Patent ID: 7208058
Filing Date: 2007-04-24
Classification: H01L,Y10T

Abstract:
1. A manufacturing method of a bonded substrate, comprising: gravity-dropping either one of a first wafer or a second wafer to be bonded to said first wafer onto the other one of said first and said second wafers, after said gravity-dropping, aligning respective centerlines of said two wafers to each other with a layer of air interposed between respective bonding surfaces of said two wafers, while aligning said respective orientation flats or notches of said two wafers with each other, wherein in said aligning step, said orientation flats or said notches along with said two or more cut sections for alignment of said second wafer are used as guides to move at least one of said first and said second wafer so that said centerlines of said two wafers are brought into alignment with each other, said respective portions in said cut sections for alignment located in the innermost points with respect to the center of said second wafer being brought into alignment with an outer peripheral edge of said first wafer; and after said aligning, applying a pressure to one point on each of said two wafers along a wafer thickness direction.