Patent ID: 7498207
Filing Date: 2009-03-03
Classification: G11C,H01L

Abstract:
1. A method for manufacturing a semiconductor memory device, comprising the steps of: providing a mask having a prescribed shape at a prescribed position above a first semiconductor substrate, and oxidizing a surface of said first semiconductor substrate by using said mask, thereby forming an insulation layer in a region that is not covered by said mask; laminating a second semiconductor substrate to said first semiconductor substrate with said insulation layer interposed therebetween, thereby providing a semiconductor portion connecting said second semiconductor substrate and a semiconductor region that is a region included in said first semiconductor substrate and that is a region where said insulation layer is not formed; removing a surface of said first semiconductor substrate located opposite to that facing said second semiconductor substrate; and forming a semiconductor storage element at a surface of said first semiconductor substrate exposed as a result of removing said surface of said first semiconductor substrate, said semiconductor storage element having, under a body, said semiconductor portion connecting said second semiconductor substrate and the semiconductor region that is the region included in said first semiconductor substrate and that is the region where said insulation layer is not formed.