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 70 for “"sheet resistance"”.
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Modeling 0.18[m̳u̳]m BiCMOS (S18) high sheet resistance (RPH) polysilicon resistor lifetime drift
… measuring lifetime drift in 0.18m BiCMOS high sheet resistance (RPH) polysilicon resistors. The circuit model was made using Cadence-Spectre and Verilog-A. The lifetime drift utility was written using Ocean scripting language.
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Modeling and Control of Transient Enhanced Diffusion of Boron in Silicon
… high heating rates comes at a cost of increasing sheet resistance. A model-based optimization is formulated to design the optimal annealing temperature program that gives the minimum junction depth while maintaining satisfactory sheet resistance. Comparison of different parameterizations of the …
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Semiconducting tin oxide thin films on glass
… which is also accompanied by the increase in the sheet resistance. Donors such as antimony, phosphorus and tellurium raise the infrared absorption and carrier concentration and lower the sheet resistance and extrinsic activation energy. At higher concentrations (≥ 5-10 mole%) the impurities do not …
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The current-voltage characteristics of linear chains of submicron Josephson tunnel junctions
… films have suggested an universal sheet resistance threshold of 6.4 k$\Omega$/square, below which all films become superconducting with decreasing temperature, and above which all films become insulating with decreasing temperature. At the critical sheet resistance of 6.4 …
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Fluctuating and Phase -Stiff Proximity-Induced Superconductivity in Superconductor-Semiconductor Junctions
… 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 is observed in the semiconductor at temperatures often well below the transition temperature of the …
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Iron (III) Chloride doping of large-area chemical vapor deposition graphene
… doping is an effective method of reducing the sheet resistance of graphene. This thesis aims to develop an effective method of doping large area Chemical Vapor Deposition (CVD) graphene using Iron (III) Chloride (FeCl 3). It is shown that evaporating FeCl3 can increase the carrier concentration …
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Cobalt silicide characterization
… wafer. Small feature sizes cause increased resistance, which leads to degraded device performances. Silicides can reduce sheet resistance on poly-silicon lines and shallow junctions. The mostly widely accepted silicide process, Titanium Silicide (TiSi2), was adopted because of its low …
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InP/InGaAs Heterojunction Bipolar Transistors and Field-Effect Transistors Grown by Gas -Source Molecular Beam Epitaxy
… of the junction properties and current gain-base sheet resistance ratio can be attributed to the formation of C precipitates. These findings are important for improving the reliability of C-doped InP/InGaAs HBTs. (Abstract shortened by UMI.).
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Laser processing of solution based antimony doped tin oxide thin films
… (ranging from 0.2 μm to 1.4 μm). The initial sheet resistance, optical transmission and crystal structure of the deposited films was studied. The films were subsequently post processed using three different annealing techniques: (i) Laser Processing: samples were laser processed in air to …
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Fully Solution Processed PEDOT:PSS and Silver Nanowire Semi-Transparent Electrodes for Thin Film Solar Cells
… an acid free method that results in comparable sheet resistance and transmittance of ITO electrodes. Silver nanowires fail under electrical stress due to sulfur corrosion and Joule heating (which melts and breaks apart electrical contact). A silver oxide layer coating the nanowires could hinder …
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The properties of sputtered copper oxide thin film for sensing application
… on the topography, morphology, roughness and sheet resistance at various substrate bias voltages through FE-SEM, AFM and two-point-probe analysis help confirmed the structure that were suitable for gas sensing application. Besides, the sheet resistance of the CuO thin film that were deposited …
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Co-optimizing silicon solar cell processing for efficiency and throughput
… high process throughput and steady emitter sheet resistance. Predictive simulation, electrical characterization techniques, and synchrotron-based X-ray fluorescence were combined to compare this new processing approach to standard solar cell processing. This continuously ramped temperature …
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Quantum dynamics of small Josephson junctions: an application to superconductivity in granular films
… are described which focus on the junction's DC resistance. A fully quantum mechanical Hamiltonian is employed which incorporates the dissipative effects due to the unpaired electrons by coupling to a bath of harmonic oscillators. It is shown that the model exhibits a novel zero temperature phase …
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… barriers between Cu and Si were studied using sheet resistance measurements, X-ray diffractometry (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), auger electron spectroscopy (AES) and annealing in a controlled ambient …
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Optimization of the Process for Semiconductor Device Fabrication in the MicrON 636 Whittemore Cleanroom Facility
… that accurately predicts the junction depth and sheet resistance of diffused phosphorus layers within the silicon wafer. Throughout the course of the process it is necessary to monitor the characteristics of the wafers to assure proper conditions. A semiconductor parameter analyzer has been …
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Reactive DC magnetron sputtering of ultrathin superconducting niobium nitride films
… of substrates, under various chamber conditions. Sheet resistance, thickness and superconducting critical temperature were measured for a large number of samples. Film Tc was improved by changing the way the samples were heated during the deposition, by ex situ rapid thermal processing, and in …
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Alternative transparent electrodes for organic light emitting diodes
… performance with conventional ITO films, low sheet resistance of 22.8 Ω/sq as well as a high transparency of 93.1 % (average value in the visible range). Various type of p-i-n OLEDs were employed on the structured ZnO:Al using photolithography. Green OLEDs with double emission layers have been …
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Nanocrystalline copper-tantalum composites
… analysis, x-ray diffraction, microhardness, and sheet resistance. PAPVD processing parameters varied in this study included: ion bombardment, ion to depositing atom ratio, deposition rate, and alloy composition. Thermal processing variations included: annealing at 800 C for up to 100 hours and at …
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Kinetics and mechanisms of metal silicide formation
… Si bilayers using a combination of in situ sheet resistance measurement, in situ stress measurement, x-ray diffraction, transmission electron microscopy (TEM), scanning transmission electron microscopy, and Auger electron spectroscopy (AES). Studies of the initial stage of the C49-TiSi$\sb2$ …
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Al/ti(x)w(1-X) Metal/diffusion-Barrier Systems: Interfacial Reaction Paths and Kinetics as a Function of Composition and Microstructure
… is no longer observed. Changes in Al/TiW bilayer sheet resistance $\rm R\sb{s}$ were monitored continuously as a function of time $\rm t\sb{a}$ and temperature $\rm T\sb{a}$ during UHV annealing. In addition, RBS, x-ray diffraction, transmission electron microscopy (TEM), and scanning TEM, in …
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