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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 94 for “"Dielectric materials"”.
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Polymer Composite Dielectric Materials For Pulse Power Applications
… fillers such as barium titanate (BT) for dielectric applications will be discussed. The strategy to overcome the poor filler-polymer interactions that form the core of issue in polymer composites is to surface-modify the filler materials. The attempt by our collaborators at Department of …
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Failure mechanisms of dielectric materials for electric motors
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Characterizing dielectric materials with a feedback-based model
… no industry standard for separating the dielectric and conductor losses that appear in PCBs. As part of the thesis work, test vehicles composed of six different dielectric materials were fabricated with different trace widths, copper foil profiles, and oxide surface treatments. A …
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Preparation of Polymer Composites As Dielectric Materials For Capacitors
<p>Polymer composites with the well-dispersed dielectric ceramic powders as fillers have exhibited enhanced dielectric properties compared to the neat polymers. Polyvinylidene fluoride (PVDF) based ferroelectric polymers are mainly used for energy storage. And CaCu3Ti4O12 (CCTO) is still a novel …
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Dielectric materials by Atomic Layer Deposition for microelectronic applications
… is an innovative technique to deposit thin film materials for several application fields. The rapid affirmation of the ALD process is related to the peculiarities of the deposition mechanism. In particular, because of the self-limiting principle and of the layer-by-layer growth mode, ALD …
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Wideband electrical characterization of multilayer low-loss dielectric materials
… work on wideband characterization of the complex dielectric constant of low-loss dielectric materials used in multilayer structures. The materials include Pyralux®, a polymer, and Green Tape™, a low-temperature co-fireable tape ceramic (LTCC). The study is composed of three main tasks. First, the …
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Dynamic tunability enhancement of reflectarray antenna using non-homogeneous dielectric materials
… based on non-homogeneous properties of substrate materials has been introduced. This research study provides a thorough investigation on the tunability performance of reflectarrays designed in X-band frequency range. The objective of this work is to demonstrate the functionality of an active …
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Physical understanding and modeling of chemical mechanical planarization in dielectric materials
… fabrication processes. This work studies CMP in dielectric materials in particular, which is widely used in device formation for isolation and in interconnect formation for dielectric planarization. The physical understanding of the process is essential for CMP tool engineers to design optimal …
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ULTRA-LOW K DIELECTRIC MATERIALS WITH HIGH BREAKDOWN STRENGTH AND EXCELLENT MECHANICAL PROPERTIES
… there is an ever-existing need to have better materials research for semiconductors. It was estimated by Gordo Moore that the number of transistors that can be fabricated on a chip would double every 18 months, and the focus of every researcher in this domain has remained to meet the projected …
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Etching kinetics and surface roughening of polysilicon and dielectric materials in inductively coupled plasma beams
… the back end, feature sidewall roughness of the dielectric materials might degrade the resolution of contacts, interfere with the deposition of conformal liner materials, and make the process integration challengeable. In an inductively coupled plasma apparatus, the etching behavior on real …
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A study of high-K dielectric materials in conjunction with a multilayer thick-film system
A new family of dielectric materials has been studied, individually as thick-film capacitors and as buried components incorporated in second-order lowpass and bandpass RC active filter circuits. The materials were electrically characterized in terms of the variation of dielectric constant and …
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Surface and interface characterisation of high-k dielectric materials on silicon and III-V semiconductor substrates
Interface formation between high-k dielectric oxide materials and semiconductor surfaces is of critical importance to the development of the next generation of high speed semiconductor devices. This thesis investigates the deposition and characterisation of a range of candidate high-k materials on …
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Study of Interactions Between Diffusion Barrier Layers and Low-k Dielectric Materials for Copper/Low-k Integration
… of diffusion barrier/adhesion promoter materials that provide excellent performance in preventing the diffusion and intermixing of Cu into the adjacent dielectrics. The integration of Cu with low-k materials may decrease RC delays in signal propagation but pose additional problems …
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A Coupled Heat Transfer and Electromagnetic Model for Simulating Microwave Heating of Thin Dielectric Materials in a Resonant Cavity
… microwave applicators for heating industrial materials with temperature-dependent properties is challenging, and trial-and-error system prototyping is an expensive and wasteful means to accomplish this goal. The purpose of this work is to combine existing heat transfer and electromagnetic …
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Impact of Chemical States on the Effective Work Function of Metal Gate and High-kappa Dielectric Materials on Novel Heterostructures
… oxidation effects of the alternate channel materials. The extracted work function of TiN with various thicknesses on HfSiO is found to be in agreement with that of TiN on a silicon substrate. X-ray and ultraviolet photoelectron spectroscopy are used to observe the interface electronic states …
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Dielectric characterization using a Wideband Dielectric Filled Cavity (WDFC)
… sample configurations used for characterizing dielectric materials over a wide band of frequencies. In the two configurations, a cylindrical cavity completely filled with a sample of the dielectric material of interest is used. The two configurations are the following: 1. The cylindrical cavity …
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Investigation Of High-k Gate Dielectrics And Metals For Mosfet Devices.
… deposition techniques have made feasible high- k dielectric materials for MOS transistors. The continued scaling of CMOS devices is pushing the Si-SiO2 to its limit to consider high-k gate dielectrics. The demand for faster, low power, smaller, less expensive devices with good functionality and …
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Flux growth, characterization, and structure-property relations for inorganic oxide crystals: Lithium triborate, potassium titanyl phosphate and lead titanate
… of three different types of inorganic nonlinear dielectric materials, namely, lithium triborate (LBO), lead titanate (PT), and potassium titanyl phosphate (KTP). The electrical and optical properties were determined and related to their structural features and crystal perfection. Manipulation of …
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Pulsed-plasma chemical vapor deposition of organosilicon thin films for dielectric applications
… is facing the increasing challenge of finding materials that can meet the stringent demands of the next generation of devices. One of the most intense, as well as diverse, fields of research has been in the area of low-k and ultralow-k dielectric materials. Dielectric materials play a key role …
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