Patent ID: 6673646
Filing Date: 2004-01-06
Classification: C30B,H01L

Abstract:
A process for fabricating a semiconductor device structure comprising:providing a monocrystalline semiconductor substrate; epitaxially growing a monocrystalline oxide layer overlying the substrate, the oxide layer having a predetermined thickness and comprising a material selected from the group consisting of lanthanum aluminate, alkaline earth metal titanates, alkaline earth metal zirconates, alkaline earth metal hafnates, alkaline earth metal tantalates, alkaline earth metal ruthenates, and alkaline earth metal niobates; growing an amorphous layer underlying the monocrystalline oxide layer by increasing the partial pressure of oxygen during the step of epitaxially growing a monocrystalline oxide layer to a partial pressure greater than that needed to grow the monocrystalline oxide layer; photolithographically patterning and etching the monocrystalline oxide layer to form a plurality of oxide mesas; and epitaxially growing a monocrystalline semiconductor layer overlying each of the oxide mesas.