| 摘要 |
Provided is a method for producing a solar cell that has diffusion layers of different conductivity types on the front surface and the back surface of a semiconductor substrate, wherein the method includes the following: a step for forming a diffusion protective mask containing impurities, so as to cover at least a partial region of the semiconductor substrate; and a diffusion step in which, with at least the partial portion of the semiconductor substrate being covered by the diffusion protective mask containing impurities, the diffusion step which includes thermal processing is carried out, and a first impurity diffusion layer is formed in a first region that is covered by the diffusion protective mask, and a second impurity diffusion layer having an impurity concentration or conductivity different from that of the diffusion protective mask is formed in a second region that is exposed from the diffusion protective mask. |
