Patent ID: 7615391

Claim:
A method of fabricating a solar cell having a plurality of grooves nearly-parallel to each other on at least one main surface of a semiconductor substrate, comprising: rotating a plurality of groove-carving blades that are disposed parallel to each other, while keeping edge portions of the groove-carving blades projected equally by a predetermined height over a flat substrate feeding surface of a working table, carving the plurality of grooves having a predetermined depth on the at least one main surface of the semiconductor substrate while keeping a surface opposite the at least one main surface in close contact with the substrate feeding surface so as to be parallel to the substrate feeding surface, and moving the substrate in a direction along the substrate feeding surface relative to the plurality of groove-carving blades such that the direction is normal to a thickness-wise direction of the groove-carving blades, wherein the substrate is configured to have a thickness decreasing from a first side of the at least one main surface to a second side opposed to the first side, and the first side and the second side of the at least one main surface are the sides that are substantially normal to the moving direction.