Patent ID: 6259137
Filing Date: 2001-07-10
Classification: H01L

Abstract:
A silicon-on-insulator material comprising a semiconductor substrate having a continuous buried oxide region formed therein, wherein said continuous buried oxide region has a variable, but controllable, continuous thickness of from about 800 to about 2000 .ANG. and said material has an etch pit density of less than 1.times.10.sup.5 cm.sup.-2, a top or bottom Si/buried oxide roughness of less than 200 .ANG., HF-defect density of less than 5 .ANG. cm.sup.-2, and a surface roughness of less than 5 .ANG. root mean square which is obtained by:(a) creating a stable buried damage region in said semiconductor substrate;(b) forming an amorphous layer adjacent to said stable buried damaged region; and(c) oxidizing the structure produced by step (b) under conditions effective to diffuse oxygen into said semiconductor substrate causing formation of said continuous buried oxide region.