Patent ID: 9059245
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A method of forming a semiconductor-on-insulator substrate comprising: providing a semiconductor substrate; implanting oxygen ions into a semiconductor material portion of the semiconductor substrate, wherein said implanting oxygen ions is performed at a substrate temperature of greater than 600° C. utilizing an ion implant energy of less than 40 keV to form an implanted region containing oxygen ions within said semiconductor material portion of said semiconductor substrate; and annealing said semiconductor substrate including said implanted region in an atmosphere containing oxygen and at a temperature of less than 1250° C. to convert said implanted region into a buried oxide layer having a thickness of less than 300 Å located between a top semiconductor layer and a bottom semiconductor layer, wherein during said annealing a surface oxide layer forms across an entire length of said semiconductor substrate.