Patent ID: 7981807
Filing Date: 2011-07-19
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: providing a semiconductor wafer comprising a first semiconductor element and a second semiconductor element that are formed on an insulation film formed on a first surface of the semiconductor wafer; forming a first wiring for the first semiconductor element on the insulation film and a second wiring for the second semiconductor element on the insulation film so that the first and second wirings are disposed adjacent a border between the first and second semiconductor elements; bonding a supporting substrate with an adhesive to the first surface so that the first and second wirings are covered with the supporting substrate; back-grinding a second surface of the semiconductor wafer, the second surface being opposite to the first surface; reducing a roughness of the back-ground second surface by etching the back-ground second surface; etching selectively the semiconductor wafer to form a groove in the semiconductor wafer at the border; wet etching the second surface after forming the groove so as to round a corner of the groove; and forming an insulation film on the etched and back-ground second surface.