Patent ID: 8404571

Claim:
A film deposition method of depositing a thin film on one main surface of a substrate, comprising the steps of: preparing the substrate; curving said substrate relative to a direction along said one main surface; and after curving said substrate, depositing the thin film on said one main surface of said substrate with said substrate curved, wherein in said step of curving said substrate, said substrate is curved by independently controlling heating temperatures of a first heating member disposed to face said one main surface of said substrate and a second heating member disposed to face the other main surface of said substrate opposite to said one main surface, wherein said substrate is curved relative to the direction along said one main surface in accordance with a first lattice constant as a lattice constant of a material that will constitute said thin film to be deposited and a second lattice constant as a lattice constant of a material constituting said one main surface of said substrate on which said thin film is to be deposited, and wherein when said first lattice constant is larger than said second lattice constant, said substrate is curved in a direction projecting toward said one main surface with respect to a shape before execution of the step of curving said substrate, and when said first lattice constant is smaller than said second lattice constant, said substrate is curved in a direction recessed toward said one main surface with respect to the shape before execution of the step of curving said substrate.