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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 131 for “"silicon substrate"”.
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Colloidal quantum dot based light emitting devices on silicon substrate
Light sources based on silicon have been the subject of interest for many years. Silicon would not only provide high volume manufacturing for commercialization but also allow complementary metal oxide semiconductor (CMOS) compatibility enabling integration of light sources within CMOS circuitry. …
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A high aspect-ratio silicon substrate-via technology and applications
Substrate vias are widely used in GaAs microwave and millimeter-wave ICs to provide low impedance ground connections. As silicon RFICs strive for high-frequency operation, it becomes increasingly important to reduce all extrinsic parasitics. Of particular concern is the MOSFET source or BJT emitter …
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Design of III-V Multijunction Solar Cells on Silicon Substrate
… III-V solar cells are grown on Ge or GaAs substrates, which are not only smaller in diameter, but are also more expensive than Si substrate. Direct integration of high efficiency III-V solar cells on larger diameter, cheaper and readily available Si substrate is highly desirable for …
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Orientation Controllable Epitaxial Vapor-Liquid-Solid Semiconductor Nanowire Synthesis on Silicon Substrate
… for the future electronic devices. Germanium and silicon nanowires, in particular, are compatible with the current silicon-based technology via direct assembly. However, one of the main challenges for the successful nanowire application in large-scale is the lack of the method for obtaining …
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Modeling and control of a silicon substrate heater for carbon nanotube growth experiments
… working on carbon nanotube growth experiments on silicon substrates and in microfabricated silicon devices, to try to produce improved bulk nanotube growth. For this thesis, a heating control system was designed and implemented for eventual use in CNT growth experiments. The computer program that …
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Studies of Field -Induced Stress on Ultrathin Layers of Silicon Dioxide on a Silicon Substrate
… here the results of an STM study of ultrathin silicon dioxide layers on a silicon substrate. We have found that under certain conditions, structures subjected to field-induced stress with the STM exhibit changes in their conductivity which we believe are evident in the images as the voltage of …
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Studies of Field-Induced Stress on Ultrathin Layers of Silicon Dioxide on a Silicon Substrate
… here the results of an STM study of ultrathin silicon dioxide layers on a silicon substrate. We have found that under certain conditions, structures subjected to field-induced stress with the STM exhibit changes in their conductivity which we believe are evident in the images as the voltage of …
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CREATING TEST MECHANISMS FOR SILICON SUBSTRATE BASED (SSB) DEVICES FOR USE IN FAR-IR TO MILLIMETER ASTROPHYSICAL SPECTROSCOPY
… of how to design a tip-tilt mechanism for a silicon based FPI. By rotating the FPI at variable, measurable angles in either direction relative to the incoming beam with one degree rotation increments, while it is cooled in a cryostat, we can measure the spectral profile of the FPI. This …
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Molecular Dynamics Studies of Thin-Film Evaporation: The Effect of Graphene-Coated Silicon on Water Evaporation Behavior
… transfer in thin-film evaporation of water on a silicon substrate, and equilibrium molecular dynamics simulations are used to study the surface wettability by measuring contact angle. The surface wettability is changed by coating a layer of graphene on the silicon substrate. The observed …
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Ion Implantation Synthesis of Silicon Carbide
Silicon wafers with 200A of carbon deposited on the surface were implanted with 50 keV N⁺ ions at a dose of 1x10¹⁶ ions/cm² at room temperature. The implanted samples were cut to several pieces and annealed in vacuum (at a pressure of 5x10⁻⁸ torr) at temperatures of 800°C and 900°C, and inert gas …
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Controlling CoSi2 formation temperature by reactive deposition
… under ultra high vacuum conditions onto a heated silicon substrate, the reaction between the cobalt and the silicon starts immediately and cobalt silicides are formed directly - a technique referred to as reactive deposition. This procedure was used to grow silicide films over a variety of …
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III-V compound semiconductor selective area epitaxy on silicon substrates
… of III-V compound semiconductor materials and silicon is a way to solve the silicon feature size limit and power consumption problems given the high electron mobility that the III-V semiconductors have. Higher electron transport properties than silicon enable the electronic devices made of …
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Synthesis and analysis of carbon nanowalls and their raman spectroscopy
… Chemical Vapor Deposition (RF-PECVD) on various substrates. Hydrogen was used as an active gas for the growth where as Ethanol bubbled with Argon was used as carbon source for formation of Carbon Nanowalls (CNW). The growth was then confinned by Raman Spectroscopy and Scanning Electron Microscope …
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Chemical vapor sensing with novel coupled-channel field-effect transistors
… Coupling disordered semiconductors with silicon channels can produce the detection range of organic and inorganic oxide semiconductors combined with the stability of electrical characteristics of silicon semiconductor devices. This work discusses three different device geometries designed …
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Study of nuclear transmutation using cyclotron for post-CMOS activation of Beta emitters
… radioisotope. A microfabricated p-n diode on a silicon substrate coated with specific radioisotope precursors is used as the test basis of study. These results show promise for a broad impact in mass production of post-CMOS devices compatible with a simple radioisotope loading process on fully …
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Fresnel phase plates as reconfigurable microfluidic lenses
… a Fresnel pattern which was transferred to a silicon substrate via photolithography. A layer of PDMS was spin-coated on the substrate and cured to produce the lens. This lens was attached to a PDMS control layer which enabled specific regions of the lens to addressed, via the application of …
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An in Situ Study of the Stresses in Silicide Thin Films
… introduced to determine the film stress of metal silicon interfaced materials in-situ. This technique requires the use of a spatially wide yet highly collimated white beam of synchrotron radiation, and a properly chosen filter. The technique is properly termed Absorption Edge Contour (AEC) …
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Nanostructured diamond-like carbon by dual pulsed laser ablation-pulsed gas feeding
… in a methane atmosphere on corning glass and silicon substrate. The structures of Diamond-like carbon film such the surface morphology and the composition has been studied by the scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The structural properties of DLC …
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Sol-gel synthesis of one-dimensional photonic bandgap structures
… optical thickness layers of the two films on a silicon substrate for a total of six layer pairs. This device exhibited an omnidirectional photonic bandgap of 450 nm in TE-polarization and 110 nm in TM-polarization. A microcavity, or narrowband filter, was fabricated with a TiO2 Fabry-Perot …
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A Microfabricated Bioimpedance Sensor with Enhanced Sensitivity for Early Breast Cancer Detection
… sensor with flat gold microelectrodes on a silicon substrate was designed and fabricated. Suberoylanilide hydroxamic acid (SAHA), an FDA-approved anti-cancer agent was used to improve the sensitivity of the bioimpedance sensor towards cancer cells by selectively modifying their …
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