Patent ID: 7402477

Claim:
A method of making a semiconductor device structure, comprising: providing a semiconductor substrate comprising: a first semiconductor layer having a first surface orientation; a first dielectric layer over the first semiconductor layer, wherein the first dielectric layer comprises a high K dielectric; a second dielectric layer over the first dielectric layer; and a second semiconductor layer over the second dielectric layer, wherein the second semiconductor layer has a second surface orientation; performing a patterned etch through the second semiconductor layer and the second dielectric layer to form an opening in the second semiconductor layer and the second dielectric layer, wherein: the patterned etch is stopped on the first dielectric layer; and the patterned etch comprises a first etch type; etching through the first dielectric layer to the first semiconductor layer using a second etch type whereby the first semiconductor layer has an exposed portion at the opening; epitaxially growing a semiconductor region of the first surface orientation from the exposed portion into the opening; forming a transistor of the first type in the semiconductor region; forming a transistor of the second type in the second semiconductor layer.