Patent ID: 8163635

Claim:
A manufacturing method of a semiconductor device comprising; preparing a semiconductor substrate which is a base substrate of the semiconductor device and which is formed with a concavity and convexity part on the surface of the semiconductor substrate; depositing on the surface of said semiconductor substrate an impurity thin film including an impurity atom which becomes a donor or an acceptor in the semiconductor substrate; performing an ion implantation from a diagonal upper direction to the impurity thin film deposited on the concavity and convexity part of said semiconductor substrate; and recoiling the impurity atom from the inside of the impurity thin film to the inside of the concavity and convexity part of said semiconductor substrate by performing said ion implantation; wherein the impurity atom in said impurity thin film is recoiled from the inside of said impurity thin film to the inside of said semiconductor substrate by a knock on effect that is caused, at a surface part of the concavity and convexity part of said semiconductor substrate, by collision of the implantation ion to the impurity atom in said impurity thin film in a direction substantially orthogonal to the surface part, wherein the impurity thin film is thickly deposited on a plane part of the surface except for the concavity and convexity part of said semiconductor substrate.