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 19 of 19 for “"scribing"”.
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Design and Analysis of End-Effector Systems for Scribing on Silicon
… end-effector systems used in a chemomechanical scribing process. Chemomechanical scribing is a method of patterning silicon to selectively deposit a monolayer of material on the surface of the silicon. This thesis details the development of a unique end-effector for chemomechanical scribing …
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Laser Surface Texturing, Crystallization and Scribing of Thin Films in Solar Cell Applications
… CdTe leads to substantial cost reduction. Laser scribing is a key process used to increase thin-film solar panel efficiency through the formation of serial interconnections to reduce photocurrent and resistance losses. Currently, scribing is performed using glass-side laser processes which have …
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Plonasluoksnių saulės elementų apdirbimas ultratrumpais lazerių impulsais /
… was found optimal for the CIGS solar cell scribing in terms of quality and process speed. It is very positive result for industrial applications as the cost and the system complexity are decreased. The solar cell efficiency test revealed minor degradation in photo-electrical efficiency …
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Genesis : the search for origins : the curation and contamination control of returned solar wind samples
… development of a set of protocols for the laser scribing and subdivision of the Genesis silicon collector array materials. Optimisation of the scribing speed and the positioning of the focal point of the laser were carried out. It was found that scribe width was independent of both factors. …
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Characterization, Functionalization and Applications of Alkyl Monolayers on Silicon Surfaces
… data show that alkyl monolayers prepared by scribing silicon under 1-iodoalkanes and 1-alkenes were stable over extended periods of time to air, water, a boiling acid and Al Ka X-rays. The stability is attributed to direct Si-C bonding in the monolayers. The observation that the oxygen …
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The Role of residual stresses in ceramic substrate materials for hybrid thick film applications
… of the substrate, particularly during the laser scribing phase of the finished device. Significant tensile stresses were also observed in the Silver-Palladium (Ag-Pd) metallization. TDR measurements indicated significant response variations which were attributed to these induced stresses. …
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Evaluating Differences in GPT-4 Treatment by Gender in Healthcare Applications
… settings, supporting patient messaging, medical scribing, and chatbots. While prior work has examined bias in medical LLMs, few studies focus on realistic use cases or analyze the source of the bias. To assess whether medical LLMs exhibit differential performance by gender, we audit their …
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Design of a silicon waver breaker
… the components from each other involves scribing and fracturing the silicon. This thesis presents a design for a tool to aid in controlling the fracturing process. An earlier prototype of this tool was examined and new functional requirements were described. One of the functional …
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Ultra-thin transparent electrodes for energy applications
… in thin film photovoltaic technology: laser scribing. AZO/Ag/AZO multilayers must be able to guarantee the same level of TCO reliability under laser scribing processes. In this study, we used a single nanosecond laser pulse to irradiate AZO/Ag/AZO deposited on glass.
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Development of Chemomechanical Functionalization and Nanografting on Silicon Surfaces
… becomes more favorable for longer chain species. Scribing a silicon surface in the presence of ethylene and acetylene demonstrated chemomechanical functionalization with gaseous reagents, which simplifies sample cleanup and adds a range of reagents to those possible for chemomechanical …
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A Rapid and Power-Efficient Laser-Induced Graphene Micro-Thermocycler for DNA Polymerase Chain Reaction
… integrated directly on a polymeric film by laser scribing in one step, eliminating the need for photolithography or chemical vapor deposition, and the entire device can be fabricated in under 5 minutes. This work investigates the heating performance of the LIG heater, by both Ansys Fluent …
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Synthesis Of Graphene Nanomaterials And Their Application In Electrochemical Energy Storage
… of these graphitic petals suggest a simple scribing method can be used to control both the location and formation of petals on flat Si substrates. Transitional metal oxides and conducting polymers have been coated on the graphitic petal-based electrodes by facile chemical methods for …
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Ultrafast Machining of High Temperature Superconducting Nanostructures for Novel Mesoscale Physics
… techniques, including lithography, mechanical scribing, and focussed ion beam, laser machining of YBCO has been continuously studied since 1988 due to its design flexibility and the absence of chemicals. One thing that is still not adequately understood is the nature of laser induced damage on …
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Nano Mechanical Machining Using AFM Probe
… limitations associated with the conventional AFM scribing. In this study, scratching tests are performed with a single crystal diamond AFM probe to investigate the cutting characteristics and model the ploughing cutting forces. Calibration of the probe for lateral force measurements is extended …
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Development and characterisation of macro-disc and micro-band electrodes for electrochemical sensing applications
… biosensors: Silicon microfabrication, Laser scribing, and dispense printing. The first experimental section aimed to investigate the use of a single ultramicroband electrode fabricated on silicon for mediator-free glucose monitoring in bio-fluid environments. Six ultramicroband electrodes, a …
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Low Dose Analytical Electron Microscopy of Hybrid Perovskite Photovoltaic Devices
… characterisation shows how laser pulses used in scribing the interconnection lines can decompose the perovskite layer next to those lines, and also how the decomposition is affected by the perovskite’s homogeneity. Furthermore, elemental mapping reveals diffusion of sodium from the glass …
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Examining the efficacy of joint investigative interview training through analysing the quality of interview conducted with role-play actors
… selectively as we would hope and the use of scribing as a method to record interviews is unreliable and resulted in both loss and incorrect recording of information. Further, the field interviews conducted with children in Scotland are of a low standard (6% open prompts), therefore, practical …
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Development of meso-scale flexible cutting tool for micro-groove cutting in steel
… etc. Processes such as micro-endmilling, laser scribing, μ-EDM, micro-fly cutting, AFM microscribing, photolithography, etc. have shown capability in producing micro-scale grooves in a range of materials. However, they were found to have limitations in producing grooves in hard materials that …
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Development of new synthesis processes and deposition of Perovskites for use in photovoltaic applications in coupling with monocrystalline silicon substrates [Sviluppo di nuovi processi di sintesi e deposizione di perovskiti per l'uso in applicazioni fotovoltaiche in accoppiamento con substrati di silicio monocristallino]
Le perovskiti si sono affermate come uno dei materiali più promettenti per le tecnologie fotovoltaiche di nuova generazione, grazie alle loro elevate efficienze di conversione, ai bassi costi di produzione e alle proprietà modulabili. Tra queste, le perovskiti alogenate completamente inorganiche …