Patent ID: 6392257
Filing Date: 2002-05-21
Classification: C30B,H01L,H01S

Abstract:
A semiconductor structure, comprising:a monocrystalline silicon substrate oriented in the (100) direction; an amorphous layer overlying the monocrystalline silicon substrate; a monocrystalline layer of (100) SrTiO3 overlying the amorphous layer and rotated by 45 degrees with respect to the monocrystalline silicon substrate, and a monocrystalline layer of GaAs overlying the monocrystalline layer of SrTiO3 and rotated by 45 degrees with respect to the monocrystalline layer of SrTiO3, wherein said amorphous layer and monocrystalline layer of SrTiO3 are prepared by a process comprising exposing the monocrystalline silicon substrate to strontium, titanium and oxygen while varying the partial pressure of oxygen to both 1) epitaxially grow a 2 to 100 nm thick ordered monocrystalline layer of (100) SrTiO3 having a crystal orientation rotated by 45Â° with respect to the (100) surface of the monocrystalline silicon substrate and 2) form an amorphous silicon oxide layer overlying the silicon substrate.