Patent ID: 7781313
Filing Date: 2010-08-24
Classification: H01L

Abstract:
1. A method for manufacturing a silicon wafer, comprising: holding one main surface of a thin discoid silicon wafer against a support; performing at least one of grinding and polishing on the other main surface to shape the other main surface in a concave configuration such that a thickness thereof decreases from a wafer outer periphery toward a wafer center; freeing the one main surface from the support and holding the other main surface against the support such that the thin discoid silicon wafer elastically deforms to make the one main surface generally concave with the outer periphery thereof being elevated; performing at least one of grinding and polishing on the one main surface to flatten the one main surface; and freeing the other main surface from the support, resulting in the thin discoid silicon wafer elastically deforms back to have a bowl-shaped warpage in the other main surface which has a bottom at a central part of the other main surface.