| 摘要 |
PURPOSE:To improve the photoelectric conversion efficiency of a solar battery so as to reduce the cost of the battery by diffusing impurities in a semiconductor substrate after reducing the impurity concentration of the substrate by heat treatment. CONSTITUTION:The method contains a process for lowering the impurity concentration of the surface section of a semiconductor substrate containing impurities of first conductivity by heat treatment, process for forming a p-n junction by diffusing impurities of second conductivity in the surface section of the substrate, and process for forming a first electrode on the front surface of the substrate and, at the same time, a second electrode on the rear surface of the substrate. |
