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. One way to achieve the formation of a compliant substrate includes 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 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. A device structure for interacting with optical storage media is formed overlying the monocrystalline substrate. Portions or an entirety of the device structure can also overly the accomodating buffer layer, or the monocrystalline material layer.
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. One way to achieve the formation of a compliant substrate includes 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 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. A device structure for interacting with magnetic storage media is formed overlying the monocrystalline substrate. Portions or an entirety of the device structure can also overly the accomodating buffer layer, or the monocrystalline material layer.
Abstract:
An apparatus for generating an oscillating reference signal at a reference frequency includes: (a) a light conveying element having a first end and a second end; the light conveying element conveying substantially all light received or reflected at one end to the other end; the light conveying element having a light transmission path intermediate the first end and the second end; the transmission path being related to the reference frequency; (b) a light transmitting element oriented to introduce light into the light conveying element at one end of the light conveying element; and (c) a light receiving element oriented to receive the transmitted light at one end of the light conveying element. The light conveying element, the light transmitting element and the light receiving element are implemented in a monolithic structure arranged on a single substrate.