Patent ID: 6211041
Filing Date: 2001-04-03
Classification: H01L,Y10S

Abstract:
A method of fabricating a silicon-on-insulator substrate, comprising the steps of:(a) forming a silicon substrate with an oxygen-containing region, wherein said oxygen-containing region contains oxygen at such a concentration that oxygen is not precipitated in said oxygen-containing region during heat treatment;(b) forming a silicon oxide film at a surface of said silicon substrate;(c) implanting hydrogen ions into said silicon substrate through said silicon oxide film;(d) overlapping said silicon substrate and a support substrate each other so that said silicon oxide film makes contact with said support substrate; and(e) applying heat treatment to the thus overlapped silicon substrate and support substrate to thereby separate said silicon substrate into two pieces at a region into which said hydrogen ions have been implanted, one of said two pieces remaining on said silicon oxide film as a silicon-on-insulator active layer,said support substrate, said silicon oxide film located on said support substrate, and said silicon-on-insulator active layer formed on said silicon oxide film defining a silicon-on-insulator structure.