Download or read book Modelisation de l implantation ionique dans alpha SiC et application a la conception de composants de puissance written by Erwan Morvan and published by . This book was released on 1999 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MODELISATION DE L IMPLANTATION IONIQUE DANS SIC ET APPLICATION A LA CONCEPTION DE COMPOSANTS DE PUISSANCE written by Erwan Morvan and published by . This book was released on 1999 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'IMPLANTATION IONIQUE EST UNE ETAPE TECHNOLOGIQUE FONDAMENTALE POUR LA FABRICATION DE COMPOSANTS ELECTRONIQUES EN CARBURE DE SILICIUM (SIC). C'EST ACTUELLEMENT LA SEULE TECHNIQUE DE DOPAGE SELECTIF POUR CE SEMICONDUCTEUR CAR L'INCORPORATION DE DOPANTS PAR DIFFUSION THERMIQUE NECESSITE DES TEMPERATURES TRES ELEVEES, INCOMPATIBLES AVEC LES AUTRES ETAPES TECHNOLOGIQUES. L'IMPLANTATION PERMET DE MODIFIER LES PROPRIETES PHYSIQUES, ELECTRIQUES ET OPTIQUES DU SIC. LA PRECISION DE LA DOSE ET DE L'ENERGIE D'IMPLANTATION PERMET DE BIEN CONTROLER LA DISTRIBUTION DES IMPURETES INTRODUITES. L'UTILISATION D'IMPLANTATIONS MULTIPLES A DOSES ET ENERGIES VARIABLES PERMET D'OBTENIR UNE GRANDE VARIETE DE PROFILS D'IMPURETES. AFIN DE MIEUX COMPRENDRE ET D'OPTIMISER LE PROCEDE D'IMPLANTATION DANS LE SIC CRISTALLIN ET AFIN D'ORIENTER LA RECHERCHE, IL EST TRES INTERESSANT DE MODELISER LES PHENOMENES PHYSIQUES MIS EN JEU ET DE SIMULER LES TRAJECTOIRES DES IONS IMPLANTES. UNE ETUDE GENERALE DE LA MODELISATION ET DE LA SIMULATION DE L'IMPLANTATION IONIQUE A ETE REALISEE. A PARTIR DE CETTE ETUDE, UN SIMULATEUR D'IMPLANTATION IONIQUE DANS SIC MONOCRISTALLIN A ETE DEVELOPPE (6H, 4H, 3C). CE SIMULATEUR EST BASE SUR LA METHODE DE MONTECARLO DANS L'APPROXIMATION DES COLLISIONS BINAIRES. DES PROCEDURES DE TABULATION-INTERPOLATION ONT ETE MISES EN UVRE POUR ACCELERER LES SIMULATIONS. APRES VALIDATION A L'AIDE DE PROFILS EXPERIMENTAUX (SIMS), LE SIMULATEUR A ETE UTILISE POUR ETUDIER LES PROFILS D'IMPLANTATIONS MULTIPLES, LE PHENOMENE DE CANALISATION, LA DISPERSION LATERALE DES IMPURETES, LES DEFAUTS CREES PAR L'IMPLANTATION ET LES DEPLACEMENTS DE STCHIOMETRIE. EN COMBINANT LES RESULTATS EXPERIMENTAUX PUBLIES ET LES SIMULATIONS, DES CONDITIONS D'IMPLANTATION (ANGLES D'IMPLANTATION, DOSES ET ENERGIES D'IMPLANTATIONS MULTIPLES) ONT ETE DETERMINEES DANS LE BUT DE FABRIQUER DES ZONES ACTIVES DE COMPOSANTS DE PUISSANCE (EMETTEURS DE DIODES BIPOLAIRES, SOURCE/DRAIN DE MOSFET). POUR RECONSTRUIRE LE CRISTAL ENDOMMAGE PAR L'IMPLANTATION ET ACTIVER LES DOPANTS IMPLANTES, DES RECUITS A HAUTE TEMPERATURE SONT NECESSAIRES. L'ACTIVATION DE AL IMPLANTE A HAUTE ENERGIE A ETE EVALUEE PAR MESURE CAPACITIVE ET CELLE DE N PAR MESURE TLM. DES DIODES BIPOLAIRES P NN + (AL) ET DES MOSFETS LATERAUX (N) ONT ETE FABRIQUEES ET CARACTERISES.

Download or read book Power Electronics Semiconductor Devices written by Robert Perret and published by John Wiley & Sons. This book was released on 2013-03-01 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book relates the recent developments in several key electrical engineering R&D labs, concentrating on power electronics switches and their use. The first sections deal with key power electronics technologies, MOSFETs and IGBTs, including series and parallel associations. The next section examines silicon carbide and its potentiality for power electronics applications and its present limitations. Then, a dedicated section presents the capacitors, key passive components in power electronics, followed by a modeling method allowing the stray inductances computation, necessary for the precise simulation of switching waveforms. Thermal behavior associated with power switches follows, and the last part proposes some interesting prospectives associated to Power Electronics integration.

Download or read book Proceedings of the International Symposium on Power Semiconductor Devices and ICs written by and published by . This book was released on 2000 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mod lisation et Simulation Spice des Composants de Puissance written by Lotfi Messaadi and published by Univ Europeenne. This book was released on 2016-07-07 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le carbure de silicium (SiC) est un materiau semi-conducteur a large bande d'energie interdite. Ce materiau possede des caracteristiques en temperature et une tenue aux champs electriques bien superieures a celles du silicium. Les dispositifs a base de ce materiau (SiC) sont bien adaptes pour fonctionner dans des environnements a haute temperature, haute puissance, haute tension et haute radiation. Ces caracteristiques permettent des ameliorations significatives dans une grande variete d'applications et de systemes de puissance. Dans ce travail on presente des etudes analytiques comparatives des modeles des composants a semi-conducteurs en SiC, ainsi que les principales caracteristiques statiques, dynamiques, et thermiques des meilleurs composants comme SiC-JFET, SiC diode Schottky et le SiC-MOSFET, de puissance commercialises de different constructeurs en raison d'elaborer un plan de choix guidant les concepteurs des circuits d'electronique de puissance de selectionner le composant le plus adapte a leur cahier de charge selon leurs objectifs et selon les performances de leurs convertisseurs de puissance.

Download or read book Conception suivi de fabrication et caract risation lectrique de composants haute tension en SiC written by Runhua Huang and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les composants actifs en électronique de puissance sont principalement à base de Silicium. Or, le silicium a des limites en termes de température d'utilisation, fréquence de commutation et de tenue en tension. Une alternative au Si peut être les semi-conducteurs à grand gap tels que le SiC-4H. Grâce aux travaux de plusieurs équipes de chercheurs dans le monde, les performances s'améliorent d'année en année. Le laboratoire AMPERE conçoit, réalise et caractérise des composants de puissance en SiC-4 H. Cette thèse s'inscrit dans les projets SiCHT2 et VHVD du laboratoire. Le travail réalisé au cours de cette thèse repose sur la conception la fabrication et la caractérisation électrique de composantes haute tension en SiC-4H. Les paramètres de protection pour la diode bipolaire 6500V sont optimisés à l'aide des simulations à base d'éléments finis. Les paramètres du SiC pour les modèles utilisés pour la simulation sont développés par des travaux précédents. Ensuite, le masque est dessiné. La diode est réalisée chez IBS. La première caractérisation est effectuée avant le recuit post-métallisation en directe et inverse sans passivation finale. Après le recuit post-métallisation la résistance de contact est plus faible. La caractérisation de la tenue en tension a été effectuée à AMPERE puis à l'ISL à très haute tension. A l'aide de simulations à base d'éléments finis, les paramètres tels que la résistance de contact et la durée de vie des porteurs ont été affinés à partir des caractérisations électriques obtenues par l'expérience. Les autres travaux portent sur la conception, les optimisations et les fabrications des diodes 10 kV et transistors 6500 V.

Download or read book Caract risation mod lisation et int gration de JFET de puissance en carbure de silicium dans des convertisseurs haute temp rature et haute tension written by Rami Mousa and published by . This book was released on 2009 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les systèmes d’électroniques de puissance ont grandement bénéficié du progrès révolutionnaire des composants de puissance en silicium (Si). Actuellement la quasi-totalité des applications d’électronique de puissance utilise des composants en Si. Les applications d’électroniques de puissance à haute température, haute tension et forte puissance sont de plus en plus croissantes et le silicium atteint ses limites. Le carbure de silicium (SiC) est un matériau semi-conducteur à large bande d’énergie interdite. Les propriétés électriques de ce matériau devancent celles du silicium, ce qui signifie qu’un composant en SiC présente de meilleures performances par rapport à son équivalent en silicium (Si). Les différents travaux à travers le monde démontrent un avenir prometteur pour le SiC dans la prochaine génération des composants de puissance. Le transistor JFET-SiC est l’interrupteur le plus avancé dans son développement technologique car il est au stade de la pré-commercialisation. Un modèle de type circuit pour les composants en SiC présente une extrême importance pour l’analyse et la conception de circuits de convertisseurs, en particulier, si une comparaison avec les composants en Si est établie. Le travail réalisé au cours de cette thèse, consiste à caractériser électriquement plusieurs versions de JFET-SiC pour des températures comprises entre 25°C et 225°C. Les caractérisations sont basées sur des mesures DC (Courant - Tension) en utilisant un traceur de caractéristiques, des mesures AC (Capacité - Tension) en utilisant un analyseur d’impédance et des mesures en commutation sur charge R-L (Résistive-Inductive). L’objectif est d’établir un modèle analytique du transistor JFET-SiCED. Ce modèle est basé sur l’analyse physique et comportementale du JFET en tenant compte de l’influence de la température et de la présence des deux canaux intrinsèques. Le modèle a été développé en langage VHDL-AMS et validé en régime statique ainsi qu’en dynamique en utilisant le simulateur SIMPLORER 7.0. La validation du modèle montre une excellente concordance entre les mesures et la simulation.

Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Download or read book X Ray and Neutron Reflectivity Principles and Applications written by Jean Daillant and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflection of and neutrons from surfaces has existed as an x-rays exp- imental for almost it is in the last technique fifty Nevertheless, only years. decade that these methods have become as of enormously popular probes This the surfaces and interfaces. to be due to of several appears convergence of intense different circumstances. These include the more n- availability be measured orders tron and sources that can over (so reflectivity x-ray many of and the much weaker surface diffuse can now also be magnitude scattering of thin films and studied in some the detail); growing importance multil- basic the realization of the ers in both and technology research; important which in the of surfaces and and role roughness plays properties interfaces; the of statistical models to characterize the of finally development topology its and its characterization from on roughness, dependence growth processes The of and to surface scattering experiments. ability x-rays neutro4s study four five orders of in scale of surfaces over to magnitude length regardless their and also their to ability probe environment, temperature, pressure, etc. , makes these the choice for buried interfaces often probes preferred obtaining information about the microstructure of often in statistical a global surfaces, the local This is manner to complementary imaging microscopy techniques, of such studies in the literature witnessed the veritable by explosion published the last few Thus these lectures will useful for over a resource years.

Download or read book Modern Power Devices written by B. Jayant Baliga and published by Wiley-Interscience. This book was released on 1987-03-10 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in a tutorial form, the text supplies in-depth the physics, design, and fabrication technology for power devices. Each chapter includes a discussion of the basic concepts of device operation and their electrical characteristics, a detailed analysis of the device physics, and the technology of fabrication. Extensive analytical solutions are used to enable the reader to obtain an understanding of the physics.

Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.

Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.

Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.

Download or read book Power Semiconductor Drives written by P V Rao and published by . This book was released on 2017-02 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power Semiconductor devices play a vital role in electrical power systems and are used widely in transmission, distribution and control of electric power. It deals with the fundamentals of machines, converters and control of machines with solid state devices. It is divided into eight chapters covering d.c. motor, single and three phases controlled rectifiers, d.c. motor driver by dual converter, four quadrant drive, d.c. choppers, induction motor with VSI, CSI and cycloconverters, control of induction motors and control of synchronous motors. Features * Each topic is explained lucidly so that the student can understand every aspect of the drive system easily. * Number of worked-out examples are given at the end of each chapter. * A number of quiz type questions are also given with answers after each chapter.

Download or read book Physical Properties of Amorphous Materials written by David Adler and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.

Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.

Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: