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Dissertations / Theses on the topic 'Plasma Electronics'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Roth, Weston Charles 1970. "Electrical characterization and plasma impedance measurements of a RF plasma etch system." Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/291351.

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A modified Tegal MCR-1 plasma etch system has been electrically characterized, and the plasma impedance has been measured at 13.56MHz. Important aspects of radio-frequency (RF) impedance measurements are addressed as they pertain to the measurement of the plasma impedance. These include: transmission line effects, magnitude and phase errors of the measurement probes, and the intrinsic impedance of the empty plasma chamber. Plasma harmonics are discussed, and a technique for measuring the plasma impedance at harmonic frequencies is presented. Transients in the plasma impedance are observed duri

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2

Hansson, Björn. "Laser-Plasma Sources for Extreme-Ultraviolet Lithography." Doctoral thesis, KTH, Physics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3677.

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<p>This thesis describes the development and characterizationof a liquidxenon- jet laser-plasma source forextreme-ultraviolet (EUV) radiation. It is shown how thissource may be suitable for production-scale EUV lithography(EUVL).</p><p>EUVL is one of the main candidates to succeeddeep-ultraviolet (DUV) lithography for large-scalemanufacturing of integrated circuits (IC). However, a majorobstacle towards the realization of EUVL is the currentunavailability of a source meeting the tough requirements onespecially power and cleanliness for operation in an EUVLstepper. The liquid-xenon-jet laser-pl

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3

Marrett, Sean 1960. "A high-order finite element method for Tokamak plasma equilibria /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56809.

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A numerical method for the solution of the axisymmetric, free-boundary, Tokamak equilibrium problem is described. The method uses high-order polynomials defined over a mesh of triangular finite elements to solve the magnetohydrodynamic equilibrium (Grad-Shafranov) equation. Arbitrary coil and plasma current configurations can be specified. The formulation incorporates a nonlinear procedure for computing the coil currents required to place the plasma in a desired position. The solution to the nonlinear Grad-Shafranov equation is computed using a modified Newton's method. The inner-most system o

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4

DeLoach, Charles Alan 1960. "Analysis of plasma etch defects utilizing a comb test structure." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278211.

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Three metal compositions are patterned via plasma etching into comb structures. The comb structures have pitches of 4 μm, 5 μm, 7 μm and 12 μm, with a line width of 2 μm, on a field oxide of 8,000 Angstroms thickness, using <111> p-type substrates. These comb test structures have been used to determine the number of bridges, and thus the yield, of the metal compositions: pure aluminum, silicon(2%)-aluminum, and copper(0.5%)-silicon(2%)-aluminum. Bridge failures are photographed and classified according to the source of the defect. The defects due to plasma particles are used to determine a yie

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5

Zaarouri, Kamel. "Closed-loop control of plasma osmolality in patients with central diabetes insipidus." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:8881/R/?func=dbin-jump-full&object_id=92300.

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6

Poolcharuansin, Phitsanu. "The development of electrical plasma diagnostics for HiPIMS discharges." Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/7495/.

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High power impulse magnetron sputtering (HiPIMS) is a plasma-based thin film deposition technique in which extremely high power pulses are applied to a conventional magnetron sputtering source. As a result, the plasma density in HiPIMS discharges is considerably increased up to 1E19 per cubic metre, about three orders of magnitude higher than that in conventional direct current magnetron sputtering (DCMS) discharges. Hence the vapour of the sputtered species becomes highly ionised, leading to remarkable improvement in the microstructure and the properties of depositing films. To better control

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7

Julander, Anneli. "Exposure to brominated flame retardants in electronics recycling : air and human plasma levels /." Örebro : Örebro universitetsbibliotek, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-91.

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8

Kong, Yung 1967. "Particle contamination in sulfur-hexafluoride/argon plasma etching process." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277919.

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Process generated particle contamination on unpatterned silicon wafers etched in an SF6/argon plasma using a Tegal MCR-1 etcher in the plasma triode-1 mode was characterized using response surface methodology. Particle deposition was observed to be a predictable function of plasma parameter space, which can be determined by relatively few statistically designed experiments. A model of particle deposition as a function of 13.56 MHz chamber electrode rf power, chamber pressure, gas flow rate, etch time and 100 kHz wafer electrode power was constructed. It is found that particle deposition depend

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9

Bowes, Michael. "Plasma diagnosis of reactive high power impulse magnetron sputtering (HiPIMS) discharges." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/18833/.

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Reactive HiPIMS discharges have been investigated by employing a selection of plasma diagnostic techniques. Plasma dynamics in a reactive HiPIMS discharge were studied by means of a single Langmuir probe which revealed electron and positive ion densities of the order of 10^17 to 10^18 m^-3 in typical substrate positions, the temporal evolutions of which exhibited a dual-peak structure attributed to the propagation of an ion acoustic wave or the compression and subsequent rarefaction of the process gas caused by the intense 'sputter wind'. The compression phase is also thought to be the cause o

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10

Zhan, Yiyi. "PC-based visual simulation of high pressure arc plasma." Thesis, University of Liverpool, 2011. http://livrepository.liverpool.ac.uk/3433/.

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11

Bless, Frédéric. "Investigation of atmospheric-pressure plasma discharges for thin film deposition." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2050119/.

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Gas-phase polymerisation of different monomers has been studied for an atmospheric plasma jet predominantly using quadrupole mass spectrometry. Thin film depositions were made and analysed using XPS and TOF-SIMS. Time-resolved and time-averaged measurements were performed to understand more deeply the paths of plasma polymerisation at atmospheric pressure and in ambient air. Continuous wave and pulse DC jets were both investigated. Results show the importance of positive ions in polymerisation and support the step growth formation for the creation of heavy oligomers. Negative ions are also imp

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12

Badaye, Massoud. "Investigation and improvement of a Z-pinch plasma X-ray source." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39468.

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A thorough investigation of a pulsed plasma x-ray source is presented with the intent of improving its design and maximizing its x-ray emission efficiency. In this approach a hollow gas column is puffed in the z-pinch diode by magnetically ionizing and compressing an inert gas in an annular plenum. This gas column is preionized by the radiation coming out from the plasma in the plenum and pinched by a fast electrical discharge.<br>It is shown that the system can be improved considerably by modifying the gas puff design. Three gas puffs developed in this work are optimized for x-ray emission fr

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13

Park, Chunyoung. "Feasibility of low energy plasma torch for reaction control thruster ignition." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1587917.

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<p> A DC–thermal plasma jet is proposed as a reliable ignition source for reaction control system (RCS) thrusters employing oxygen with hydrocarbons, like methane. Industrial plasma torch systems are analyzed to understand the behavioral characteristics of DC–thermal plasmas. Nitrogen is used as a working gas for the source of plasma jet to understand the general mechanism of thermal plasma formation. DC–thermal plasmas require high electrical energy to maintain their arc discharge status which presents challenges in space systems. The purpose of this study is, therefore, to

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14

Nowlin, Robert Nathaniel 1966. "The electrostatic nature of contaminative particles in a semiconductor processing plasma." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277802.

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Two models are presented to describe the immediate environment surrounding negatively charged contaminants in an idealized plasma. The first model uses Poisson's equation to determine the contaminant charge and voltage. This model predicts a critical radius of 40 microns or less below which Poisson's equation is no longer valid. For contaminant radii less than 40 microns, the Coulomb potential is used to find the contaminant charge and voltage. Both models predict negative charges on the order of 10-14 Coulombs, and voltages on the same order of magnitude as the electron energy.

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15

Mani, Mahesh Kumar. "Development of Fe-50Co alloy and its composites by spark plasma sintering." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/60869/.

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Composite strengthening was attempted to improve the mechanical strength and toughness of the brittle near equiatomic Fe-Co alloy. The matrix alloy chosen for this research falls in the Fe-(30-50) Co group, which are known for their highest saturation induction (B-sat) and Curie temperature among the commercial soft magnetic alloys. The reinforcements, which exhibited a wide range of aspect ratios, included SiC particulates, SiC whiskers and carbon nanotubes (CNTs). In order to minimize the interfacial reaction between the reinforcements and the Fe-50Co alloy (matrix) and to realise higher com

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16

Han, Yisong. "Microstructural characterisation of GaMnN ferromagnetic semiconductors grown on (001) oriented GaAs substrates by plasma assisted molecular beam epitaxy." Thesis, University of Nottingham, 2006. http://eprints.nottingham.ac.uk/10332/.

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GaMnN layers grown by plasma assisted molecular beam epitaxy (PAMBE) as a function of Ga/N ratio, Mn flux and growth temperature are assessed using a variety of structural characterisation techniques. At 680 C, the Ga/N ratio is found to have a dominant impact on the zinc-blende GaMnN epilayer growth rate and the resultant composition, morphology and microstructure. A maximum growth rate and an optimised microstructure are associated with growth under slightly Ga-rich conditions. A reduced growth rate and enhanced Mn incorporation are associated with growth under slightly N-rich conditions. In

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17

Bazaka, Kateryna. "Fabrication and characterization of plasma polymer thin films from monoterpene alcohols for applications in organic electronics and biotechnology." Thesis, James Cook University, 2011. http://researchonline.jcu.edu.au/29891/.

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After more than twenty years of basic and applied research, the use of nanotechnology in the design and manufacture of nanoscale materials is rapidly increasing, particularly in commercial applications that span from electronics across renewable energy areas, and biomedical devices. Novel polymers are attracting significant attention for they promise to provide a low−cost high−performance alternative to existing materials. Furthermore, these polymers have the potential to overcome limitations imposed by currently available materials thus enabling the development of new technologies and applica

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18

Kang, Jungwon 1967. "The particle trap and plasma parameter studies in an RF argon discharge." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288834.

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Low pressure plasma discharges have been an important process in the manufacturing of microelectronics devices since the late seventies. Therefore, the knowledge and control of the physical and chemical phenomena in plasmas are important for reactor design and process development. In order to understand the process, it is necessary to be able to make accurate measurements of plasma parameters, such as charged particle density, electron temperature, and ion energy. There are three objectives in this research; the first objective is to develop a new automatic electrostatic probe system in order

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19

Ramamurti, Rahul. "Synthesis of Diamond Thin Films for Applications in High Temperature Electronics." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1145630189.

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20

Kline, John L. "Slow wave ion heating and parametric instabilities in the HELIX helicon source." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2292.

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Thesis (Ph. D.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains viii, 176 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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21

Dehili, Chafika. "Using plasma polymerised allylamine to culture hepatocytes in in-vitro fluidic bioreactors." Thesis, University of Nottingham, 2008. http://eprints.nottingham.ac.uk/13488/.

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Tissues constituting mammalian organisms are finitely organised 3-D multicellular structures where cell-cell and cell-matrix interactions are important modulators of functionality. The liver, being the site of metabolism in mammals, is extensively employed in in-vitro studies such as toxicology, drug testing and liver replacement. Most existing liver models have been static, homogenous 2-D models which have shown limited morphological and functional characteristics of in-vivo liver. With the improved understanding of the liver, these models became more sophisticated to comprise various liver a

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22

Balkey, Matthew M. "Optimization of a helicon plasma source for maximum density with minimal ion heating." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1686.

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Thesis (Ph. D.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains v, 127 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 94-98).

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23

Ciaralli, Simone. "A study of the lifetime of miniaturized ablative pulsed plasma thrusters." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/379251/.

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Miniaturized satellites are one of the fastest growing sectors in the space industry, allowing cheap access to space. These satellites are currently limited by their lack of orbit control and their lifetime is therefore determined by the natural, drag-induced, de-orbiting. These issues can be solved using a dedicated propulsion system. Cold-gas micro-thrusters, successfully flown on miniaturized satellites, are characterised by a very low specific impulse (typically less than 100 s), which considerably limits their capabilities. Moreover, they require pressurized tanks, pressure regulators and

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24

Morys, Marcin M. "Patch antenna characterization in a high-voltage corona plasma." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50324.

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In order to improve efficiency and reliability of the world's power grids, sensors are being deployed for constant status monitoring. Placing inexpensive wireless sensors on high-voltage power lines presents a new challenge to the RF engineer. Large electric field intensities can exist around a wireless sensor antenna on a high-voltage power line, leading to the formation of a corona plasma. A corona plasma is a partially ionized volume of air formed through energetic electron-molecule collisions mediated by a strong electric field. This corona can contain large densities of free electrons whi

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25

Coulombe, S. (Sylvain). "A model of the electric arc attachment on non-refractory (cold) cathodes /." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34710.

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In this work, a physical model describing the electric arc attachment on electron emitting non-refractory (cold) cathodes is developed and applied to Cu, Fe and Ti cathodes. The model considers the possibility of a pressure build up in the cathode region due to the strong vaporization of the cathode, the formation of a cathode sheath according to the Bohm's model, and the ion-enhanced thermo-field emission of electrons by the cathode surface. The self-sustaining operating conditions of the discharge are defined by two simple criteria based on particle and energy balance considerations. Results

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26

Intini, Marques Rodrigo. "A mechanism to accelerate the late ablation in pulsed plasma thrusters." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/67314/.

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Pulsed Plasma Thrusters (PPTs) are long standing electric propulsion thrusters that are reliable, relatively simple and low cost. One of the main issues with the PPT is its poor utilization of the propellant and low efficiency. Typically only 40-60% of the propellant contributes to the production significant impulse and the efficiency is around 8%. The cause of the PPT’s poor propellant utilization is the late time ablation (LTA), which has a major impact on the efficiency. LTA is the sublimation of propellant that takes place after the main discharge, due to the propellant, usually Polytetraf

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27

El, Hamoui Mohamad A. "A Pipeline Analog-To-Digital Converter for a Plasma Impedance Probe." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/287.

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Space instrumentation technology is an essential tool for rocket and satellite research, and is expected to become popular in commercial and military operations in fields such as radar, imaging, and communications. These instruments are traditionally implemented on printed circuit boards using discrete general-purpose Analog-to-Digital Converter (ADC) devices and other components. A large circuit board is not convenient for use in micro-satellite deployments, where the total payload volume is limited to roughly one cubic foot. Because micro-satellites represent a fast growing trend in satellit

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28

Letal, Gregory. "Integrated distributed feedback lasers and electroabsorption modulators fabricated using helium-plasma-assisted InP defect induced quantum well intermixing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0033/NQ66279.pdf.

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29

Jobanputra, Manish C. "Investigation of Organic Thin Films for Application in Electro-Optic Devices." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1017755544.

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30

Gustavsson, Lars-Erik. "Hollow Cathode Deposition of Thin Films." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6925.

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31

Mishra, Ritwik. "Photoresist development on SiC and its use as an etch mask for SiC plasma etch." Thesis, Mississippi State : Mississippi State University, 2002. http://library.msstate.edu/etd/show.asp?etd=etd-06162002-205803.

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32

Dainese, Matteo. "Plasma assisted technology for Si-based photonic integrated circuits." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148.

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33

Mosbacker, Howard L. IV. "Control of Electrical Transport Mechanisms At Metal-Zinc Oxide Interfaces By Subsurface Defect Engineering With Remote Plasma Treatment." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204733572.

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34

Ronchi, Emanuele. "Neural Networks Applications and Electronics Development for Nuclear Fusion Neutron Diagnostics." Doctoral thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-108583.

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This thesis describes the development of electronic modules for fusion neutron spectroscopy as well as several implementations of artificial neural networks (NN) for neutron diagnostics for the Joint European Torus (JET) experimental reactor in England. The electronics projects include the development of two fast light pulser modules based on Light Emitting Diodes (LEDs) for the calibration and stability monitoring of two neutron spectrometers (MPRu and TOFOR) at JET. The particular electronic implementation of the pulsers allowed for operation of the LEDs in the nanosecond time scale, which i

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35

Collins, Sean Michael 1959. "Electrode material and geometry effects on the electrical properties of particle traps in a parallel plate plasma etch reactor." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278287.

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A newly designed Langmuir probe has been evaluated and was used to map the plasma potential near the powered electrode of a plasma etch chamber in 2 dimensions. Various electrode materials and geometries were used in order to investigate the relationship between electrode design and the presence of localized regions of elevated plasma potential. These regions of elevated plasma potential were known to be responsible for the presence of particle clouds suspended in the plasma during operation. A relationship was established between sharp edges on the powered electrode, insulating materials on t

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36

Fourmond, Erwann. "Contribution au photovoltaïque de première génération : du matériau silicium aux couches diélectriques." Habilitation à diriger des recherches, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00660319.

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Le photovoltaïque est un secteur industriel en pleine expansion depuis la fin des années 90, avec une croissance de 30 à 40% de la production par an. Les activités de recherches présentées dans le cadre de cette HDR constituent un accompagnement au développement et à l'amélioration des performances des cellules photovoltaïques en silicium cristallin. La première partie concerne les propriétés du silicium " photovoltaïque ", qui présente des concentrations en impuretés plus élevées que le silicium utilisé en microélectronique. Nous abordons le principe de la purification par plasma réactif, per

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37

Kulish, Viktor Vasylovych, Виктор Васильевич Кулиш, Віктор Васильович Куліш та ін. "Квадратично-нелинейная теория параметрического резонанса пучковых волн в двухскоростном электронном пучке". Thesis, Изд-во СумДУ, 2009. http://essuir.sumdu.edu.ua/handle/123456789/4123.

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38

Rao, Arun J. "Analog Front-End Design Using the gm/ID Method for a Pulse-Based Plasma Impedance Probe System." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/675.

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The Plasma Impedance Probe (PIP) is an electronic instrument that measures the impedance of a dipole antenna immersed in a plasma environment. Measurements made by the PIP provide valuable information regarding the plasma environment. Knowledge of ionospheric plasma density and density disturbances is required to understand radio frequency communication with satellites. The impedance curve provides us with significant plasma characteristics such as the electron-neutral collision frequency and plasma electron density. The work proposed here is a transistor-level implementation of the analog fro

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Ongkodjojo, Ong Andojo. "Electrohydrodynamic Microfabricated Ionic Wind Pumps for Electronics Cooling Applications." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1354638816.

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40

Burnham, Shawn David. "Improved understanding and control of Mg-doped GaN by plasma assisted molecular beam epitaxy." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06122007-133821/.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Doolittle, W. Alan, Committee Chair ; Ferguson, Ian T., Committee Member ; Cressler, John D., Committee Member ; Dorsey, John F., Committee Member ; Carter, W. Brent, Committee Member.

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Matthews, Jason E. "Thermoelectric and Heat Flow Phenomena in Mesoscopic Systems." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/12108.

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xvii, 189 p. ： ill. (some col.)<br>Low-dimensional electronic systems, systems that are restricted to single energy levels in at least one of the three spatial dimensions, have attracted considerable interest in the field of thermoelectric materials. At these scales, the ability to manipulate electronic energy levels offers a great deal of control over a device's thermopower, that is, its ability to generate a voltage due to a thermal gradient. In addition, low-dimensional devices offer increased control over phononic heat flow. Mesoscale geometry can also have a large impact on both electron

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42

Surdu-Bob, Carmen Cristina. "Surface : plasma interactions in GaAs subjected to capacitively coupled RF plasmas." Thesis, Aston University, 2002. http://publications.aston.ac.uk/8000/.

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Surface compositional changes in GaAs due to RF plasmas of different gases have been investigated by XPS and etch rates were measured using AFM. Angular Resolved XPS (ARXPS) was also employed for depth analysis of the composition of the surface layers. An important role in this study was determination of oxide thickness using XPS data. The study of surface - plasma interaction was undertaken by correlating results of surface analysis with plasma diagnosis. Different experiments were designed to accurately measure the BEs associated with the Ga 3d, Ga 2P3/2 and LMM peaks using XPS analysis and

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43

Le, roux Frédéric. "Développement de procédés de gravure plasma sans dommage pour l'électronique de puissance à base de GaN." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT017.

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En électronique de puissance, le GaN est devenu un matériau de choix : il répond à des enjeux de haute performance énergétique, tout en favorisant une compacité et une légèreté des composants. Lors de la fabrication de dispositifs de puissance basés sur une hétérostructure AlGaN/GaN, la gravure plasma induit des dégradations dans le matériau et réduit les propriétés électroniques des composants notamment les diodes et les HEMT (High Electron Mobility Transistors). Ces travaux de thèses se sont focalisés sur l’étude de ces dégradations et proposent des procédés de gravure industrialisables qui

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44

Jusoh, Tajudin Mohd Taufik. "Study and design of reconfigurable antennas using plasma medium." Phd thesis, Université Rennes 1, 2014. http://tel.archives-ouvertes.fr/tel-01060295.

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Plasma is the 4th state of matter with complex permittivity that can be exploited to give advantages in communication system. Its negative permittivity has been studied in many research papers and it was proven to have similar characteristics as metal material in terms of electrical conductivity. While keeping permeability in the positive region, plasma will respond to electromagnetic waves in the similar manner as metal. Therefore, this thesis aimed to use plasma as an alternative to metal in the construction of reconfigurable antennas. The first part of this thesis is dedicated to characteri

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45

Cross, Lee W. "Design of Microwave Front-End Narrowband Filter and Limiter Components." Thesis, The University of Toledo, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3588122.

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<p> This dissertation proposes three novel bandpass filter structures to protect systems exposed to damaging levels of electromagnetic (EM) radiation from intentional and unintentional high-power microwave (HPM) sources. This is of interest because many commercial microwave communications and sensor systems are unprotected from high power levels. Novel technologies to harden front-end components must maintain existing system performance and cost. The proposed concepts all use low-cost printed circuit board (PCB) fabrication to create compact solutions that support high integration.</p><p> Th

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46

Jeon, Taewoo. "Cellules solaires hybrides à base de polymères et de nanofils de silicium fabriqués par dépôt chimique en phase vapeur assisté par plasma." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00917826.

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Les cellules photovoltaiques proposent une solution au problème énergétique en raison de leur source inépuisable: le soleil. Plusieurs types de cellules, qu'elle soient inorganiques ou organiques, sont étudiées, avec comme objectif d'obtenir de hauts rendements pour de faibles coûts. Dans ce contexte, ce travail de thèse se propose d'étudier des cellules solaires hybrides nanostructurées à base de nanofils de silicium et de matériaux organiques afin de bénéficier des avantages de ces différents matériaux. La morphologie controlée de la croissance des nanofils de silicium par dépôt chimique en

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Saint-Aubin, Christine de. "Conception de nouveaux matériaux conducteurs extensibles à base de multicouches de polyélectrolytes sur support silicone." Thesis, Mulhouse, 2013. http://www.theses.fr/2013MULH8652/document.

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Cette thèse propose tout d’abord une méthode originale, appelée 2 en 1, de construction contrôlée, couche-par-couche, de films de polyélectrolytes, basée sur le dépôt d’un unique complexe polycation-polyanion. Détaillée dans le cas du poly(éthylènedioxythiophène)-poly(styrènesulfonate) PEDOT-PSS, la méthode est ensuite étendue avec le même succès à d’autres complexes (poly(éthylèneimine) branché-poly(4 styrènesulfonate), poly(diallyldiméthylammonium)-poly(4 styrènesulfonate) et poly(allylamonium)-poly(4 styrènesulfonate)).Les films 2 en 1 de PEDOT PSS sont robustes vis-à-vis d’un recuit thermi

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Pezeril, Maxime. "Développement d'un procédé de gravure par plasma pour les transistors de puissance à base de matériaux III-V." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALT049.

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Dans le secteur de l’électronique de puissance, le Nitrure de Gallium (GaN) émerge comme un matériau prometteur grâce à ses qualités intrinsèques, en particulier son grand gap et sa tenue à fortes tensions. Les transistors qui l’utilisent, appelés HEMT (High Electron Mobility Transistors), reposent sur une propriété particulière d’une hétérostructure AlGaN/GaN: un canal bi-dimensionnel (2DEG). Les différentes technologies sont encore en développement et font face à différentes problématiques liées aux étapes critiques du procédé de fabrication des composants. L’une de ces étapes est la gravure

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Mouawad, Bassem. "Assemblages innovants en électronique de puissance utilisant la technique de " Spark Plasma Sintering "." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00943438.

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L'augmentation des températures de fonctionnement est une des évolutions actuelles de l'électronique de puissance. Ce fonctionnement entraine d'une part des changements de la structure des modules de puissance notamment des structures " 3D " pour assurer un refroidissement double face des composants de puissance, et d'autre part l'utilisation de matériaux qui permettent de réduire des contraintes thermomécaniques, liées à la différence de coefficient de dilatation des matériaux, lors d'une montée en température. Le travail réalisé au cours de cette thèse consiste à développer une nouvelle stru

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Aliyeva, Tamila. "Production Of Hydrogenated Nanocrystalline Silicon Based Thinfilm Transistor." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612209/index.pdf.

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The instability under bias voltage stress and low mobility of hydrogenated amorphous silicon (a-Si:H) thin film transistor (TFT), produced by plasma enhanced chemical vapor deposition (PECVD) technique, are the main problems impeding the implementation of active matrix arrays for light emitting diode display panels and their peripheral circuitry. Replacing a-Si:H by hydrogenated nanocrystalline silicon film (nc-Si:H) seems a solution due to its higher mobility and better stability. Therefore nc-Si:H TFT was produced and investigated in this thesis. All TFT layers (doped nc-Si:H, intrinsic nc-S

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