Patent ID: 6709908
Filing Date: 2004-03-23
Classification: H01L

Abstract:
A method for making an SOI-structured semiconductor device, comprising:forming a single-crystal silicon layer on an insulating layer; forming a protective layer on the single-crystal silicon layer; oxidizing part of the single-crystal silicon layer to delimit the single-crystal layer into a plurality of delimit silicon layer segments, wherein the oxidation propagates to a position under the protective layer to form a bird's beak structure while the delimited silicon layer segments include a wedge shaped region in contact with the bird's beak structure; and implanting a dopant into the delimited silicon layer segments, the dopant having a dopant concentration distribution in the delimited silicon layer segments after implantation, wherein the implanting comprises implanting the dopant with an implantation energy so that a maximum of the dopant concentration distribution lies within the wedge-shaped region of each of the delimited silicon layer segments.