Patent ID: 7655989
Filing Date: 2010-02-02
Classification: H01L

Abstract:
1. A semiconductor structure, comprising: at least one first semiconductor fin with a first top surface and a first bottom surface and comprising a semiconductor material and located directly on a planar top surface of an oxide layer that is located in a semiconductor substrate, wherein said semiconductor material of said at least one semiconductor fin contacts said planar top surface, and said first top surface is separated from said planar top surface of said oxide layer by a first height and said at least one first semiconductor fin has a first vertical dimension between said first top surface and said first bottom surface; at least one second semiconductor fin with a second top surface and a second bottom surface and comprising said semiconductor material and located on said oxide layer, wherein said second top surface is separated from said planar top surface of said oxide layer by a second height and said at least one second semiconductor fin has a second vertical dimension between said second top surface and said second bottom surface, and wherein said first height and said second height are equal and said second vertical dimension is less than said first vertical dimension; and a dielectric material portion vertically abutting a bottom surface of said at least one second semiconductor fin and said planar top surface of said oxide layer, wherein said at least one second semiconductor fin is separated from said oxide layer by said dielectric material portion.