comprises a first thin film on the processed substrate and a second thin film on the first thin film, by supplying a first gas comprising an amide compound including a metal and a second gas reducing the first gas into a process vessel where a substrate holding table for holding the processed substrate is provided inside thereof, the deposition method comprising a first step comprising supplying the first process gas into the process vessel; a second step comprising supplying the second process gas into the process vessel and applying a first radio frequency power to a plasma-exciting part provided in the process vessel so that the second process gas is plasma excited; a third step comprising supplying the second process gas into the process vessel and applying a second radio frequency power to the plasma-exciting part provided in the process vessel so that the second process gas is plasma-excited; forming the first thin film by repeating the first step and the second step; and forming the second thin film on the first thin film by repeating the first step and the third step, wherein the second radio frequency power is lower than the first radio frequency power; and a nitrogen content of the second thin film is higher than a nitrogen content of the first thin film.