Patent ID: 7879695
Filing Date: 2011-02-01
Classification: H01L

Abstract:
1. A method of manufacturing a thin silicon wafer by slicing a silicon single crystal, comprising: a thinning step of polishing a rear surface of the silicon wafer to reduce the thickness of the silicon wafer after a device structure is formed on a front surface of the silicon wafer; a mirror surface forming step of processing the rear surface of the silicon wafer into a mirror surface using a chemical mechanical polishing method; and a modifying step of dispersing abrasive grains that are harder than those used to form the mirror surface in the mirror surface forming process and forming a damaged layer, serving as a gettering sink for heavy metal, on the rear surface of the silicon wafer using the chemical mechanical polishing method, wherein the thickness of the damaged layer in a wafer depth direction is set by the chemical mechanical polishing method in the modifying step to control the gettering capability of the damaged layer.