Dissertations / Theses on the topic 'LPCVD'
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Cordier, Céline. "Modélisation des dépôts LPCVD de SIPOS." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT017G.
Full textKRISHT, MUHAMMED HUSSEIN, and MUHAMMED HUSSEIN KRISHT. "LPCVD TUNGSTEN MULTILAYER METALLIZATION FOR VLSI SYSTEMS." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187983.
Full textRodolpho, Augusto Cesar. "Contribuição a simulação computacional do processo de LPCVD." [s.n.], 1990. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259953.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica
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Resumo: Este trabalho foi dedicado ao estudo e simulação do processo de LPCVD-Deposição Químka à partir da Fase Vapor sob Baixa Pressão. A deposição de silício por decomposição pirolítka de silana foi tomada como reação básica devido à sua importância e simplicidade, sem contudo perder-se a generalidade do tratamento adotado. Inkialmente é apresentado o processo de CVD à pressão atmosférica, como entendido pela teoria da camada limite. A seguir é discutido o processo de LPCVD. A textura do filme depositado e os micromecanismos de reação são analisados, o que leva à uma equação para a taxa de reação. Através de equações apropriadas são identificados os fatores principais que influenciam a uniformidade axial (de lâmina para lâmina) e radial (em uma lâmina) do filme depositado. Assumindo as restrições: (i) não há gradiente radial de temperatura, (ii) o crescimento é limitado por cinética de superfície e (iii) o transporte é realizado por fluxo laminar na região entre as paredes do reator e as lâminas e por difusão gasosa na região entre-lâminas, é sugerido um modelo para simulação de LPCVD, que considera: (a) a região vazia de entrada, (b) a expansão molar do gás e (c) a depleção de reagentes ao longo da direção principal do fluxo. O modelo desenvolvido apresentou resultados satisfatórios, tempo de computação bastante reduzido e um tratamento matemático mais simples que aqueles encontrados na literatura, modelos estes que utilizaram as mesmas restrições e considerações (i}-(iii) e (a)-(c). Finalmente as tendências em CVD são apresentadas e discutidas. Tendências estas que apontam para sistemas do tipo lâmina única, de paredes frias, com monitoração in situ e intenso controle computadorizado
Abstract: This work deals with the study and simulation of LPCVD-Low Pressure Chemical Vapour Deposition- a basic process for thin film deposition. The reaction of silicon deposition by silane pyrolisis is adopted for its simplicity and importance without sacrifieing the quality of treatment. To begin with, we present the atmospheric presure CVD technique in the light of the boudary layer theory. Later we discuss the LPCVD process. The texture of the film deposited and the micromechanisms of the said reaction are analysed, as a function of the inputs. Using the derived equations, we identify the main factors that influence the axial homogeneity (wafer to wafer) as well as the radial homogeneity (within the wafer) df the deposited filmo Assuming the restrictions: i) there is no radtial temperature gradient, ii) the growth is limited by surface kinetics, and iii) transport is due to a laminar flow in the annular region and gaseous diffusion in the space intra-wafers, an interesting model is sugested to the simulation of the batch type, hot wall, LPCVD reactor, taking into account: (a) the empty inlet tube, (b) the molar expansion of the gas, and (c) the depletion of reactants along the main flow direction. The developed method of simulation provides satislactory results with reduced computer processing time and a rather simpler mathematical evaluation when compared with proposed models in literature, using the same restrictions and conditions. Finally, the future trends in CVD processing are in brief presented. They point to single wafer, cold wall, photo- and plasma assisted systems with in situ measurements and intense computerized control
Mestrado
Pinto, Emilio Sergio Marins Vieira. "Sintese e caracterização de nanocristais de Ge por LPCVD." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259199.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
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Resumo: Nesta dissertação estudamos a obtenção de nanocristais (NCs) de Ge pela técnica de LPCVD (Low Pressure Chemical Vapor Deposition), buscando otimizar as condições de processo que resultassem em NCs com características de tamanho, densidade por unidade de área e uniformidade de tamanhos, que são necessárias para aplicação em dispositivos de memórias de porta flutuante. Os NCs foram fabricados por processo de dois passos: 1) formação de núcleos de Si na superfície do SiO2, a partir de silana (SiH4); 2) crescimento de Ge sobre os núcleos de Si através de deposição de germana (GeH4). Realizamos ciclos de deposição e caracterização das amostras, e os parâmetros de processo: temperatura, pressão total, fluxos de silana e germana e tempo de deposição, foram alterados convenientemente, com base na literatura e nos resultados obtidos a cada ciclo de fabricação. As amostras foram caracterizadas quanto à morfologia, por microscopia de força atômica (AFM) e a estrutura dos NCs foi analisada por microscopia eletrônica de transmissão de alta resolução (HRTEM). Estudamos a influência dos parâmetros de processo nas características dos NCs e observamos tendências de aumento da densidade de NCs com a elevação da temperatura, pressão total e fluxo de SiH4 do passo 1. E, o tamanho dos NCs tendem a diminuir com a redução da temperatura, pressão total e tempo de deposição do passo 2. Os resultados mostram que com os parâmetros: 600 ºC / 5 Torr / 20 sccm de SiH4 / 20 seg. para a nucleação de Si e 550 ºC / 2 Torr / 5 sccm / 30 seg. para a deposição de Ge, é possível obter alta densidade de NCs por unidade área de 4x1010 NCs/cm2 com diâmetro médio de 19 nm e altura média de 4,5 nm
Abstract: In this thesis we studied the synthesis of Ge nanocrystals (NCs) by the LPCVD technique (Low Pressure Chemical Vapor Deposition). We looked for NCs with characteristics of sizes, density and uniformity of sizes that are necessary for applications in floating gate memory devices. To reach those characteristics we have optimized the process conditions. The NCs were fabricated by a process of two steps: 1) formation of Si nuclei on SiO2 surface, through the silane (SiH4) decomposition; 2) Ge growth on Si nuclei through germane (GeH4) deposition. We accomplished deposition cycles and characterization of the samples. The process parameters: temperature, total pressure, silana and germana flow and deposition time, were altered conveniently based on the literature and results obtained at each production cycle. The morphology of the samples was analyzed by atomic force microscopy (AFM) and the NCs structures were analyzed by high resolution transmission electron microscopy (HRTEM). We studied the influence of the process parameters in the NCs characteristics and we have observed tendencies of NCs density increase with rise of the temperature, total pressure and SiH4 flow of step 1. The NCs size tends to decrease with the reduction of temperature, total pressure and deposition time of step 2. The results show that with the parameters: 600 ºC / 5 Torr / 20 sccm de SiH4 / 20 sec. for the Si nucleation and 550 ºC / 2 Torr / 5 sccm / 30 sec. for the Ge deposition, it¿s possible to reach a high density of NCs (4x1010 NCs/cm2) with diameter of 19 nm and average height of 4,5 nm
Mestrado
Eletrônica, Microeletrônica e Optoeletrônica
Mestre em Engenharia Elétrica
Boukezzata, Messaoud. "Mecanismes d'oxydation des si-lpcvd fortement dopes au bore." Toulouse 3, 1988. http://www.theses.fr/1988TOU30183.
Full textTrainor, Michael. "Studies of low pressure chemical vapour deposition (LPCVD) of polysilicon." Thesis, University of Strathclyde, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291988.
Full textBoukezzata, Messaoud. "Mécanismes d'oxydation des films Si-LPCVD fortement dopés au bore." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612180t.
Full textRen, Yuxing. "Experiments on the elastic size dependence of LPCVD silicon nitride /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?MECH%202004%20REN.
Full textZahi, Ilyes. "Modélisation multi-échelles des mécanismes de nucléation/croissance lors de la synthèse de nanoplots de silicium par LPCVD pour les nouvelles générations de mémoires non volatiles." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT017G/document.
Full textThe need of high integrated systems of the everyday life involves a permanent evolution of the microelectronic industry. Integrated circuits involving non volatile Flash memories are good examples of these trends. In this technology, the poly-silicon floating gate could be replaced by a discrete trap floating gate in which discrete traps are made up of silicon nanodots. The synthesis of nanodots by LPCVD (Low Pressure Chemical Vapor Deposition) from silane SiH4 on SiO2 surfaces remains one of the most promising ways of industrial synthesis. Despite a huge experimental effort, fundamental understanding of the key mechanisms of nanodots nucleation and growth remains elusive. Here we find the main objectives of the thesis. For nucleation, our main results reveal that only silylene SiH2 is involved in the very first steps of nucleation. The incubation time experimentally observed can be explained by the low SiH2 concentration and the first slow H2 desorption process. For growth, silane is the main responsible for deposition, which explains the autocatalytic behaviour of silicon deposition. The growth limiting step is clearly the H2 desorption process. Comparisons between experimental and multiscale modelling allow to explain why classical kinetics of the literature overestimate nanodots deposition rate. We have found that the silicon deposition rate is higher on nanometer silicon dots than on a continuous silicon film. Key parameters to conveniently model nanodots deposition are good descriptions of the first chemisorption sites and of the H2 desorption process
Fayolle, Francine. "Analyse et modélisation des dépots d'oxyde de silicium par procédé LPCVD." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT029G.
Full textRey, Jacques. "Depots par lpcvd de carbures de bore sur cermets wc-co." Limoges, 1988. http://www.theses.fr/1988LIMO0008.
Full textHewitt, Susan B. (Susan Barbara) 1965 Carleton University Dissertation Engineering Electronics. "Silicon carbide emitter diode formed by LPCVD from di-tertiary- butylsilane." Ottawa.:, 1993.
Find full textMcCann, Michelle Jane, and michelle mccann@uni-konstanz de. "Aspects of Silicon Solar Cells: Thin-Film Cells and LPCVD Silicon Nitride." The Australian National University. Faculty of Engineering and Information Technology, 2002. http://thesis.anu.edu.au./public/adt-ANU20040903.100315.
Full textBarathieu, Patrick. "Modélisation cinétique et analyse structurale des dépôts de sipos élaborés par LPCVD." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT047H.
Full textIsrael, Mahmoud. "Croissance et caracterisation de nanofils de Si et Ge." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S062/document.
Full textThis work deals with the growth and characterization of silicon (Si) and germanium (Ge) nanowires. The nanowires were synthesized by the growth mechanism VLS (Vapor Liquid Solid) in a LPCVD reactor (Low Pressure Chemical Vapor Deposition) using gold (Au) as the catalyst and silane (SiH4) and germane (GeH4) as precursor gas. In order to grow nanowires, the Au catalyst must be nano-structured in the form of nano-particles with controlled diameter if possible. This is done in this study by “dewetting” of a continuous layer evaporated on the chosen substrate. The thickness of this initial continuous layer is an essential parameter in the study. A preliminary part of this work deals with the problem of how the “dewetting” occurs, depending on various parameters (type of substrate, temperature, pressure, thickness of the continuous gold layer, growth duration and “dewetting” temperature) that control the LPCVD growth process. We varied these process parameters over wide ranges to determine how the influence the properties of Ge nanowires grown. The structural characterization of nanowires by transmission electron microscopy shows their single crystal structure with growth direction along <111> in the case of Si nanowires and along <110> for Ge nanowires. Finally, in the case of conical Ge nanowires isolated and deposited on different substrates, the micro-Raman analysis allowed us identifies an optical resonance phenomenon inside the nanowires which strongly depends on their local diameter. The Raman intensity increases with the decrease of volume excited. These effects are explained by the optical modes appearing according to the local diameter of the nanowire, the excitation wavelength and the nature of the substrate used. In addition, the Raman lines recorded along the same profiles did not show any spectral shift, reinforcing the idea that the behavior of their intensity has to be related to resonances associated with the development of local optical modes. These effects were observed to be dependent upon the type of substrate on which the isolated nanowires were transferred (dielectric versus metallic substrates). No effect of the confinement of phonon mode in our nanowires was observed
Teixeira, Ricardo Cotrin. "Implementação de um sistema LPCVD vertical para obtenção de filmes finos de silicio policristalino." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260110.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica
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Mestrado
Lee, Yung-Huei. "Dual-carrier charge transport and damage formation of LPCVD nitride for nonvolatile memory devices /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487322984316841.
Full textKis, Sion King. "Études et réalisation de cellules photovoltaïques en silicium polycristallin dépose sur verre par LPCVD." Rennes 1, 1997. http://www.theses.fr/1997REN1S197.
Full textPierre, Fabien. "Etude du remplissage de tranchées profondes par du silicium polycristallin." Rennes 1, 2002. http://www.theses.fr/2002REN10153.
Full textGUILLEMET, JEAN-PAUL, and B. PIERAGGI. "Mecanismes de cristallisation en phase solide de films minces de silicium amorphe deposes par lpcvd." Paris 11, 1994. http://www.theses.fr/1994PA112239.
Full textLAGHLA, YAHYA. "Elaboration et caracterisation de couches minces de silicium polycristallin deposees par lpcvd pour application photovoltique." Toulouse 3, 1998. http://www.theses.fr/1998TOU30117.
Full textMaritan, Cheryl M. (Cheryl Maureen) Carleton University Dissertation Engineering Electrical. "LPCVD deposition of in-situ boron-doped polysilicon and its use in polysilicon emitter transistors." Ottawa, 1987.
Find full textMartin, de Nicolas Silvia. "a-Si : H/c-Si heterojunction solar cells : back side assessment and improvement." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112253/document.
Full textAmongst available silicon-based photovoltaic technologies, a-Si:H/c-Si heterojunctions (HJ) have raised growing attention because of their potential for further efficiency improvement and cost reduction. In this thesis, research on n-type a-Si:H/c-Si heterojunction solar cells developed at the Institute National de l’Énergie Solaire is presented. Technological and physical aspects of HJ devices are reviewed, with the focus on the comprehension of the back side role. Then, an extensive work to optimise amorphous layers used at the rear side of our devices as well as back contact films is addressed. Through the development and implementation of high-quality intrinsic and n-doped a-Si:H films on HJ solar cells, the needed requirements at the back side of devices are established. A comparison between different back surface fields (BSF) with and without the inclusion of a buffer layer is presented and resulting solar cell output characteristics are discussed. A discussion on the back contact of HJ solar cells is also presented. A new back TCO approach based on boron-doped zinc oxide (ZnO:B) layers is studied. With the aim of developing high-quality ZnO:B layers well-adapted to their use in HJ devices, different deposition parameters as well as post-deposition treatments such as post-hydrogen plasma or excimer laser annealing are studied, and their influence on solar cells is assessed. Throughout this work it is evidenced that the back side of HJ solar cells plays an important role on the achievement of high efficiencies. However, the enhancement of the overall device performance due to the back side optimisation is always dependent on phenomena taking place at the front side of devices. The use of the optimised back side layers developed in this thesis, together with improved front side layers and a novel metallisation approach have permitted a record conversion efficiency over 22%, thus demonstrating the great potential of this technology
Cocheteau, Vanessa. "Synthèse de plots quantiques de silicium par LPCVD pour les nouvelles générations de mémoires non volatiles." Phd thesis, Toulouse, INPT, 2005. http://oatao.univ-toulouse.fr/7113/1/cocheteau.pdf.
Full textBhattacharyya, S. "Fabrication of strained and relaxed Si and SiGe by LPCVD for application in novel SOI technology." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411061.
Full textNowrozi, Mojtaba Faiz. "A systematic study of LPCVD refractory metal/silicide interconnect materials for very large scale integrated circuits." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184396.
Full textKleimann, Pascal. "Réévaluation des propriétés piézoresistives à haute température de films de silicium polycristallin LPCVD dopé au bore." Lyon, INSA, 1997. http://www.theses.fr/1997ISAL0019.
Full textThe use of the piezoresistive properties of polycristalline silicon (which are responsible for a change in the resistivity when a mechanical force is applied to the semiconductor) in the framework of high temperature pressure microsensors, requires the investigation of the thermal drifts of these properties in order to improve sensors performances. We have tackled this work by a study of the physical origin of the piezoresistive properties in monocrystalline silicon. This study led us to reassess the piezoresistive properties of monocrystalline silicon, in order to explain the difference frequently observed between the longitudinal gauge factor and the transversal one. Then we have presented a complete mode! Of transport properties in polysilicon based on the well-known carrier tapping model and considering a grain boundary potential barrier, the tunnel effect through the barrier and the case of degenerated polysilicon. Studying the mechanical strain effect on the polysilicon resistivity, we have deduced the piezoresistive properties of this material, taking into account the potential barrier effect. In the third part, we have described the experimental set up that has been developed in order to measure the electrical and piezoresistive properties of polysilicon films between room temperature and 20ooc. The conduction and piezoresistif models have been validated on two series of LPCVD polysilicon films: The first one was deposited at 620°C and the second one at 580°C in order to obtain larger grain size after crystallization. A good agreement between theoretical and experimentally determined resistivities and gauge factors is observed for the two types of polysilicon materials considering different grain sizes. The results clearly show a significant piezoresistive effect of the potential barrier. At last, we have applied the results to estimate the thermal drifts of the sensitivity of a piezoresistive pressure microsensor, using polysilicon as transducing material
Mercaderre, Lydie. "Proprietes cristallines et electroniques des depots de silicium lpcvd dopes in-situ (dopants bore et phosphore)." Toulouse, INSA, 1988. http://www.theses.fr/1988ISAT0009.
Full textGris, Hervé. "Etude du recouvrement de marché lors de dépôts lpcvd dans des tranchées submicroniques : expériences et modélisation." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT003G.
Full textPicard, Erwann. "Étude et optimisation d’une étape industrielle de dépôt polysilicium dopé in situ au phosphore par LPCVD." Rennes 1, 2008. http://www.theses.fr/2008REN1S179.
Full textThe manufacturing of microstructures with high aspect ratio (A. R. ) is becoming essential for passives components integration. One of the key steps in theses integrating processes is the filling of 3D structures, realized by an highly phosphorous in situ doped polysilicon (ISDP) by LPCVD method. This thesis is related to the study, the development and the optimization of an industrial ISDP stage through a process that integrates passives structures on 5 and 6 inches wafers. Industrials goals linked to this ISDP stage are following: Fill high AR structures with a good step coverage while realizing high precision resistances. In order to reach fixed goals, the work has been divided in two main parts. The first part concerns theoretical and experimental studies made in order to qualify and quantify most influent parameters of the stage. The second part describes the developing work made and specific improvement methodologies implemented on the ISDP stage
Koukos, Konstantinos. "Vers les sources optiques compatibles CMOS: corrélation entre élaboration et propriétés des nanocristaux de Si pas LPCVD." Phd thesis, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00494388.
Full textKropp, Joel Miron [Verfasser]. "Low-Stress LPCVD Silicon Nitride Membranes and Applications for Physical and Biological Sensor Systems / Joel Miron Kropp." München : Verlag Dr. Hut, 2015. http://d-nb.info/1076437435/34.
Full textBonar, Janet Marion. "Process development and characterization of silicon and silicon-germanium grown in a novel single-wafer LPCVD system." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243179.
Full textAzzaro-Pantel, Catherine. "Analyse et modélisation du fractionnement des réacteurs de LPCVD : cas du silicium pur ou dopé in situ." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT003G.
Full textYacoubi, Khalid. "Dépôt LPCVD de nitrure de silicium à partir d'un mélange silane-ammoniac : analyse et modélisation du procédé." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT053G.
Full textKoukos, Konstantinos. "Vers les sources optiques compatibles CMOS : corrélation entre élaboration et propriétés des nanocristaux de Si par LPCVD." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/858/.
Full textIntegrated systems comprising on-chip optical functions are of great interest for future generations of embedded, telecommunications sensing and instrumentation applications. The feasibility of a Silicon light source, compatible with CMOS technology remains a major hurdle in the development of systems combining optical and electronic functions on the same chip. The use of silicon nanocrystals embedded in a SiO2 matrix seems to be a promising solution. The objective of this work is to study the feasibility of visible/near infrared light sources using silicon nanocrystals obtained by LPCVD (Low Pressure Chemical Vapor Deposition). Starting with a study of the material properties, we chose a bottom-up approach to fabricate several test devices. A reproducible, CMOS compatible technological process has been established to obtain the active material with the desired properties. The mechanisms of light emission have been studied by different characterization techniques and correlated with the structural and electrical properties. We have obtained intense emission under optical excitation in the visible/near infrared domain. Electroluminescence, however, requires a specific optimization of the active layer. We have explored several different implementations and have identified the tradeoffs between optical and electrical properties. At the end of this study, we have evaluated the advantages and disadvantages of LPCVD as a fabrication method for Si nanocrystals and propose solutions for the implementation of a functional electroluminescent device
IDRISSI-BENZOHRA, MALIKA. "Etude des jonctions verticales p+n a emetteur en silicium lpcvd fortement dope in-situ au bore." Rennes 1, 1996. http://www.theses.fr/1996REN10171.
Full textGuendouz, Mohammed. "Cristallisation thermique en phase solide du silicium amorphe, depose par lpcvd : effet de la nature du substrat." Rennes 1, 1990. http://www.theses.fr/1990REN10128.
Full textSemmache, Mohamed-el-Bachir. "Etude du dépôt et des propriétés physiques de couches minces de silicium polycristallin détenu par RT-LPCVD." Lyon, INSA, 1994. http://www.theses.fr/1994ISAL0068.
Full textThis work was devoted to the study of the deposition of polycristalline silicon films (polysilicon) obtained by low-pressure chemical vapor deposition in a coldwall RTP reactor (RT-LPCVD). Ths films were synthesized by premixed-silane decomposition (SiH4 /Ar : 10%) at variable pressures (l-5 mbar) and temperatures (600-800 C°). These conditions were choosen as a function of the single-wafer (SW) throughout requirements in the production scale. The deposition kinetics were performed on specimen of different sizes and revealed a radial reactive gas depletion inherent to the injection and extraction system geometry used in this study. SIMS analysis revealed the presence of contaminants (0,C) in the films. This contamination was attributed to the chamber thermal desorption during the deposition step. This phenomenon can be strongly reduced by lowering the process pressure and/or introducing a thermal desoprtion cycle before deposition. Grazing X-ray Diffraction, Transmission Electron Microscopy, and sheet resistance measurements all showed that the structural properties (Roughness, texture, grain size), mechanical (residual stresses) and the electrical properties of polysilicon films mainly depend on the deposition parameters and are well correlated to the 0-contamination level. Ex-situ phosphorus-doping (POC13) of the RTCVD polysilicon films showed electrical resistivity values comparable with conventional LPCVD ol silicon films (1mΩ. Cm)
Winkler, Olaf. "Silizium-Nanodots für nichtflüchtige Speicherbauelemente /." Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014901185&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textChen, Lin. "SiC Thin-Films on Insulating Substrates for Robust MEMS-Applications." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1053095076.
Full textO'Hern, Sean C. (Sean Carson). "Development of process to transfer large areas of LPCVD graphene from copper foil to a porous support substrate." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68952.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 57-62).
In this thesis, I present a procedure by which to transfer greater than 25 mm² areas of high-quality graphene synthesized via low-pressure chemical vapor deposition from copper foil to porous support substrates. Large-area, high quality graphene on a porous support would serve as a platform by which to create high efficiency porous graphene membranes for use in liquid and gas-phase separation technologies. In this procedure, we transfer greater than 25 mm² areas of graphene with few holes and tears to both gold Quantifoil Holey Carbon transmission electron microscope grids with 1.2 [mu]m diameter pores and to Sterlitech polycarbonate track etch membranes with 200 nm diameter pores by bonding the substrates to the graphene then wet-etching the copper. The resulting membrane quality is characterized via Raman spectroscopy, scanning electron microscopy, diffraction patterning, and aberration-corrected scanning transmission electron microscopy.
by Sean C. O'Hern.
S.M.
Dutron, Anne-Marie. "Dépots LPCVD de siliciures ternaires Me-Si-N (Me= Re, W, Ti, Ta) pour des applications en microélectronique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0092.
Full textGUILLET, DENIS. "Fabrication et caracterisation de couches minces de silicium-germanium polycristallin deposees par lpcvd application aux transistors films minces." Rennes 1, 2000. http://www.theses.fr/2000REN10053.
Full textLevesque, Alexandra. "Elaboration de couches minces de tantale par dépôt chimique à partir de la phase vapeur TaCl5-H2 et caractérisations structurales et anti-corrosionbTexte imprimé." Paris, ENSAM, 2002. http://www.theses.fr/2002ENAM0011.
Full textTian, Fang. "Studies of LPCVD and anodised TiOâ†2 thin films and their photoelectrocatalytic photochemical properties for destruction of organic effluents." Thesis, University of Strathclyde, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366874.
Full textDenoyelle, Elise. "Développement d’une microbatterie Li-ion 3D & Étude d’une anode de silicium amorphe déposée par LPCVD sur substrat 3D." Caen, 2010. http://www.theses.fr/2010CAEN2005.
Full textSince the first Integrated Circuits, the Semiconductors industry has innovated in the field of miniaturization at the device level. For several years, NXP company has designed sb-SiP systems (silicon-based System in Package) which allow the insertion of passive components into passive devices on which an active device is mounted. The concept depends upon the PICS technology (Passive Integration Connective Substrate) which allows the integration of capacitors of high values. Considering the achievement of this process, NXP wishes to develop new products as 3D Li-ion microbatteries. At first, we developed a partnership approach in order to acquire competences in lithium-ion technology. The different contacts allow us to define more precisely the technological components needed in order to create a 3D-microbattery on silicon substrate. In a second part, we adress the study of an amorphous silicon thin film anode deposited by LPCVD (Low Pressure Chemical Vapor Deposition). The objective of the study is to measure the electrochemical performances of the amorphous silicon anode on 2D and 3D silicon substrate
BAHLOUL, MANSOUR FARIDA. "Effets de la temperature de depot sur la microstructure et les proprietes technologiques des couches si-lpcvd dopees bore." Toulouse 3, 1986. http://www.theses.fr/1986TOU30088.
Full textMansour-Bahloul, Farida. "Effets de la température de dépôt sur la microstructure et les propriétés technologiques des couches Si-LPCVD dopées bore." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37599425p.
Full textChen, Te Yuan, and 陳德原. "Modeling LPCVD for Improved Operation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/06774978675081899832.
Full text國立臺灣大學
化學工程學研究所
94
This work presents a physical model to simulate the film deposition in a batch LPCVD (Low Pressure Chemical Vapor Deposition) reactor for DRAM processing. The objective is to use this model to set proper reacting temperatures for lower defective rate and the higher yield of the process. The reaction kinetics model is based on the literature result, and the parameters are modify by regression to fit experimental data. Two TEOS feed flow rates are considered: 380 sccm and 230 sccm. The process is simulated with different quantity of wafers, 100 pieces and 125 pieces. The simulation results are compared with the experimental date and we find that this model works well. Based on this model, suitable reacting temperature aimed to uniform deposition of films can be predicted individually under the operating conditions aforementioned. In proof of the applicability of this model, the simulation result is also applied to real operating data from different machine platform. The results show that this proposed model is suitable for simulating the film deposition in LPCVD reactor under various TEOS feed flow rate, wafer production rate and machine platform.