Patent ID: 7709361

Claim:
A method for manufacturing a semiconductor device, comprising: forming an impurity diffusion layer in a surface of a semiconductor substrate, wherein forming the impurity diffusion layer comprises irradiating material including M 1 x M 2 y (y/x≦1.2, where x is a ratio of M 1 , y is a ratio of M 2 , M 1 is a material which serves as an acceptor or a donor in the semiconductor device, M 2 is a material which does not serve as a donor or an acceptor in the semiconductor device (except semiconductor of the semiconductor substrate)) onto the semiconductor substrate; and heating the semiconductor substrate by light, wherein the irradiating the material including M 1 x M 2 y onto the semiconductor substrate comprises selectively irradiating the material including the M 1 x M 2 y onto a predetermined area of the semiconductor substrate via a stencil mask or an opening of a shutter disposed above the semiconductor substrate.