Patent ID: 7144779

Claim:
A method of forming epitaxial silicon-comprising material, comprising: providing a substrate comprising monocrystalline material, a first portion of the monocrystalline material being upwardly exposed while a second portion of the monocrystalline material is upwardly masked; epitaxially growing a first silicon-comprising layer from the upwardly exposed monocrystalline material of the first portion and not from the monocrystalline material of the upwardly masked second portion; after growing the first silicon-comprising layer, upwardly unmasking the second portion of the monocrystalline material to expose a horizontal surface of monocrystalline material of the second portion; after the upwardly unmasking, epitaxially growing a second silicon-comprising layer from the first silicon-comprising layer and upwardly from the unmasked monocrystalline material of the second portion; and incorporating the first and second silicon comprising layers into a component of a vertically oriented field effect transistor.