Global ETD Search
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 46 for “"device geometry"”.
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Liquid Phase Epitaxial Growth and Luminescence Characteristics of Indium Gallium Phosphide Arsenide - Indium Phosphide Quantum-Well Heterostructures
Since the development of practical semiconductor devices, most work has concentrated on changing the device geometry to suit particular design constraints. However, within the last several years there has been an attempt to build an entirely new class of devices by modifying the electronic str
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Capturing spatial audio from arbitrary microphone arrays for binaural reproduction
… unwieldy to incorporate into today's consumer devices. Consumer devices, such as mobile devices, typically use cheap microphones with strict limitations on array geometry. Therefore, in order to capture spatial audio on such a device, we must be able to work with the given device geometry. To …
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Chemical vapor sensing with novel coupled-channel field-effect transistors
… characteristics of silicon semiconductor devices. This work discusses three different device geometries designed to allow organic and inorganic oxide semiconductors to influence the current in a complementary silicon semiconductor channel. The four-terminal device is a novel device …
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CARBON NANOTUBE THIN FILM AS AN ELECTRONIC MATERIAL
… candidates for next-generation nanoelectronics devices. An individual CNT possesses excellent electrical properties, but it has been extremely challenging to integrate them on a large-scale. Alternatively, CNT thin films have shown great potential as electronic materials in low cost, large area …
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Process Development for High Speed Transistor Laser Operation
… lifetime in the active region of the device to <30 ps. A fast recombination lifetime <30 ps reduces the photon-carrier resonance when modulating the device at RF frequencies. However, the transistor laser with high intrinsic optical speed is limited by more than just internal …
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Hall Effect Modeling in FEM Simulators and Comparison to Experimental Results in Silicon and Printed Sensors
… behavior under strong magnetic fields. Given a device geometry and charge carrier density and mobility, the models accurately calculated sensor resistance, Hall voltage under a normally-incident constant magnetic field, and expected offset from a population of Hall devices. The model was …
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Fluctuating and Phase -Stiff Proximity-Induced Superconductivity in Superconductor-Semiconductor Junctions
… interface. A novel 3-Terminal device geometry allows the simultaneous extraction of the specific contact conductance and the 2D sheet resistance in the semiconductor nearby the junction interface. A transition from fluctuating to phase-stiff proximity induced superconductivity …
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Aluminum/aluminum oxide structured microplasma devices: Paschen's Law and applications
Aluminum/aluminum oxide microplasma novel devices can be fabricated by sequences of inexpensive wet electrochemical processes and provide an attractive tool to study plasma physics by modifying the device geometry as desired. A wet electrochemical process, used for fabricating microscale cavities …
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Additive Manufacturing for Phase Change Thermal Energy Storage and Management
… reducing peak thermal loads. Certain electronic devices such as batteries, laser systems, or electric vehicle power electronics are highly transient and require pulse heat dissipation. Heat sinks, or thermal management devices made of a phase change material can absorb large heat spikes while …
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Inertio- and Elasto-Magnetic Fractionation of Multiple Microparticles in Newtonian and Non-Newtonian Fluid
… need for diluting sheath flows for operating devices, inability to sort multiple particles simultaneously, low purity and requirement of complicated fabrication methods. In this thesis, a hybrid scheme for sheath-less fractionation of microparticles has been devised by integrating …
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On variability and reliability of poly-Si thin-film transistors
… model that considers the effects of device geometry, substrate material, and stress conditions on NBTI is proposed. With the proposed modeling methodology, the significant impacts of device geometry, substrate, and supply voltage on NBTI in poly-Si TFTs are shown. From a circuit …
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Quantifying particle sorting in microbubble streaming flows
… mechanism, based on flow speeds and channel geometry, that reliably predicts the sorting behaviour seen in experiment. It is also shown that an asymptotic theory that incorporates the device geometry and superimposed channel flow accurately models key flow features such as peak speeds and …
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A Passive Microfluidic Device for Buffer Transfer of Cells
… in viability. In this work, a lab-on-a-chip device is proposed that uses a textit{passive microfluidic approach} to effectively transfer cells from a growth medium to a desired buffer for downstream cDEP analysis. This eliminates the need for any external fields, expensive equipment, and …
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Experiments to develop High Q and tunable superconducting coplanar resonators applicable for quantum bit technology
… coplanar resonators for quantum bit experiments. Device geometry and materials are investigated and quality factors in excess of a million have been observed. The resonant frequency as a function of temperature of a coplanar resonator is characterised in terms of the change in the number density …
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Reduced-order modeling of MEMS using modal basis functions
… the existence of system level models of MEMS devices that can capture the complex non-linear coupling between multiple physical domains, yet be sufficiently fast and compact in form to insert into a system dynamics simulator. In this thesis I explore techniques of automatically constructing …
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A thermal analysis tool for three-dimensional models of multilayer microelectronics
… behavior is examined with respect to the device geometry and external environment. The features of this tool are demonstrated on a sample multilayer package. The effects of the modeling scheme are discussed. An alternate version of the program removes a layer from the numerical model to …
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Application of microfluidic emulsion technology to biochemistry, drug delivery and Lab-on-a-Chip programmability
… polydimethylsiloxane (PDMS) microfluidic devices, pressurized immiscible fluids may be combined at a junction of two or more microchannels, combining crossflow and viscoelastic shear, to generate emulsions. Droplet sizes may be tuned from nanometers to microns in diameter, controlled by …
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Defect engineering of cuprous oxide thin-films for photovoltaic applications
… In this thesis, I utilize novel materials and device geometries to engineer defects in Cu₂O thin-films and overcome the low power-conversion-efficiency of Cu 20-based solar cells. First, nitrogen doping is proposed as an effective p-type doping method to control optical and electrical …
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Finite element model of thermoelastic damping in MEMS
… the decreased thermal conductivity in the devices with germanium causes those devices to experience thermoelastic damping of a greater magnitude than the germanium-free devices. The amount of damping exhibited is found to be well explained by existing analytical expressions for …
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Micromachining and modeling of focused field emitters for flat panel displays
… field emitters that captures all details of device geometry and produces quantitatively accurate closed-form expressions for the FN coefficients. A novel CMP-based process for making IFE-FEA is presented. We obtained devices with gate and focus apertures of 0.8 and 1.2 gm diameter, …
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