Patent ID: 8592325
Filing Date: 2013-11-26
Classification: H01L

Abstract:
1. A method of creating insulating layers on different semiconductor materials, comprising: providing a substrate having a first semiconductor region and a second semiconductor region, wherein said first semiconductor region comprises a first semiconductor material of a first crystal orientation having a first uppermost surface, and said second region comprises said first semiconductor material having a second uppermost surface which is located adjacent to and beneath said first uppermost surface; epitaxially growing a second semiconductor material on said second uppermost surface, wherein said second semiconductor material has said first crystal orientation and a chemical composition different from said first semiconductor material; forming a trench isolation region between sidewall edges of the first semiconductor material and the second semiconductor material, said trench isolation region having a depth extending into a portion of the substrate; non-epitaxially depositing a continuous sacrificial layer of approximately constant thickness onto the first semiconductor material, the second semiconductor material and an upper surface of the trench isolation region; and converting the sacrificial layer into a layer consisting essentially of SiO