Dissertations / Theses on the topic 'Transistor VDMOS de puissance'
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Djellabi, Kamel. "Propriétés statiques et dynamiques du transistor VDMOS de puissance à miroir de courant." Toulouse 3, 1992. http://www.theses.fr/1992TOU30016.
Full textKassmi, Kamal. "Transistors VDMOS pour amplification de puissance en bande UHF." Toulouse 3, 1993. http://www.theses.fr/1993TOU30137.
Full textAlwan, Mohamad. "Contribution à l’étude de l’impact des dégradations d’origines électriques et thermiques sur les performances du transistor VDMOS de puissance." Rouen, 2007. http://www.theses.fr/2007ROUES027.
Full textThe power electronics modules are required to be strongly integrated and led to their capacity limits of operation. In addition, these modules are often subjected to several thermal environments which can deteriorate the semiconductors properties, and even to destroy them. The temperature can play an essential part in the degradation mechanisms. This work consists to take into account the degradation mechanisms in microelectronics components, like Power VDMOS, on their electric performances. A numerical analysis has been performed to evaluate the thermal stress effect on static and dynamic characteristics of VDMOS power FET’s. Under thermal stress conditions, some modifications of physical and electrical VDMOS properties are observed. We analyse, theoretically and numerically, parameters responsible of these modifications. Approximate expressions of the ionization coefficients and breakdown voltage in terms of temperature are proposed. Non-punch-throughjunction theory is used to express the breakdown voltage and the space charge extension with respect to the impurity concentration and the temperature. The capacitances of the device have been also studied. The effect of the stress on C-V characteristics is observed and analyzed. We notice that the drain-gate, drain-source and gate-source capacitances are shifted due to the degradation of device physical properties versus thermal stress. In a wide field of experimental conditions, we propose, by deepened physical analyses and 2D simulations (Silvaco), to highlight these phenomena of degradation being able to cause failures of the devices and microelectronics systems containing VDMOS. We have studied the effects of High Electric Field Stress (HEFS), thermal operating, Bias Temperature Instability (BTI) and Bias thermal cycling in threshold voltage and gate charge of n-channel Power VDMOSFETs. The gate charge characteristics and C-V capacitance have been investigated during stress. It is shown that the main degradation issues in the Si Power VDMOSFETs are the charge trapping and the trap creation at the interface of the gate dielectric induced by energetic free carriers which have sufficient energy to cross the SiO2/Si barrier
Morancho, Frédéric. "Le transistor MOS de puissance à tranchées : modélisation et limites de performances." Phd thesis, Université Paul Sabatier - Toulouse III, 1996. http://tel.archives-ouvertes.fr/tel-00165581.
Full textBeydoun, Bilal. "Simulation et conception des transistors M. O. S. De puissance." Toulouse 3, 1994. http://www.theses.fr/1994TOU30163.
Full textSphabmixay, Kim Huyen. "Etude de convertisseur à interrupteurs bidirectionnels bicommandables constitués de transistor vdmos à miroir de courant : Contribution à la reproduction de diode de synthèse par commande adaptée." Montpellier 2, 1994. http://www.theses.fr/1994MON20213.
Full textEl, Omari Hafsa Morel Hervé. "Extraction des paramètres des modèles du VDMOS à partir des caractéristiques en commutation comparaison avec les approches classiques /." Villeurbanne : Doc'INSA, 2005. http://docinsa.insa-lyon.fr/these/pont.php?id=el_omari.
Full textEl, Omari Hafsa. "Extraction des paramètres des modèles du VDMOS à partir des caractéristiques en commutation : comparaison avec les approches classiques." Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0040/these.pdf.
Full textThe study is about the analysis and the characterization of the VDMOS. First part of the text recalls the structure, the behavior and the modeling of the VDMOS. A semi-behavioral model, "2KP-model", has been selected. Experimental characterizations have been done in I-V, C-V and switching mode of operation. The role of pulse duration has been studied for quasi-static I-V characterization. Second part describes classical characterization and parameter extraction techniques applied to VDMOS models. Comparisons between simulations and measurements in switching mode operation in an R-L circuit are achieved. Third part corresponds to parameter extraction of the VDMOS model based on R-L switching measurements. Transient measured signals in such conditions yield sufficient information for the parameter extraction. An automatic identification procedure, based on optimization of the difference between measurements and simulation, has been applied. So comparison between PACTE simulations and experiments has been done. The obtained results show equivalence with respect to classical method. The interest of the proposed method is a drastic reduction of measurement noise
Martineau, Donatien. "Caractérisation de l'endommagement de composants électroniques de puissance soumis à des tests de vieillissement accéléré." Thesis, Toulouse, INSA, 2011. http://www.theses.fr/2011ISAT0004/document.
Full textIntegration of power electronic devices in automotive applications requires a perfect knowledge of their reliability as these components are subjected to more drastic electrothermal stresses. This study aims at determining the physical mechanisms responsible for degradation and failure of modern MOSFET-based power microprocessors during accelerated and controlled fatigue tests.After a description of the recent developments in power electronics that led to today's SmartMos technology from Freescale Semiconductor, the different microstructural characterizing techniques (SAM, SAT, SEM, SIM, TEM, …) and the specific scale for which they are used are detailed.The accelerated ageing of the components were carried out on a fatigue bench to evaluate the component lifetime according to parameters such as the temperature, current and pulse durations. A complete analysis of failed components showed that the area which is primarily affected by the electro-thermal cycling is the metal source that includes aluminum metallization and connection wires. In controlled ageing tests, we showed that the drain-source resistance (Rdson) increase was due to the metal source resistance augmentation. This phenomenon is linked to the degradation of the Aluminum layer that happens through grains division and crack propagation along the grain boundaries
Marcault, Emmanuel. "Contribution à l'intégration d'un indicateur de vieillissement lié à l'état mécanique de composants électroniques de puissance." Phd thesis, INSA de Toulouse, 2012. http://tel.archives-ouvertes.fr/tel-00728764.
Full textPrévost, Gwenae͏̈l. "Etude des corrélations entre les effets de la dose cumulée et du stress électrique sur les transistors VDMOS de puissance par une méthode originale de pompage de charge." Montpellier 2, 1997. http://www.theses.fr/1997MON20061.
Full textLuu, Aurore. "Méthodologie de prédiction des effets destructifs dus à l'environnement radiatif naturel sur les MOSFETs et IGBTs de puissance." Phd thesis, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00512340.
Full textDavies, J. T. "Two-dimensional numerical simulation of VDMOS transistors." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372695.
Full textTo, Duc Ngoc. "Circuit de pilotage intégré pour transistor de puissance." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENT017/document.
Full textThis thesis work focuses on the design, modelling and the implementation of integrated gate drivers for power transistors based on CMOS coreless transformer. The main objectives of thesis are the design, modeling and characterization of coreless transformer in two technologies CMOS 0.35 µm bulk and CMOS 0.18 µm SOI, as well as the design and the characterization of two integrated gate drivers in these two technologies. The results of thesis allow us to validate our proposal models for coreless transformer: 2D electrical model and 3D electromagnetic model. Moreover, one CMOS bulk isolated gate driver which monolithically integrates the coreless transformer, the secondary side control circuit for power transistors has been fabricated and validated for both high side and low side configuration in a Buck converter. Finally, a CMOS SOI isolated gate driver is designed; integrates in one single chip the external control, the coreless transformer and the close gate driver circuit for power transistors. This one-chip solution presents a numerous advantages in term of interconnect parasitic, energy consumption, silicon surface consumption, and EMI with a high level of galvanic isolation. The perspectives of this SOI gate driver are multiple, on the one hand, are the 3D assemblies between gate driver/power transistors and on the other hand, are the multiple-switch converter
MONCOQUT, DIANA. "Proprietes physiques et modelisation du transistor de puissance ldmos." Toulouse 3, 1997. http://www.theses.fr/1997TOU30299.
Full textBatut, Nathalie. "Transistor MOS de puissance à faible résistance à l'état passant." Toulouse 3, 2001. http://www.theses.fr/2001TOU30007.
Full textLi, Jian Ming. "Evaluation des possibilités fréquentielles des transistors bipolaires de puissance haute tension." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0049.
Full textLiu, Qiang. "Etude du comportement électrique de transistor de puissance pour l'automobile en haute température." Lyon, INSA, 1994. http://www.theses.fr/1994ISAL0125.
Full textThe knowledge of power semiconductor device electrical behaviour at about 200°C case temperature represents a great interest for future automotive electrical application. In this thesis, our work deals with two aspects : a study of functionality at high temperature for three types of power transistors (Darlington, MOSFET and IGBT) used by automobile (in particular for the application of transistorized injection and ignition) and a study of reliability for the "ignition" fonction at high temperature. The average junction temperature concerned by this study ranges from 30°C to 220°C. The study of functionality gives the electrical performance depending on junction temperature up to 220°C for different types of devices, Darlington, MOSFET and IGBTs, commercially available. The characteristics are affected by great changes in physical parameters of silicon with the increase in junction temperature. At off-state, the obvious increase in leakage current with ternperature is the same for the three devices. At on-state, their electrical behaviours are different for small votage bias and for current not greater than the nominal current. The measurement of drifts of electrical characteristics due to storage at high temperature, thermal cycle and thermal shock, can not demonstrate the systematic incompatibility between good functionalicy and presence of a 200°C ambient temperature. Finally, the study of the behaviour of Darlington, MOSFET and IGBT power devices, working in the ignition circuit, at 220°C of average junction temperature, has shown for each three technologies, that a characteristic may be critical for the reliability of the "ignition" function at high temperature
Tardivo, Gilles. "Le Transistor D. Mos vertical en amplification haute fréquence de puissance." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37610187r.
Full textTardivo, Gilles. "Le transistor d. Mos vertical en amplification haute frequence de puissance." Toulouse 3, 1987. http://www.theses.fr/1987TOU30001.
Full textLocatelli, Marie-Laure. "Etude du comportement électrique du transistor bipolaire de puissance en haute température." Lyon, INSA, 1993. http://www.theses.fr/1993ISAL0036.
Full textThe high temperature power device field concerns both the high ambient temperature applications an the systems opera ting at usual ambient temperature for which an increase in the power-to-weigh ratio is needed. In this frame, we particularly examined the electrical behaviour of the bipolar power transistor in the [30°C, 260°C] temperature range. We studied and analysed from a physical point view the on- and off-state characteristics, as also the switching characteristics under resistive and inductive load. An evaluation of the device dissipation versus junction temperature was made for each Phase of its switching operation Having left away all ageing and reliability problems, this study showed that the bipolar power transistor functionality is maintained in all the temperature range, though a perceptible performance diminution. The increase in power dissipation when the temperature is augmented leads to a limitation of the advantage of a high temperature operation of the component. Silicon, which is the sole semiconductor used for existing power devices, is personally involved especially because of its intrinsic carrier concentration and carrier mobility dependences on temperature. The analysis of the high temperature bipolar power transistor electrical characteristics, and the knowledge of the silicon carbide physical properties let us deduce the theoretical advantages of such a new semiconductor with regard to improvement of the bipolar power transistor performance at high temperature
Hamieh, Youness. "Caractérisation et modélisation du transistor JFET en SiC à haute température." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00665817.
Full textTheolier, Loïc. "Conception de transistor MOS haute tension (1200 volts) pour l'électronique de puissance." Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00377784.
Full textPittet, Serge. "Modélisation physique d'un transistor de puissance IGBT : traînée en tension à l'enclenchement /." [S.l.] : [s.n.], 2005. http://library.epfl.ch/theses/?nr=3215.
Full textLagarde, Cyril. "Modélisation de transistor de puissance en technologie GaN : conception d’un amplificateur de type Doherty pour les émetteurs à puissance adaptative." Limoges, 2006. https://aurore.unilim.fr/theses/nxfile/default/36416d31-0431-481e-84ec-ad7070a42012/blobholder:0/2006LIMO0038.pdf.
Full textNew power transistors technologies based on “wide bandgap” materials such as Gallium Nitride (GaN) were developed these last years. This new technology presents interesting capabilities for high power microwave amplifiers in terms of high working temperature, high power densities and high breakdown voltages. This work concerns first the development of a new tabular electrothermal non linear model including trapping effects on an AlGaN/GaN power HEMT. This model has then been used, in the second part of this thesis, to design a power amplifier based on the Doherty principle. In satellite communication systems, a good linearity and a high efficiency are drastic constraints on the power amplifier. In order to deal with these constraints, we have proposed and designed a new Doherty amplifier with a symmetrical architecture based on three GaN HEMT devices. Experimental results have shown the interesting capabilities of this new Doherty structure in terms of efficiency and linearity under output power back-off operation
Debrie, Jean-Luc. "Modèle "distribué" de transistor IGBT pour simulation de circuits en électronique de puissance." Toulouse, INSA, 1996. http://www.theses.fr/1996ISAT0046.
Full textMAUREL, THIERRY. "Modele electrothermique unidimensionnel du transistor bipolaire de puissance pour la simulation de circuits." Paris 11, 1995. http://www.theses.fr/1995PA112476.
Full textNapieralska, Malgorzata. "Modélisation du transistor V. DMOS pour simulation de circuits en électronique de puissance." Toulouse, INSA, 1991. http://www.theses.fr/1991ISAT0009.
Full textHelali, Hichem. "Contribution à la modélisation par graphe de liens du transistor MOS de puissance." Lyon, INSA, 1995. http://www.theses.fr/1995ISAL0038.
Full textThe models of semiconductor devices developed for micro-electronic purpose, are not satisfying in the power electronic field. CEGELY has developed the simulator software PACTE that is based on bond graph technique. Also it has been developed the hardware description language M++. The present work firstly covers the transcription of the main SPICE - oriented models using the M++ language, in order to ease the simulation of the drivers of the power semiconductor devices. It has been derived a new mode! of the power MOS transistor. Particularly the latter modeling uses the basic semiconductor regions approach. A new mode! of the channel (one basic semiconductor region) is discussed. This channel mode! is well adapted to the power MOS transistor model has it takes. . . _ into account a non uniform doping level and the transverse unbalance of electrons in the channel. Ail the physical analysis that this modeling work is based on, rely on a systematic comparison of the analytical mode! of a pilot power MOS transistor with the device simulator MEDICI. The simulation results obtained with the latter mode! show an important improvement regarding the classical models. The results have been compared to measurements and simulation results with MEDICI, particularly in the steady state operation of the power MOS transistor
Benchaib, Khadidja. "Modèle facile d'emploi de transistor bipolaire pour la CAO en électronique de puissance." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT007H.
Full textMasante, Cédric. "Transistors MOS en diamant pour l'électronique de puissance." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT070.
Full textIn the context of a growing need for power semiconductor devices, as more and more applications from motor drives to power grids requires DC/AC, AC-DC or DC-DC converters with higher efficiencies and higher power densities, the research on new solutions is essential. Wide band gap materials have already shown their superior physical properties for this kind of applications, due to their ability to sustain larger current power densities and voltages compared to silicon based devices. Amongst them, diamond is an ultra-wide band gap material (5.5 eV) with one of the highest critical electric field capability , which coupled with its great thermal conductivity (22 W/cm.K) and hole mobility (2000 cm²/V.s) makes it a particularly interesting semiconductor for power electronics. Despite the challenging fabrication of diamond based devices due to the small standard substrate size (a few mm²), diamond is still being actively studied with constant progresses.This thesis is focused on the design , fabrication and characterization of diamond Metal-Oxide-Semiconductor Field Effect Transistors (MOSFETs) which takes advantage of the wide band gap of diamond to design an original device architecture based on a stable deep depletion regime. The design optimization of such devices will be established according to the state of the art physical models, then experimental test devices will be analysed to better understand the physics of the diamond MOSFET. Finally, a performance evaluation in comparison to other semiconductors and existing diamond devices will be presented. Several perspectives from these performances as well as from original architectures specific to diamond will be drawn
Reynes, Jean-Michel. "Relations entre performances et parametres structuraux des transistors bipolaires de puissance : application a la conception des composants." Toulouse, INSA, 1986. http://www.theses.fr/1986ISAT0028.
Full textZITOUNI, MOANISS. "Une nouvelle structure d'interrupteurs pour circuits integres de puissance : le concept du transistor ludmos." Toulouse 3, 1999. http://www.theses.fr/1999TOU30178.
Full textMuller, Dorothée. "Optimisation des potentialités d’un transistor LDMOS pour l’intégration d’amplificateur de puissance RF sur silicium." Limoges, 2006. https://aurore.unilim.fr/theses/nxfile/default/8c93dadd-0847-4920-96c8-e1f79fc507d7/blobholder:0/2006LIMO0041.pdf.
Full textThe RF power amplifiers realized from components stemming from III-V technologies are at present the most successful because of their intrinsic physics properties. Nevertheless these technologies do not completely answer the requirements of the radiotelephony mobile market in term of cost of returns. New generations of MOS power transistors on silicon such as the LDMOS appeared to answer this need. These power devices have the advantage to be realized in mature technologies and offer very honourable performances to much lower costs, what is a major trump card in the current context where the cellular telephone market is very sensitive to the price of components. This thesis deals with a reflection on the potentialities of a transistor LDMOS integrated into a 0. 25 µm BiCMOS technology and on the optimization of its performances for RF power amplifiers circuits integrated on silicon. Firstly, the LDMOS transistor physical mechanisms and also the main reasons that make the LDMOS transistor a better candidate than the MOSFET for radio frequencies applications are presented. The work described afterward articulates around the realization and the optimisation of the LDMOS transistor for RF power applications. In fact, the technological parameters are determined in order to get a device, which output characteristics match the ones fixed by the application. Then an analysis is made to identify the device intrinsic and extrinsic parameters, which are susceptible to improve its dynamic performances. For it the effect of the modifications of architecture, layout as well as the manufacturing process on the dynamic characteristics were studied and ended in promising results. Indeed the performances of the optimized transistor LDMOS reach the state of the art
Gillet, Pierre. "Modèle "distribué" de transistor bipolaire pour la C. A. O. Des circuits en électronique de puissance." Toulouse, INPT, 1995. http://www.theses.fr/1995INPT003H.
Full textLallement, Christophe. "Modèle analytique à une dimension du transistor MOSFET de puissance prenant en compte les interactions thermoélectriques /." Paris : École nationale supérieure des Télécommunications, 1994. http://catalogue.bnf.fr/ark:/12148/cb35706674x.
Full textDia, Hussein. "Contribution à la modélisation électrothermique: Elaboration d'un modèle électrique thermosensible du transistor MOSFET de puissance." Phd thesis, INSA de Toulouse, 2011. http://tel.archives-ouvertes.fr/tel-00624193.
Full textAllard, Bruno. "Graphe de liens du transistor bipolaire de puissance en vue de la simulation de circuits." Lyon, INSA, 1992. http://www.theses.fr/1992ISAL0009.
Full textPower Electronic CAD needs that circuit simulation predicts accurately thermal and electrical constraints encountered by power devices during switching transients. Today, the most frequently used models (SPICE and Gummel-Poon ones) produce insufficient results in the conditions of such simulation. This is due to an empirical representation of phenomena occurring in saturation regime. Saturation is characterized principally by a high level injection neutral region in the low-doped collector. Accurate modelling of this mechanism is treated in present dissertation, and particularly used technicals of Functional Analysis (Internal Approximation) and technics of System Theory (state variable modelling, bond graphs). The mode! derived appears as a bond graph which fits exactly the geometrical structure of the device, and that follows clearly physic mechanisms. Moreover, at the opposite of Gummel-Poon model, parameters are very few, really important and concern only the technological structure of the transistor (doping profile, lifetimes,. . . ) Finally, simulation results are very closed to experimental measurements, much better than those produced with SPICE for the restricted case of hard switching, with equivalent amount of computer time
Naimi, Abassia. "Contribution à la modélisation du transistor bipolaire de puissance et implantation dans le simulateur PSpice." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT138H.
Full textSchanen, Jean-Luc. "Intégration de la compatibilité électromagnetique dans la conception de convertisseurs statiques en électronique de puissance." Grenoble INPG, 1994. https://hal.archives-ouvertes.fr/tel-01907791.
Full textWeber, Yann. "Conception d'une nouvelle génération de transistor FLYMOS vertical de puissance dépassant la limite conventionnelle du silicium." Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00807836.
Full textAllain, Dominique. "Bibliothèque de modèles du transistor V. DMOS pour la simulation des circuits de l'électronique de puissance." Toulon, 1989. http://www.theses.fr/1989TOUL0005.
Full textAl, Alam Elias. "Développement de briques technologiques pour la réalisation de transistor MOS de puissance en Nitrure de Gallium." Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1476/.
Full textGallium Nitride (GaN) semiconductor is one of the most promising materials for new power devices generation thanks to its outstanding material properties for high voltage, temperature and frequency applications. The higher and higher efficiency demanded in future switch power applications requires the investment on normally-off transistors in GaN substrates. Hence, the main objective of this thesis was the development and optimization of a technological process with the purpose of fabricating a GaN power MOS transistor. Then, a first definition of the normally-off GaN power transistor design has been carried out after an extended evaluation of the state-of-the-art. The gate dielectric deposition technological step which gives the quality of the dielectric/GaN interface is the cornerstone of a high performance GaN power transistor. This important step includes the GaN surface preparation, the formation of an interface layer and the subsequent deposition of the dielectric. We have observed that an UV-oxidation step combined with plasma oxidation before the dielectric deposition highly improves the GaN surface quality and minimizes the concentration of contaminants in the dielectric/GaN interface. Besides, measurements performed in fabricated MOS structures to determine the interface trap density of the obtained dielectric/GaN have shown significant differences related to the epitaxial growth type (MBE or MOCVD), especially to the type (N or P) and doping concentration of the GaN substrate. Correlations between the physical-chemistry of the interface and the electrical properties of MOS structures are also investigated in this work. In addition, other necessary technological steps for the fabrication of a GaN MOSFET have been analysed, especially those concerning the N and P type ionic implantation and the reactive-ion etching. All the results presented in this work will allow, in the near future, the design of high quality normally-off power MOS transistors in GaN substrate. However, there are still have scientific and technological challenges to overcome before obtaining the high efficiency power switch demanded in future switch applications
Dong, Quan. "HEMTs cryogéniques à faible puissance dissipée et à bas bruit." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112035.
Full textTransistors with low noise level at low frequency, low-power dissipation and operating at low temperature (≤ 4.2 K) are currently non-existent, however, they are widely required for realizing cryogenic preamplifiers which can be installed close to sensors or devices at a temperature of few tens of mK, in astrophysics, mesoscopic physics and space electronics. Research conducted over many years at LPN aims to a new generation of high-performance cryogenic HEMTs (High Electron Mobility Transistors) to meet these needs. This thesis, through the collaboration between the CNRS/LPN and the CEA/IRFU, aims for the realization of cryogenic preamplifiers for microcalorimeters at 50 mK.The work of this thesis consists of systematic characterizations of electrical and noise parameters of the HEMTs (fabricated at LPN) at low temperatures. Based on the experimental results, one of the low-frequency-noise sources in the HEMTs has been identified, i.e., the sequential tunneling part in the gate leakage current. Thanks to this result, heterostructures have been optimized to minimize the gate leakage current and the low frequency noise. During this thesis, specific methods have been developed to measure very low-gate-leakage-current values, transistor’s capacitances and the 1/f noise with a very high input impedance. Two experimental relationships have been observed, one for the 1/f noise and other for the white noise in these HEMTs at 4.2 K. Significant advances have been made, for information, the HEMTs with a gate capacitance of 92 pF and a consumption of 100 µW can reach a noise voltage of 6.3 nV/√ Hz at 1 Hz, a white noise voltage of 0.2 nV/√ Hz, and a noise current of 50 aA/√Hz at 10 Hz. Finally, a series of 400 HEMTs has been realized which fully meet the specifications required for realizing preamplifiers at CEA/IRFU. The results of this thesis will provide a solid base for a better understanding of 1/f noise and white noise in cryogenic HEMTs with the objective to improve them for various considered applications
Rennesson, Stéphanie. "Développement de nouvelles hétérostructures HEMTs à base de nitrure de gallium pour des applications de puissance en gamme d'ondes millimétriques." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00943619.
Full textDia, Hussein. "Contribution à la modélisation électrothermique : Elaboration d'un modèle électrique thermosensible des composants MOS de puissance." Thesis, Toulouse, INSA, 2011. http://www.theses.fr/2011ISAT0006/document.
Full textStrong demand for robustness has emerged in all areas of application of power components.Only a detailed analysis of phenomena related directly or indirectly to failures can ensure thereliability of the functions of the new power components. However, these phenomena involvethe coupling between electrical effects, thermal and mechanical, making their study verycomplex. The use of multi-physics modeling is well suited when determining. In this thesis,we propose a methodology for electrical modeling taking into account the effects of temperatureon the localized phenomena that initiate failure is often fatal. In preparation for thecoupled electro-thermal simulation involving MOS power transistors, an electric thermosensitivemodel of the MOS and its body diode has been developed. Correspondingly a set ofexperimental studies was implemented to extract the parameters and model validation. Particularattention was paid to the study of interference phenomena that could occur in a localizedresponse to an inhomogeneous distribution of temperature and hot spots. Thus the workingslimits avalanche, with the outbreak of parasitic bipolar transistor (snapback) and its reversalwere modeled. Benches specific validations of the model for harsh switching conditions wereused by taking precautions related to high temperature. Finally, the complete thermal electricmodel developed was used by the company “EPSILON Ingénierie” for electro-thermal simulationof power MOS mode Avalanche Software adapting Epsilon-R3D
Ammous, Anis. "Modélisation électrothermique de l'I. G. B. T. (Transistor bipolaire à grille isolée) : application à la simulation du court-circuit." Lyon, INSA, 1998. http://www.theses.fr/1998ISAL0075.
Full textIGBTs (Insulated Gate Bipolar Transistor) are power components more and more used today. One of the component characteristic, making it very attractive to users, is it's short-circuit capability. The proposed study treats the feasibility of modeling and simulation of IGBT destruction phase. We have shown that it is possible to predict the failure of IGBT submitted to strong and accidentai stress in electrical systems. The study of destruction modes are begins with experimental observations of operating and failure phases (destructive tests), for IGBTs under short-circuits induced by various perturbations. Some thermal models are analysed and their respective precision regarding short time overloads, are studied. It is discussed the advantage of finite element method compared to the difference element method which is largely used in thermal model inside circuit simulators. A new method to estimate maximal temperature in IGBTs by mean of experiments is presented. This method is based on saturation current measurements at law gate-to-source voltage during a cooling phase. Electrothermal simulations enable to study the IGBT critical behaviour. Many modeling and simulation tools (ATLAS 20, PACTE, SABER) are applied to model the IGBT critical behaviour. The electrical modeling of IGBTs is based on the analytical mode! by A. Hefner. Measurement and simulation results enable to predict the model parameters and they validate the developed models
Pham, Thanh-Toan. "Mastering the O-diamond/Al2O3 interface for unipolar boron doped diamond field effect transistor." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT051/document.
Full textNowadays, global warming effect is one of most challenging issue for human being. Most of “traditional energy” sources like thermal power; nuclear power, hydroelectricity power, etc. are dangerous and/or potentially dangerous for nature and human being. Therefore, the "greener energy" is highly desired. The "greener energy" has two folds meaning: on one hand, using renewable energy sources like solar power, wind power or geothermal energy, etc. instead of the traditional energy sources. One another hand, use the electricity more effectively and more efficiency. A recent report has pointed out that the energy loss in US is in fact more than sum of all renewable energy generate in US. Therefore, effectively utilizing electricity and limiting the waste is critical.Unfortunately, losses are the endemic of semiconductor components, the central device of all power conversion system. Silicon (Si), the main material for semiconductor components has reached its physical limit. Wide band-gap semiconductors such as SiC, GaN, Ga2O3 and diamond are promising materials to fabricate the devices low ON-state loss and high OFF-state breakdown voltage. Among them, diamond is an ideal semiconductor for power devices due to its superior physical properties. Recent progresses on diamond technology permits one consider the diamond power devices, e.g. MOSFET.In order to realize a diamond MOSFET by controlled diamond semiconductor, the numbers of issues needed to be overcome is important, especially mastering the diamond/oxide interface. In this context, G. Chicot and A. Marechal (former PhD students in our group) has introduced the O-diamond/Al2O3 MOSCAP test devices and measured the type I band alignment at O-diamond/Al2O3 interface, which is favorable to realize both inversion MOSFET and depletion MOSFET in his PhD these. This PhD project is a continuation of two-mentioned thesis and including two main objects: 1. Fundamental investigations dedicate to understand the electrical characteristic of an O-diamond MOSCAP test device; 2. Realize a unipolar diamond MOSFET by controlling the diamond semiconductor epilayer. The thesis will include three chapters:Chapter 1 discusses the context of power devices as well as the physical properties of diamond and state-of-the-art of diamond devices. We also introduce the working principle of an ideal MOSCAP test device and States-of-the-art of O-diamond MOSCAP test devices.Chapter 2 dedicates for the fundamental understanding O-diamond MOSCAP and include three main parts: Part 1 addresses the methodology issues related to diamond growth, fabrication processing and electrical characterizations. We will construct an empirical electrostatics model for O-diamond MOSCAP. Part 2 discusses the origin of leakage current and capacitance-frequency dependent when O-diamond MOSCAP is biasing in negative direction. We quantify the interface states density at O-diamond/Al2O3 interface by conductance method and the complete electrostatics model for O-diamond/Al2O3 MOSCAP will be constructed. Part 3 discusses the origin of leakage current and the capacitance-frequency dependent when the O-diamond MOS capacitor is biasing in positive direction.Chapter 3 introduces our approach to realize a depletion mode diamond MOSFET. Transistor performance and the important parameters of the transistor will be quantified. The benchmark of the device and the projection towards its improvement will be mentioned
Andrieux, Laurent. "Caractérisation du transistor bipolaire à hétérojonction GaAlAs/GaAs en vue de son utilisation en amplification hyperfréquence de puissance." Toulouse 3, 1995. http://www.theses.fr/1995TOU30134.
Full textAmimi, Adel. "Modèle électro-thermique unidimensionnel du transistor bipolaire à grille isolée (IGBT) pour la simulation de circuits de puissance." Rouen, 1997. http://www.theses.fr/1997ROUES033.
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