Patent ID: 7229901
Filing Date: 2007-06-12
Classification: H01L

Abstract:
1. A method of forming a strained crystalline layer on which devices may be formed comprising: (a) growing a layer of material on a side of a crystalline template layer to form a multilayer structure, the template layer supported on its other side by a sacrificial layer of a substrate having a handle layer, the grown layer and the template layer having a lattice mismatch so that the grown layer is strained as it is grown; (b) patterning and etching material adjacent to a side of the sacrificial layer to expose areas of the sacrificial layer; and (c) preferentially etching the sacrificial layer at the exposed areas of the sacrificial layer to release the multilayer structure such that the strain in the grown layer is relaxed and the crystalline template layer is strained as the grown layer relaxes.