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 123 for “"Silicon wafers"”.
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Fracture Resistance of Coated Polycrystalline Silicon Wafers
… functional units in the solar energy devices are silicon wafers in both single- and poly-crystalline forms. Their inherent defects and brittleness, however, impair their performance and reliability and can lead to premature fracture. This becomes important in applications in which silicon-based …
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Designing a mechanism to cleave silicon wafers
… designed and manufactured to precisely cleave silicon wafers. Two vacuum chucks were designed to support a 150 mm diameter silicon wafer and cleave it by providing a pure moment at a pre-etched v-notch while a vacuum was created on either side of the cut. The design of the vacuum chucks would …
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Emissivity of patterned silicon wafers in rapid thermal processing
The influence of patterns on emissivity in silicon wafers in rapid thermal processing systems has been investigated. In this study, two experiments with layered and patterned silicon wafers were conducted. The main difference in the experiments is the way in which the temperature was controlled. …
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Geometry control of recrystallized silicon wafers for solar applications
The cost of manufacturing crystalline silicon wafers for use in solar cells can be reduced by eliminating the waste streams caused by sawing ingots into individual wafers. Professor Emanuel Sachs has developed a new method of manufacturing silicon wafers that consists of first, rapidly creating a …
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Advanced Characterization of Defects in Silicon Wafers and Solar Cells
… the recombination properties of bulk defects in silicon wafers is essential for further improvement of performance and stability of silicon solar cells. This thesis focuses on the characterization of the electrical properties of bulk defects in silicon. Injection dependent lifetime spectroscopy, …
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Characterization of residual stresses in birefringent materials applied to multicrystalline silicon wafers
… materials. Single and multicrystalline silicon was chosen as the model material. Silicon is an interesting and important material in its own right, and the use of photoelasticity to determine stresses at linear and planar defects can have important consequences in the electrical …
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Temperature-dependent yield properties of passivated aluminum thin films on silicon wafers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Methods of improving the surface flatness of thin glass sheets and silicon wafers
The manufacturing of high quality sheet glass has allowed for many technologies to advance to astonishing frontiers. With dimensions reaching ~ 3 x 3 m², sheet glass is pushing the envelope for producing massive size flat panel displays that can be hung on walls like paintings. Many other …
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Sacrificial high-temperature phosphorus diffusion gettering for lifetime improvement of multicrystalline silicon wafers
… lifetime-limiting impurities in crystalline silicon solar cells. In as-grown material, iron is present in precipitates and in point defects. To achieve conversion efficiencies in excess of 20%, bulk minority-carrier lifetimes in excess of 300 Rs (p-type) are required [1]. For cost-effective …
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Electroless Silver Deposition on (100) and (111) Silicon Wafers, Fabrication of Nanowires and Nanopillars by Assisted Etching
Le nanoscienze e i nanomateriali promettono particolari ed entusiasmanti applicazioni, grazie alla scoperta delle loro proprietà chimico fisiche sensibili alla loro dimensione. La realizzazione di nanostrutture di silicio, la crescita di nanowires in particolare, è di rilevante importanza nel …
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Decoupling bulk- and surface-limited lifetimes in thin kerfless silicon wafers using spectrally resolved transient absorption pump-probe spectroscopy and computer simulations
… objectives to further decrease the cost of silicon (Si) PV and enable manufacturing of crystalline silicon is to improve the quality of thin, kerfless Si wafers to monocrystalline equivalent. To aid wafer manufacturers to develop high-quality thin Si wafer substrates, performance-limiting …
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Ultrathin silicon wafer bonding physics and applications
Ultrathin silicon wafer bonding is an emerging process that simplifies device fabrication, reduces manufacturing costs, increases yield, and allows the realization of novel devices. Ultrathin silicon wafers are between 3 and 200 microns thick with all the same properties of the thicker silicon …
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Applications of Spectrally-Resolved Photoluminescence in Silicon Photovoltaics
… emitted from different structures in crystalline silicon wafers and solar cells. Based on the knowledge accumulated, it also establishes a variety of applications of photoluminescence spectroscopy in silicon photovoltaics. The thesis may be divided into 3 main categories: band-to-band luminescence …
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Applications of Spectrally-Resolved Photoluminescence in Silicon Photovoltaics
… emitted from different structures in crystalline silicon wafers and solar cells. Based on the knowledge accumulated, it also establishes a variety of applications of photoluminescence spectroscopy in silicon photovoltaics. The thesis may be divided into 3 main categories: band-to-band luminescence …
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Koh etching of silicon
… a series of comparative etching experiments on silicon wafers have been carried out using potassium hydroxide (KOH) for different experimental etching conditions for concentration, temperature and time on (100) orientation p-type silicon wafers. Besides the basic etching conditions, the position …
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Nondestructive photoelastic characterization of monocrystalline silicon photovoltaic wafers
Silicon wafers produced for the photovoltaic industry are becoming thinner. This renders the wafers more susceptible to bow under thermal residual and wafer handling stresses. Furthermore, a saw damage layer exists on the top and bottom surface of each wafer as a result of slicing the silicon ingot …
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ADVANCED MATERIALS DEVELOPMENT AND MANUFACTURING - DEVELOPMENT OF THERMALLY STABLE THIN FILMS WITH HIGH STRESS TUNABILITY
… in higher compressive wafer bow of Production Silicon Wafers which is undesirable in manufacturing process flow due to downstream process and/or yield downside. With increasing vertical scaling up of 3D NAND cells as part of NAND development strategy/roadmap, wafer bow management is becoming …
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Anisotropic etching for silicon micromachining
Silicon micromachining is the collective name for several processes by which three dimensional structures may be constructed from or on silicon wafers. One of these processes is anisotropic etching, which utilizes etchants such as KOH and ethylene diamine pyrocatechol (EDP) to fabricate structures …
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The design, fabrication, and implications of a solvothermal vapor annealing chamber
… the self-assembly of block copolymers (BCPs) on silicon wafers which are then used to generate nanoscale patterns through the use of additive lithography. The chamber aids in the low-waste production of research and development silicon wafers possessing unparalleled surface resolution and feature …
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Development of a melting and directional solidification process for improving the grain structure and electronic properties of a silicon wafer
… that produces high quality, inexpensive kerfless silicon wafers for photovoltaic cells is highly desirable. The process herein described was developed to melt and directionally solidify fine-grained silicon wafers at accelerated feed rates for improved electronic properties. The proposed process …
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