Patent ID: 6486037
Filing Date: 2002-11-26
Classification: H01L

Abstract:
A method of fabricating a defect induced buried oxide region having a controllable thickness and a fixed charge, said method comprising:(a) implanting oxygen ions into a surface of a semiconductor substrate at a base ion dose of about 5Ã—1016 cmâˆ’2 or above so as to form a stable buried damaged region in said semiconductor substrate; (b) implanting second ions into said surface of said semiconductor substrate at a second ion dose of about 1Ã—1015 cmâˆ’2 or above so as to form an amorphous layer adjacent to said stable buried damaged region, wherein said second ions comprise at least one dissimilar ion than said oxygen ions employed in step (a); and (c) oxidizing the implanted structure produced by step (b) so as to form a buried oxide region within said substrate.