Semiconductor structure, semiconductor device, communicating device, integrated circuit, and process for fabricating the same
View Patent ↗High quality epitaxial layers of compound semiconductor materials can be grown overlying large silicon wafers by first growing an accommodating buffer layer on a silicon wafer. The accommodating buffer layer is a layer of monocrystalline oxide spaced apart from the silicon wafer by an amorphous interface layer of silicon oxide. The amorphous interface layer dissipates strain and permits the growth of a high quality monocrystalline oxide accommodating buffer layer. The accommodating buffer layer is lattice matched to both the underlying silicon wafer and the overlying monocrystalline compound semiconductor layer. Any lattice mismatch between the accommodating buffer layer and the underlying silicon substrate is taken care of by the amorphous interface layer.
1. A semiconductor structure comprising:
a monocrystalline silicon substrate;
an amorphous oxide material in contact with the monocrystalline silicon substrate;
a monocrvstalline metal oxide selected from the group consisting of alkaline earth metal titanates, alkaline earth metal zirconates, alkaline earth metal hafnates, alkaline earth metal tantalates, alkaline earth metal ruthenates, alkaline earth metal niobates, alkaline earth metal vanadates, alkaline earth metal tin-based perovskites, lanthanum aluminate, lanthanum scandium oxide, gadolinium oxide and mixtures thereof contacting the amorphous oxide material; and
a monocrystalline compound semiconductor material overlying the monocrystalline metal oxide.
2. The semiconductor structure of claim 1 wherein the monocrystalline silicon substrate is orientated in the (100) direction.
3. The semiconductor structure of claim 1 further comprising a template layer formed between the monocrystalline metal oxide and the monocrystalline compound semiconductor material.
4. The semiconductor structure of claim 1 further comprising a buffer material of monocrystalline semiconductor material formed between the monocrystalline metal oxide and the monocrystalline compound semiconductor material.
5. The semiconductor structure of claim 4 further comprising a template layer formed between the monocrystalline metal oxide and the buffer material.
6. The semiconductor structure of claim 4 wherein the buffer material is selected from the group consisting of. Germanium, a GaAs x P 1−x , superlattice where x ranges from 0 to 1, an In y Ga 1−y P superlattice where y ranges from 0to 1, and an InGaAs superlattice.
7. The semiconductor structure of claim 1 wherein the monocrystalline metal oxide comprises Sr z Ba 1−z TiO 3 wherein z ranges from 0to 1.
8. The semiconductor structure of claim 1 wherein the monocrystalline compound semiconductor material is selected from the group consisting of: III–V compounds, mixed III-V compounds, II–VI compounds, and mixed II-VI compounds.
9. The semiconductor structure of claim 1 wherein the monocrystalline compound semiconductor material is selected from the group consisting of: GaAs, AlGaAS, Inp, InGaAs, InGaP, ZnSe, AllnAs, CdS, CdHgTe, and ZnSeS.