Structure and method for fabricating semiconductor structures and devices utilizing photonic crystals
First Claim
1. A semiconductor structure comprising:
- a monocrystalline silicon substrate;
an amorphous oxide material overlying the monocrystalline silicon substrate;
a monocrystalline perovskite oxide material overlying the amorphous oxide material;
a monocrystalline optical isolation layer overlying the monocrystalline perovskite oxide material;
at least one photonic crystal formed on the monocrystalline optical isolation layer; and
at least one control structure formed at least in part in the monocrystalline silicon substrate and coupled to the at least one photonic crystal structure.
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Accused Products
Abstract
High quality epitaxial layers of monocrystalline materials can be grown overlying monocrystalline substrates such as large silicon wafers by forming a compliant substrate for growing the monocrystalline layers. An accommodating buffer layer comprises a layer of monocrystalline oxide spaced apart from a 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 material layer. Any lattice mismatch between the accommodating buffer layer and the underlying silicon substrate is taken care of by the amorphous interface layer. In addition, formation of a compliant substrate may include utilizing surfactant enhanced epitaxy, epitaxial growth of single crystal silicon onto single crystal oxide, and epitaxial growth of Zintl phase materials. Photonic crystal structures may be integrally provided with such semiconductor structures, which semiconductor structures may also include optically active devices and control circuitry.
37 Citations
30 Claims
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1. A semiconductor structure comprising:
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a monocrystalline silicon substrate;
an amorphous oxide material overlying the monocrystalline silicon substrate;
a monocrystalline perovskite oxide material overlying the amorphous oxide material;
a monocrystalline optical isolation layer overlying the monocrystalline perovskite oxide material;
at least one photonic crystal formed on the monocrystalline optical isolation layer; and
at least one control structure formed at least in part in the monocrystalline silicon substrate and coupled to the at least one photonic crystal structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30)
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15. A process for fabricating a semiconductor structure comprising:
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providing a monocrystalline silicon substrate;
depositing a monocrystalline perovskite oxide film overlying the monocrystalline silicon substrate, the film having a thickness less than a thickness of the material that would result in strain-induced defects;
forming an amorphous oxide interface layer containing at least silicon and oxygen at an interface between the monocrystalline perovskite oxide film and the monocrystalline silicon substrate;
epitaxially forming a monocrystalline optical isolation layer overlying the monocrystalline perovskite oxide film;
forming at least one control structure at least in part in the monocrystalline silicon substrate; and
forming at least one photonic crystal structure on the monocrystalline optical isolation layer and coupled to the at least one control structure.
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27. A semiconductor structure comprising:
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a monocrystalline silicon substrate;
an amorphous oxide material overlying the monocrystalline silicon substrate;
a monocrystalline perovskite oxide material overlying the amorphous oxide material;
a monocrystalline optical isolation layer overlying the monocrystalline perovskite oxide material;
a photonic crystal structure formed on the monocrystalline optical isolation layer; and
a control structure formed at least in part in the monocrystalline silicon substrate and coupled to the photonic crystal structure.
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Specification