| 摘要 |
PURPOSE:To improve wafer yielding ratio from a crystal and enlarge effective dimension for photomask, by making a shape of a semiconductor wafer a square. CONSTITUTION:A wafer shape 10 is to be a square. A square-shaped wafer can be easily obtained by cutting vertically to the side of ribbon like crystal body obtained from a dendritic lifting method for instance. When the crystal is of the shape of ribbon, wafer yielding ratio can be improved and effective dimension for photomask can be enlarged. |
