Patent ID: 7700400

Claim:
A manufacturing method of a back-contact-type solar cell in which a linear p + -type diffusion layer and a linear n + -type diffusion layer are alternately formed on a back surface of a semiconductor substrate and positive and negative back surface electrodes are separately connected to both diffusion layers, the manufacturing method comprising: simultaneously forming the p + -type diffusion layer and the n + -type diffusion layer on the back surface of the semiconductor substrate in a state that the p + -type diffusion layer and the n + -type diffusion layer are arranged close to each other; separating the p + -type diffusion layer and the n + -type diffusion layer by removing a back surface of the semiconductor substrate on which outer end portions of the p + -type diffusion layer and the n + -type diffusion layer are brought into contact with each other, exposing a substrate portion after removal, forming a fine arrangement of the p + -type and n + -type diffusion layers and enhancing photoelectric conversion efficiency; and separately connecting positive and negative back surface electrodes to both the exposed surface of p + -type diffusion layer and exposed surface of the n + -type diffusion layer which are separated by the removing.