Patent ID: 6774016
Filing Date: 2004-08-10
Classification: H01L

Abstract:
A method for manufacturing an SOI substrate, comprising:forming a sacrificial blocking layer pattern on a silicon substrate, the sacrificial blocking layer pattern defining and covering an active region; introducing first oxygen ions at a first energy and at a first dose into the silicon substrate using the sacrificial blocking layer pattern as a mask, thereby forming a first injected region under the entire active region and forming a first portion of a second injected region adjacent to the first injected region; and introducing second oxygen ions at a second energy and a second dose into the silicon substrate above the first portion of the second injected region using the sacrificial blocking layer pattern as a mask, thereby forming a second portion of the second injected region, the second energy and the second dose each being less than the first energy and the first dose, respectively, and wherein the first and second injected regions form a field region that surrounds and isolates the active region.