Patent ID: 6656818
Filing Date: 2003-12-02
Classification: B24B,H01L

Abstract:
A manufacturing process for a semiconductor wafer, comprising the following steps(a) surface grinding a semiconductor wafer fixed on a chuck table using a cup shaped grinding wheel, wherein the semiconductor wafer is ground toward the center thereof such that the cup shaped grinding wheel cuts into the semiconductor wafer at an outer peripheral edge thereof and moves away from the semiconductor wafer at a central portion thereof to obtain a around semiconductor wafer; (b) planarizing the around semiconductor water according to a PACE method; and (c) polishing the product of step (b) with a CMP method; wherein after the semiconductor wafer is ground toward the center thereof such that the cup shaped grinding wheel cuts into the semiconductor wafer at an outer peripheral edge thereof and moves away from the semiconductor wafer at a central portion thereof to obtain a ground semiconductor wafer, said ground semiconductor wafer has a concave ground surface before being planarized with the PACE method, said concave ground surface comprising a rise in an outer peripheral edge portion and a recess in a central portion.