Patent ID: 7700416
Filing Date: 2010-04-20
Classification: H01L,Y10S

Abstract:
1. A method of manufacturing a semiconductor device, comprising: providing a substrate having a semiconductor surface region, wherein the substrate is a semiconductor on insulator substrate having a buried insulator layer; and forming a sacrificial stressor layer over the semiconductor surface region, the sacrificial stressor layer formed in a stressed state in comparison to the semiconductor surface region; etching trenches through the sacrificial stressor layer and through at least a portion of the semiconductor surface region and into the substrate at least to the buried insulator layer so that a patterned region of the sacrificial stressor layer induces strain in a corresponding patterned region of the semiconductor surface region to provide a strained semiconductor surface region defined laterally on at least two sides by trench walls; filling the trenches to maintain and maintaining at least a portion of the transferred stress within the strained semiconductor surface region; and removing remaining portions of the sacrificial stressor layer after the filling.