Patent ID: 7531395
Filing Date: 2009-05-12
Classification: H01L

Abstract:
1. A method of forming a layer comprising epitaxial silicon, comprising: etching an opening into a silicate glass-comprising material received over a monocrystalline material, the etching being to the monocrystalline material effective to expose the monocrystalline material at a base of the opening; epitaxially growing a silicon-comprising layer within the opening from the monocrystalline material exposed at the base of the opening; etching the silicate glass-comprising material from the substrate effective to leave a free-standing projection of the epitaxially grown silicon-comprising layer projecting from the monocrystalline material which was at the base of the opening; and prior to the growing, lining the opening with a material other than silicate glass such that the epitaxially grown silicon-comprising layer does not contact the silicate glass-comprising material within the opening during the growing, the lining comprising forming insulative material atop the silicate glass-comprising material and within the opening to less than completely fill the opening, the insulative material being formed to a greater thickness atop the silicate glass-comprising material than over sidewalls of the opening and than over the base of the opening, the insulative material being different in composition from that of the silicate glass-comprising material.