Patent ID: 7482209
Filing Date: 2009-01-27
Classification: H01L

Abstract:
1. A method for fabricating a hybrid orientation substrate comprising: forming a surface semiconductor layer over a base semiconductor substrate to leave exposed a portion of the base semiconductor substrate, wherein a buried dielectric layer is interposed between the surface semiconductor layer and the base semiconductor substrate; epitaxially horizontally growing the surface semiconductor layer to form a horizontally augmented surface semiconductor layer and epitaxially vertically growing the base semiconductor substrate to form an epitaxial surface semiconductor layer absent a spacer formed adjoining a sidewall of the surface semiconductor layer, the horizontally augmented surface semiconductor layer and the epitaxial surface semiconductor layer contacting at an interface not perpendicular to the base semiconductor substrate; implanting a dielectric forming ion through the horizontally augmented surface semiconductor layer and the epitaxial surface semiconductor layer to form a buried dielectric layer separating both the horizontally augmented surface semiconductor layer and the epitaxial surface semiconductor layer from the base semiconductor substrate; planarizing the horizontally augmented surface semiconductor layer and the epitaxial surface semiconductor layer to coplanarity; forming a first transistor having a first polarity within the horizontally augmented surface semiconductor layer and forming a second transistor having a second polarity different than the first polarity within the epitaxial surface semiconductor layer, wherein the first polarity is an n polarity and the horizontally augmented surface semiconductor layer has a (100) crystallographic orientation and the second polarity is a p polarity and the epitaxial surface semiconductor layer has a (110) crystallographic orientation.