| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the manufacturing method of a solar battery cell which removes heavy metal impurities generated in the manufacturing processes of the solar battery cell without increasing the manufacturing cost of the solar battery cell and can prevent a reduction in the lifetime of a silicon wafer. SOLUTION: The manufacturing method of a solar battery cell conducts at least a P-N junction forming process and an electrode forming process on a silicon wafer formed by slicing a silicon single crystal to manufacture the solar battery cell. A work strain 1a on the side of the surface of the sliced silicon wafer 2 is removed. After at least a P-N junction forming treatment is performed on the side of the surface of the wafer 2, a work strain 1b on the side of the rear of the wafer 2 is removed. A silicon single crystal which is formed by a CZ method and contains Ga as a dopant is desirably used as the silicon single crystal, and the removal of the work strain on the side of the surface is performed by a spin etching.</p> |
