Patent ID: 8062970

Claim:
A production method for a semiconductor device provided with a conductive film with predetermined film thickness on a sidewall of a concave portion formed in an insulating film, comprising: a step of forming a concave portion in the insulating film formed on the semiconductor substrate; and a step of forming a conductive film with a film thickness calculated based upon a film thickness of a conductive film to be formed in the concave portion, a depth of the concave portion, and a projected area on the sidewall of said concave portion when viewing the concave portion from the upper surface, to be formed over the upper surface of the insulating film where the concave portion is formed, using a sputtering method where substrate RF power is applied, wherein a film thickness of the conductive film to be formed at a bottom surface of the concave portion is thinner than that of the conductive film to be formed over the upper surface of the insulating film where the concave portion is formed.