Patent ID: 7923098
Filing Date: 2011-04-12
Classification: H01L,Y10T

Abstract:
1. A low-defect-density crystalline structure, comprising: a first crystalline material; a layer of a second crystalline material epitaxially grown on the first crystalline material; and a layer of a third crystalline material epitaxially grown on the layer of the second crystalline material such that the layer of the second crystalline material is positioned between the first crystalline material and the layer of the third crystalline material; wherein the first crystalline material and the third crystalline material have a crystalline compatibility greater than a crystalline compatibility of the second crystalline material and the third crystalline material, wherein the layer of the second crystalline material has a thickness sufficient to form a desirable relationship with the third crystalline material, yet the thickness is such that the layer of the second crystalline material is strained, and wherein the layer of the third crystalline material is grown to a thickness beyond a critical thickness had the layer of the third crystalline material been grown on an unstrained layer of the second crystalline material.