Дисертації з теми "Transistor à haute mobilité électrique"
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Duszynski, Isabelle. "Réalisation et caractérisation électrique de transistors HEMTs AlInAs/GaInAs de longueur de grille sub-50 nanomètres et de transistors sans couche tampon." Lille 1, 2005. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2005/50376-2005-346.pdf.
Повний текст джерелаAinsi, en augmentant ce rapport à 1,5 (cas des transistors sur barrière fine), on obtient une fréquence ft de 253GHz et une fréquence fmax de 380GHz. La dernière structure, à barrière fine et mixte, nous a permis d'obtenir des fréquences ft de l'ordre de 270GHz rien qu'en augmentant légèrement l'épaisseur de la barrière (puisque la grille a été déposée sur la Couche d'InP). Ces premiers résultats indiquent les potentialités offertes par l'utilisation d'une barrière Schottky mixte. Ces résultats pourraient être améliorés par l'utilisation d'un "double recess", ce qui permettrait de diminuer les zones trop importantes d'extensions de recess, à l'origine de la dégradation des performances fréquentielles de ces composants ultimes. L'amélioration de certains paramètres électriques liée à l'utilisation d'un recess mieux adapté permettrait d'aboutir à une fréquence ft de 520GHz, proche de l'état de l'art. Néanmoins, la réduction des dimensions atteint des limites, c'est pourquoi nous avons envisagé d'étudier des composants en rupture technologique avec les précédents transistors appelés "transistors sans couche tampon". L'idée est de venir supprimer la couche tampon qui est à l'origine d'une augmentation de la conductance de sortie par l'injection de porteurs dans cette couche. La réalisation technologique de ces composants est basée sur la technique de report de substrat, qui a été mise au point et adaptée à la réalisation d'un HEMT sans couche tampon. Les premiers résultats électriques indiquent que la technique de report de substrat affecte peu les caractéristiques de la couche active. Bien que nous ayons réalisé les premiers transistors sans couche tampon de longueur de grille 100nm, les caractéristiques électriques observées ne sont pas celles escomptées. Toutefois l'origine de ces faibles performances a été identifïée, et des solutions d'amélioration sont proposées
El, Makoudi Ikram. "Étude et fabrication de transistors à enrichissement de la filière InAlAs/InGaAs pour applications millimétriques faible bruit." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10069/document.
Повний текст джерелаThe increasing needs of high frequency electronic systems combined with constant efforts in miniaturization require low noise and high frequency Field Effect Transistor with high operation voltage. For digital applications, enhancement mode HEMT is needed. The enhancement-mode metamorphic AlInAs/GaInAs HEMT on GaAs substrate developed in OMMIC in 2007 meet these requirements and it represents the starting point of our study. The aim of our work is to provide AlInAs/InGaAs E-HEMTs for low noise applications, on InP substrate in order to take advantage of its high electronic mobility, while maintaining high static and dynamic performances. We first optimized the structure, then we realized and characterized E-HEMTs which reach high cutoff frequencies, such as 204 GHz for FT and 327 GHz for FMAX, combined with a low noise figure of 0.96 dB and an associated gain of 13.2 dB at 30 GHz. These structures also show high static performances such as a 30 mV threshold voltage, a gate-to-drain breakdown voltage of –7 V, and a high transconductance of 1040 mS/mm. These results make this pseudomorphic E-HEMT on InP substrate at the state of the art of the enhancement mode HEMTs, and it even competes with the best low noise applications depletion mode HEMTs
Rennane, Abdelali. "Caractérisation et modélisation du bruit basse fréquence des composants bipolaires et à effet de champ pour applications micro-ondes." Toulouse 3, 2004. http://www.theses.fr/2004TOU30236.
Повний текст джерелаThis thesis deals mainly with electrical noise in microwave silicon germanium (SiGe) and gallium nitride (GaN) field effect transistors (HEMT’s) and SiGe heterojunction bipolar transistors (HBT’s). The organisation of this memory is as follows, in first chapter, we remember the important properties of excess noise sources encountered in these type devices. In addition, we describe the measurement set-ups used for static and noise characterization. In the second and third chapters, a thoroughful analysis of the noise dependence on frequency, bias, and geometry of both SiGe and GaN HEMT’s, has been carried out, specifically, the input and output current noise sources respectively iG and iD and their correlation. This in combination with static characterization, allowed to identify the different noise sources present in these devices and their supposed origin. .
Locatelli, Marie-Laure. "Etude du comportement électrique du transistor bipolaire de puissance en haute température." Lyon, INSA, 1993. http://www.theses.fr/1993ISAL0036.
Повний текст джерелаThe 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
Liu, Qiang. "Etude du comportement électrique de transistor de puissance pour l'automobile en haute température." Lyon, INSA, 1994. http://www.theses.fr/1994ISAL0125.
Повний текст джерелаThe 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
Chikhaoui, Walf. "Etude des mécanismes physiques responsables des dysfonctionnements des transistors HEMTs à base d'hétérostructures AlGaN/GaN et AlInN/GaN." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00679527.
Повний текст джерелаJuery, Lucie. "Communication térahertz sans fil à haut débit avec un transistor à haute mobilité électronique comme détecteur." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20115/document.
Повний текст джерелаOne of the major objectives of communication systems is the ability to transmit data at the highest possible rates. The ever-growing user demand for wireless communication already exceeds capacities of present networks.In order to solve this problem, we introduce communication systems based on terahertz (THz) high-frequency carriers, whose frequencies are high enough to support data-rates higher than a hundred of gigahertz. In particular, we are interested in the development and the integration of a high data-rate detector intended for THz wireless communication.We use a GaAs High-electron-mobility transistor (HEMT) as detector. Unlike existing detectors such as Schottky diodes, the transistor studied in this thesis offers advantages in terms of cost, compactness and performances. In particular, the output impedance is more suitable for high data-rate integrated circuits whose input impedance is 50 Ohm. We present the characterization of the detector in terms of sensitivity and modulation bandwidth, demonstrating for the first time its ability to be used for high data-rate communications. The transistor's integration, essential for real communications, is detailed.A wireless THz communication is demonstrated around 0.200 THz and 0.309 THz. For the first time, an error-free transmission at data-rates up to 8.2 Gbps is demonstrated, using a GaAs plasma wave HEMT and a 0.309 THz carrier frequency. Finally, we present new transistors with integrated antenna, allowing communications at higher data-rates and with a longer range, thanks to a better sensitivity
Aupetit-Berthelemot, Christelle. "Etude des effets parasites du transistor à haute mobilité électronique (HEMT) sur InP pour applications micro-optoélectroniques." Limoges, 1998. http://www.theses.fr/1998LIMO0042.
Повний текст джерелаWerquin, Matthieu. "Études théoriques et expérimentales de transistors HEMT's de la filière nitrure de gallium pour les applications de puissance hyperfréquences." Lille 1, 2005. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2005/50376-2005-274.pdf.
Повний текст джерелаAubry, Raphaël. "Étude des aspects électrothermiques de la filière HEMT AlGaN/GaN pour application de puissance hyperfréquence." Lille 1, 2004. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/6d4720ee-b249-4e1e-8872-4fa2c68170bf.
Повний текст джерелаOuro, Bodi Dissadama. "Etude des effets parasites du transistor à haute mobilité électronique : corrélation avec les aspects technologiques et la fiabilité." Bordeaux 1, 1992. http://www.theses.fr/1992BOR10643.
Повний текст джерелаBelhadj, Abdenabi. "Etude des effets parasites et des mécanismes de dégradation du transistor à effet de champ à haute mobilité électronique." Limoges, 1990. http://www.theses.fr/1990LIMO0092.
Повний текст джерелаLamrani, Younès. "Contribution à l'étude expérimentale et à la simulation de la diffusion anormale du bore dans le silicium." Toulouse 3, 2005. http://www.theses.fr/2005TOU30042.
Повний текст джерелаHamieh, 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.
Повний текст джерелаCutivet, Adrien. "Caractérisation et modélisation de dispositifs GaN pour la conception de circuits de puissance hyperfréquence." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10194/document.
Повний текст джерелаAmongst the emerging and developing technologies of the 21st century, wireless transmission is a fundamental aspect for mobile networks, aeronautics, spatial applications and global positioning systems. In that sense, the use of higher frequency bandwidths and increase of transmission channels are aimed by various current research works. Investigated technologies are based upon integrated systems to meet the criteria of devices costs and size. As the cornerstone of such devices, the transistor largely accounts for the final system performance in terms of working frequency, reliability and consumption. To respond to the challenges of today and tomorrow challenges, alternatives to the dominant current silicon process are clearly considered. To date, gallium nitride based technology is found to be the most promising for hyperfrequency power amplification for Ka and W bands given the associated physical and electrical characteristics, prototypes performance and first commercial “off-the-shelf” products. Exploitation of this technology to its full potential requires controlling and mastering the involved fabrication, characterization and modeling steps related to the transistor. This work aims at establishing a methodology enabling a semi-physical modeling of experimental transistors which exhibit state-of-the-art performance. A significant part of this work will also focus on thermal characterization of devices under test and on modeling of passive elements suited for the design of hyperfrequency power circuits
Le, Coustre Gwenael. "Contribution au développement d’une filière de transistor de forte puissance à base de technologie HEMT GaN pour applications télécoms et radar." Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10118/document.
Повний текст джерелаThe use of wide-gap materials is a solution for the generation of power at microwaves frequencies, and HEMTs processed on Gallium Nitride currently present the best world performances in this domain. However, the designers need to know their electrical limitations. More precisely, they need to know their electric characteristics in their areas of operation, and also to have at their disposal mathematical model for CAD tools. In a first part, electrical characterizations were carried out in order to determine the impact of the physical limitations on the generation of power: breakdown voltage, gate-lag and drain-lag related trapping effects, thermal resistance of interface in the epitaxy…In the second part of this thesis, the design and the realization of first demonstrators were carried out in band S (3 GHz). These demonstrators allow a first characterization of the power devices with several millimeters of gate development processed in the laboratory. These characterizations are not to be done on wafer, for thermal reasons as well as electrical connections issues. They allow determining the optimum impedances for power and/or PAE very close to the DUT terminals, i.e. with a good precision. These impedances will be used for the design of the amplifiers, presented in the first part. First, an analysis of the impact of the input and output loads on the reachable bandwidth has been done. Secondly, a presentation of the design and the characterization of 25W and 100W class HPA is presented. The measurements of these latter amplifiers have shown output power higher than 120W, with a power added efficiency and an associated power gain respectively of 40% and 22 dB. These results, in terms of power, PAE and temperature, make us very confident for the future design of GaN HEMTs based amplifiers in S-band for radar applications
Belache, Areski. "Etude des propriétés physiques et performances potentielles en basses températures du transistor à effet de champ à haute mobilité électronique AlGaAs/GaAs." Lille 1, 1989. http://www.theses.fr/1989LIL10037.
Повний текст джерелаJoblot, Sylvain, and S. Joblot. "Croissance d'hétérostructures à base de GaN sur substrat de silicium orienté (001): applications aux transistors à haute mobilité d'électrons." Phd thesis, Université de Nice Sophia-Antipolis, 2007. http://tel.archives-ouvertes.fr/tel-00396384.
Повний текст джерелаMedjdoub-El, Amraoui Mokhtaria. "Dépôts de nitrure de silicium assistés par plasma à couplage inductif ICP-PECVD : application à la passivation du transistor à haute mobilité électronique GaInAs/InP." Paris 7, 2001. http://www.theses.fr/2001PA077100.
Повний текст джерелаHerbecq, Nicolas. "Conception et réalisation de composants GaN innovants pour les applications de conversion de puissance au-delà du kilovolt." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10152.
Повний текст джерелаGaN-based High Electron Mobility Transistors (HEMTs) on Silicon substrate (GaN-on-Si) are promising candidates for future generations of power converters. Today, technical limitations need to be overcome in order to allow the industrial commercialization of this technology, particularly for high-voltage applications (≥ 600 V). In this frame, this work constitutes a contribution to the development of innovative GaN-on-Si devices operating above 1kV. We mainly focused on the improvement of the blocking voltage of the transistors with the realization of a local substrate removal process with the aim of suppressing the parasitic conduction phenomena between the buffer layer and the substrate. Owing to an improved technological process and innovative epitaxial structures, we observed a drastic improvement of the electrical performances of the transistor under high voltages. In particular, we have been able to demonstrate for the first time a blocking voltage above 3kV for this emerging technology. These results, well beyond the state of the art, pave the way for higher voltage operation GaN-on-Si power devices
Sarazin, Nicolas. "HEMTs à base de nitrure de gallium : évolution vers un nouveau système de matériaux, une nouvelle génération de composants." Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-Sarazin.pdf.
Повний текст джерелаBaron, Nicolas. "Optimisation de l'épitaxie sous jets moléculaires d'hétérostructures à base de GaN : application aux transistors à haute mobilité d'électrons sur substrat silicium." Phd thesis, Université de Nice Sophia-Antipolis, 2009. http://tel.archives-ouvertes.fr/tel-00451937.
Повний текст джерелаTaurou, Eléonore. "Utilisation des transistors GaN dans les chargeurs de véhicule électrique." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC076/document.
Повний текст джерелаImprovement of power density is a bigchallenge for embedded electric vehicle chargers.Goal of the study is to reduce the volume of the DCDCcharger which contains a bulky transformer. Thekey point is to use wide band gap transistors (GaN) toincrease the charger switching frequency. High switchingfrequency can improve power density but theinconvenient is the increase of switching and transformerlosses. The PhD dissertation is organized inthree steps. First step is the definition of a charger topology.This topology is optimized to reduce transformerlosses. Second part of the study is the theoreticaldesign of a high power density transformer. A completetransformer parametric model is presented withFinite Element Analysis. Third part present the prototypeand test results of the charger DC-DC. Electricalbehavior, volume and efficiency results are discussedin this part.Universit ´
Lucas, Tristan. "Vers la cryoélectronique ultra sensible : étude expérimentale des caractéristiques statiques et du bruit en 1/f du HEMT à 4,2K." Paris 7, 2003. http://www.theses.fr/2003PA077246.
Повний текст джерелаBenbakhti, Brahim. "Analyses physique et thermique de transistors à effet de champ de la filière GaN : optimisation de structures pour l'amplification de puisssance hyperfréquence." Lille 1, 2006. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2006/50376_2006_294.pdf.
Повний текст джерелаRennesson, 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.
Повний текст джерелаNiu, Shiqin. "Conception, optimisation et caractérisation d’un transistor à effet de champ haute tension en Carbure de Silicium." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI136/document.
Повний текст джерелаSilicon carbide (SiC) has higher critical electric field for breakdown and lower intrinsic carrier concentration than silicon, which are very attractive for high power and high temperature power electric applications. In this thesis, a new 3.3kV/20A SiC-4H JFET is designed and fabricated for motor drive (330kW). This breakdown voltage is beyond the state of art of the commercial unipolar SiC devices. The first characterization shows that the breakdown voltage is lower (2.5kV) than its theoretical value. Also the on-state resistance is more important than expected. By means of finite element simulation the origins of the failure are identified and then verified by optical analysis. Hence, a new layout is designed followed by a new generation of SiC-4H JFET is fabricated. Test results show the 3.3kV JFET is developed successfully. Meanwhile, the electro-thermal mechanism in the SiC JFETs under short circuit is studied by means of TCAD simulation. The commercial 1200V SIT (USCi) and LV-JFET (Infineon) are used as sample. A hotspot inside the structures is observed. And the impact the bulk thickness and the canal doping on the short circuit capability of the devices are shown. The physical models validated by this study will be used on our 3.3kV once it is packaged
Boucherit, Mohamed. "Etude et réalisation de dispositifs hyperfréquences sur matériaux grand gap : diode à effet tunnel résonant AlxGa1-xN/GaN, transistor HEMT boré à base de nitrure de gallium." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10004/document.
Повний текст джерелаThe work described in this thesis contributes to the improvement on some circuit based on wide band gap semiconductors. The first concerns the oscillators and the second RF amplifiers at microwave frequencies. Components selected to build these two devices are resonant tunneling diodes and high electron mobility transistors. This thesis is divided into two distinct parts:-The resonant tunneling diodes AlGaN/GaN: a software that provides a rigorous description of vertical transport in nitride heterostructures does not exist or are not available in Europe. In this thesis, we developed a model based on the self-consistent resolution of the Schrödinger and Poisson equation using the non-equilibrium Green functions. The strategy employed to obtain some heterostructures free from dislocations is based on the realization of nano-diodes in the following two approaches. The first approach "bottom-up" implements the technique of selective epitaxy on nano-patterned GaN template. The second approach called "top down" is based on the reduction of device size and consequently the number of dislocations. The electrical characteristics of these nano-diodes have been measured by FIB, Nanoprobe and vector network analyzer. The negative differential resistance is studied depending in both direction of bias, electrical treatment, temperature and aluminum incorporation in the AlGaN barriers layers.- The high electron mobility transistors AlGaN/GaN: the second part was aimed to perform a conventional AlGaN/GaN HEMT structure exhibiting in the state of the art performance. To do that, we focused on improving the resistivity of the GaN buffer layer by incorporating either of aluminum or boron. Several positions and thicknesses of BGaN layer in the conventional AlGaN /GaN HEMT structure were tested to determine the optimal structure. Comparative studies between AlGaN/GaN HEMT structures with and without BGaN layer have shown that the use of BGaN layer as a back-barrier drastically improves the carrier confinement in the 2DEG channel and significantly reduces the residual doping of the active area
Defrance, Nicolas. "Caractérisation et modélisation de dispositifs de la filière nitrure pour la conception de circuits intégrés de puissance hyperfréquences." Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-Defrance.pdf.
Повний текст джерелаAroulanda, Sébastien. "Co-intégration de HEMT GaN hyperfréquence normally-off avec des normally-on." Thesis, Lille, 2020. http://www.theses.fr/2020LILUI083.
Повний текст джерелаIn the context of high frequency devices fabrication, normally-off transistors offer two benefits: they eliminate the need of a negative voltage supply in the case of Monolithic Microwave Integrated Circuit (MMIC) and would allow the fabrication of logic circuits if integrated with normally-on HEMT.This manuscript exposes the work performed to develop a normally-off HEMT fabrication process compatible with the fabrication of normally-on transistors. To achieve this, we studied two technologies: one based on the combination of a gate recess, fluorine implantation under the gate and gate-oxide deposition while the other is based on the nanostructuration of the source-drain region in order to make GaN FinFET. The first process gave us normally-off transistors with threshold voltage of 1,4 V associated with current density of about 1 A/mm. However, these devices suffer from significant trap effects that are probably due to the gate oxide. The FinFET technology we have developed, as a first trial, still needs a lot of optimization but showed promising results. While a topology lead to an increase of the threshold voltage of about + 3 V compared to the reference, an other one lead to a doubling of the current density
Comyn, Rémi. "Développement de briques technologiques pour la co-intégration par l’épitaxie de transistors HEMTs AlGaN/GaN sur MOS silicium." Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/9891.
Повний текст джерелаAltuntas, Philippe. "Fabrication et caractérisation de dispositifs de type HEMT de la filière GaN pour des applications de puissance hyperfréquence." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10131/document.
Повний текст джерелаGallium Nitride (GaN) based High Electron Mobility Transistors (HEMTs) have emerged as the best candidate for high temperature, high voltage and high power operation in millimeter-wave range. The unique combination of high breakdown field, high electron velocity, and large sheet electron densities of III-N material permits outstanding performance. The work was performed within IEMN laboratory in Microwave Power Devices group. It relates the fabrication and the characterization of GaN HEMT devices for microwave power applications. The first part exposes the physical and electrical properties of gallium nitride as well as a review concerning the state of the art in terms of output power density related to GaN HEMTs. The second chapter deals with the technological processes with a particular attention on the process optimization regarding the ohmic contact and the T-gate technology. Despite outstanding properties, the HEMT performance remains inherently limited by physical and electrical parasitic phenomena. Thus, the third chapter presents the whole studies performed in other to understand these limitation effects (losses, traps, thermal effect). In the last chapter DC, RF, pulsed and large signal measurements are reported for HEMTs based on different heterostructures. In particular, the capability of AlGaN/GaN transistors on Si(111) substrate grown by MBE is demonstrated for high frequency microwave power applications at 40GHz with a continuous wave output power density of 2.7W/mm associated with a power added efficiency of 12.5% and a linear gain of 6.5dB corresponding to the highest saturated power density ever reported on Si(111) substrate to date
Olivier, Aurélien. "Fabrication et caractérisation des transistors à effet de champ de la filière III-V pour applications basse consommation." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10162/document.
Повний текст джерелаAn autonomous system is composed of a sensor, a digital controller, a communication interface and an energy source. Its consumption should be less than about 100 microW. To reduce power consumption, new components called the Green transistors have appeared in various topologies, operating modes and alternative materials to silicon. The communication interface consists of a transistor with high performances at low power supply. The topologies used are the high electron mobility transistor (HEMT) and the metal-oxide-semiconductor field-effect transistor (MOSFET) and only III-V-based channels with low bandgap energy, low effective mass and high electron mobility should achieve these goals. Antimonide based HEMTs (AlSb/InAs) and InGaAs MOSFETs technologies have been developed. Measurements of transistors AlSb /InAs HEMTs showed performance above 100GHz at 10mW/mm at room and cryogenic temperatures and transistors which 1mW/mm equals to 10GHz can be expected. However, significant gate currents and a high aspect ratio in a HEMT structure limit the reduction the factor of merit between the power and the cut-off frequency. Thus, the technology of InGaAs MOSFET has been characterized during this work and the RF results are promising (fT = 120GHz, Lg = 200nm) even if the process fabrication is not fully optimized. A perspective of this work is the use of antimonide materials for the realization of ultra low power MOSFET
Ramirez-garcia, Eloy. "Analyse expérimentale et modélisation du bruit haute fréquence des transistors bipolaires à hétérojonctions SiGe et InGaAs/InP pour les applications très hautes fréquences." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112082/document.
Повний текст джерелаIn order to fulfil the roadmap for the development of telecommunication and information technologies (TIC), low noise level and very fast semiconductor devices are required. Heterojunction bipolar transistor has demonstrated excellent high frequency performances and becomes a candidate to address TIC roadmap. This work deals with experimental analysis and high frequency noise modelling of Si/SiGe:C HBT (STMicroelectronics tech.) and InP/InGaAs HBT (III-V Lab Alcatel-Thales).Chapter I introduces the basic concepts of HBTs operation and the characterization at high-frequency. This chapter summarizes the high frequency performances of many state-of-the-art HBT technologies. The first part of chapter II describes the two HBT sets, with paying attention on the impact of the base composition (SiGe:C) or the lateral reduction of the device (InGaAs) on static and dynamic performances. Based on TCAD modelling, the second part shows that a 15-25% germanium composition profile in the base is able to reach highest dynamic performances. Chapter III summarizes the static and dynamic results at low temperature, giving a separation of the intrinsic transit times and charging times involved into the performance limitation. Chapter IV presents noise measurements and the derivation of high frequency noise analytical models. These models highlight the impact of the current crowding and the self-heating effects, and the influence of the base-emitter heterojunction on the high frequency noise. According to these models the high frequency noise performances are estimated at low temperature for both HBT technologies
Ramirez-Garcia, Eloy. "Analyse expérimentale et modélisation du bruit haute fréquence des transistors bipolaires à hétérojonctions SiGe et InGaAs/InP pour les applications très hautes fréquences." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00604071.
Повний текст джерелаFleury, Dominique. "Contribution à l'étude expérimentale du transport dans les transistors de dimensions déca-nanométriques des technologies CMOS sub-45nm." Phd thesis, Grenoble INPG, 2009. http://tel.archives-ouvertes.fr/tel-00461948.
Повний текст джерелаEl, Falahi Khalil. "Contribution à la conception de driver en technologie CMOS SOI pour la commande de transistors JFET SiC pour un environnement de haute température." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00770657.
Повний текст джерелаFalahi, Khalil El. "Contribution à la conception de driver en technologie CMOS SOI pour la commande de transistors JFET SiC pour un environnement de haute température." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0056/document.
Повний текст джерелаIn aeronautics, electrical systems progressively replace mechanical and hydraulic control systems. If the electronics can stand the absence of cooling, the immediate advantages will be the reduction of mass, increased performances, admissible reliability and thus reduction of costs. In aircraft, some important steps have already been performed successfully when substituting standard systems by electrical control system such as electrical brakes, thrust reverser, electrical actuators for flight control… Large band gap semiconductors (SiC, GaN…) have eased the operation in high temperature over the last decade and let overcome a weakness of conventional silicon systems (Si). High temperature power components such as Schottky diodes or JFET transistors, are already commercially available for a use up to 220°C, limited by package. Moreover inverters based on SiC JFET transistors have been realized and characterized at high temperature. Finally the control part of these power systems needs to be designed for harsh environment. It is in this context of lack of integrated control part that the FNRAE COTECH project and my doctoral research have been built. Based on a state of the art about drivers, the complex link between electronic and temperature and the potentialities of CMOS Silicon-On-Insulator technology (SOI) for high temperature applications have been underlined. The characterization of commercial SOI drivers gives essential data on these systems and their behavior at high temperature. These measurements also highlight the practical limitations of SOI technologies. The main part of this manuscript concerns the design and characterization of functions or IPs for high temperature JFET SiC driver. Two SOI runs in TFSmart1 have been realized. The developed functions include the driver output stage, associated buffers and protection functions. The drivers have been tested from -50°C up to 250°C without failure under short time-range. Moreover, an original protection function has been demonstrated against the short-circuit of an inverter leg. This function allows overcoming the main limitation of the normally on JFET transistor. Finally, an inverter module has been built for in-situ test of these new drivers
Latrach, Soumaya. "Optimisation et analyse des propriétés de transport électroniques dans les structures à base des matériaux AlInN/GaN." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4243.
Повний текст джерелаIII-N materials have made a significant gain in component performance for power electronics applications. The major potential of GaN for these applications lies in its large breakdown field resulting from its wide bandgap, high polarization field and high electronic saturation velocity. AlGaN/GaN heterostructures have been, until recently, the system of choice for power electronics. The limits are known and alternatives are studied to overcome them. Thus, lattice matched InAlN/GaN heterostructures have attracted a great deal of research interest, especially for high frequency power electronic applications. The aim in this work of thesis consists in developing and in characterizing High Electron Mobility Transistors (HEMTs) to establish correlations between structural, electrical defects and technologic processes. A study will therefore be conducted on the characterization of AlGaN/GaN components to enhance the parameters of growth susceptible to have a notable impact on the structural and electrical quality of the structure, in particular on the electrical isolation of the buffer layers and the transport properties. For InAlN/GaN HEMTs, the objective is to evaluate the quality of the barrier layer. For this, a study of the influence of the thickness as well as the composition of the barrier will be conducted. The combination of these studies will allow identifying the optimum structure. Then, the analysis of Schottky contacts by measurements of current and capacity at different temperatures will allow us to identify the several conduction modes through the barrier. Finally, the effects of traps which constitute one of the fundamental limits inherent to the studied materials will be characterized by various defects spectroscopy methods
Mogniotte, Jean-François. "Conception d'un circuit intégré en SiC appliqué aux convertisseur de moyenne puissance." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0004/document.
Повний текст джерелаThe new SiC power switches is able to consider power converters, which could operate in harsh environments as in High Voltage (> 10kV) and High Temperature (> 300 °C). Currently, they are no specific solutions for controlling these devices in harsh environments. The development of elementary functions in SiC is a preliminary step toward the realization of a first demonstrator for these fields of applications. AMPERE laboratory (France) and the National Center of Microelectronic of Barcelona (Spain) have elaborated an elementary electrical compound, which is a lateral dual gate MESFET in Silicon Carbide (SiC). The purpose of this research is to conceive a monolithic power converter and its driver in SiC. The scientific approach has consisted of defining in a first time a SPICE model of the elementary MESFET from electric characterizations (fitting). Analog functions as : comparator, ring oscillator, Schmitt’s trigger . . . have been designed thanks to this SPICE’s model. A device based on a bridge rectifier, a regulated "boost" and its driver has been established and simulated with the SPICE Simulator. The converter has been sized for supplying 2.2 W for an area of 0.27 cm2. This device has been fabricated at CNM of Barcelona on semi-insulating SiC substrate. The electrical characterizations of the lateral compounds (resistors, diodes, MESFETs) checked the design, the "sizing" and the manufacturing process of these elementary devices and analog functions. The experimental results is able to considerer a monolithic driver in Wide Band Gap. The prospects of this research is now to realize a fully integrated power converter in SiC and study its behavior in harsh environments (especially in high temperature > 300 °C). Analysis of degradation mechanisms and reliability of the power converters would be so considerer in the future
Comyn, Rémi. "Développement de briques technologiques pour la co-intégration par l'épitaxie de transistors HEMTs AlGaN/GaN sur MOS silicium." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4098.
Повний текст джерелаThe monolithic integration of heterogeneous devices and materials such as III-N compounds with silicon (Si) CMOS technology paves the way for new circuits applications and capabilities for both technologies. However, the heteroepitaxy of such materials on Si can be challenging due to very different lattice parameters and thermal expansion coefficients. In addition, contamination issues and thermal budget constraints on CMOS technology may prevent the use of standard process parameters and require various manufacturing trade-offs. In this context, we have investigated the integration of GaN-based high electron mobility transistors (HEMTs) on Si substrates in view of the monolithic integration of GaN on CMOS circuits
Long, Sabine. "Etude du bruit dans les composants et circuits actifs aux fréquences millimétriques." Toulouse 3, 2002. http://www.theses.fr/2002TOU30164.
Повний текст джерелаZborowski, Charlotte. "Characterization of deeply buried interfaces by Hard X-ray Photoelectron Spectroscopy." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEC025/document.
Повний текст джерелаThis thesis aims at improving the inelastic background analysis method in order to apply it to technologically relevant samples. Actually, these improvements are utterly needed as they concern criteria of accuracy and time saving particularly for analysis of devices presenting deeply buried layers with different materials. For this purpose, the interest of the inelastic background analysis method is at its best when combined with hard X-ray photoelectron spectroscopy (HAXPES) because HAXPES allows to probe deeper in the sample than with conventional X-ray photoelectron spectroscopy (XPS). The present work deals with technologically relevant samples, mainly the high-electron mobility transistor (HEMT), at some crucial steps of their fabrication process as annealing. Actually, it is very important that these analyses shall be performed non-destructively in order to preserve the buried interfaces. These are often the location of complex phenomena that are critical for device performances and a better understanding is often a prerequisite for any improvement. In this thesis, the in-depth diffusion phenomena are studied with the inelastic background analysis technique (using the QUASES software) combined with HAXPES for depth up to 60 nm. The depth distribution results are determined with deviations from TEM measurements smaller than a typical value of 5%. The choice of the input parameters of the method is discussed over a large range of samples and simple rules are derived which make the actual analysis easier and faster to perform. Finally, it was shown that spectromicroscopy obtained with the HAXPEEM technique can provide spectra at each pixel usable for inelastic background analysis. This is a proof of principle that it can provide a 3D mapping of the elemental depth distribution with a nondestructive method
Denne afhandling har til formål at forbedre den uelastiske baggrundsanalysemetode til anvendelser i den til teknologiske industri. Faktisk er disse forbedringer absolut nødvendige, for at opnå nøjagtighed og tidsbesparelse, især for analyse af prøver med dybt begravede lag af forskellige materialer. Til det formål er interessen for den uelastiske baggrundsanalysemetode bedst i kombination med hård røntgenfotoelektron-spektroskopi (HAXPES), fordi HAXPES gør det muligt at probe dybere i prøven end med konventionel røntgenfotoelektron-spektroskopi (XPS). Dette arbejde beskæftiger sig med teknologisk relevante prøver, hovedsagelig høj-elektron mobilitetstransistor (HEMT), på nogle afgørende trin i deres fremstillingsproces som fx annealing. Faktisk er det meget vigtigt, at disse analyser udføres på en ikke-destruktiv måde for at bevare de begravede grænseflader. Det er ofte her de komplekse fysiske fænomener opstår, som er kritiske for fuktionaliteten, og en bedre forståelse af grænsefladerne er ofte en forudsætning for at kunne forbedre denne. I denne afhandling studeres de dybdegående diffusionsfænomener med den uelastiske baggrundsanalyse teknik (ved hjælp af QUASES software) kombineret med HAXPES for dybder op til 60 nm. Dybdestributionsresultaterne har afvigelser fra TEM-målinger mindre end en typisk værdi på 5%. Valget af input parametre for metoden er diskuteret på bagground af et stort udvalg af prøver samt omfattende simuleringer og enkle regler er udledt, hvilket gør den praktiske analyse nemmere og hurtigere at udføre. Endelig blev det vist, at spektromikroskopi opnået med HAXPEEM-teknikken kan tilvejebringe spektre ved hver enkelt pixel som kan anvendes til uelastisk baggrundsanalyse. Dette viser at i princippet kan en 3D-billeddannelse af den elementære dybdefordeling bestemmes ikke destruktivt
El, Bondry Nadia. "Epitaxie d’hétérostructures innovantes pour la montée en fréquence des HEMTs à base de GaN." Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4080.
Повний текст джерелаThis thesis focuses on the design, the fabrication and the characterization of GaN-based high electron mobility transistors (HEMTs) including the localised regrowth of highly doped n-type GaN to side contact the bi-dimensional electron gas (2DEG). These regrowth regions have the particularity of being in direct contact with the 2DEG, resulting in lower ohmic contact resistances. The approach developed here also ensures better lateral definition of the contacts by avoiding or reducing the high-temperature anneal of ohmic contacts, which is responsible for metal diffusion. This allows the reduction of the distance between source and drain contacts, resulting in an increase of the operating frequency and of the efficiency of the transistors. This thesis covers three main topics: the study of the localized growth of heavily n-doped GaN regions by two epitaxy techniques widely used in the field (MBE and MOVPE), the development of the technological manufacturing process and the electrical characterization of transistors with n-GaN regrowth at the ohmic contacts. The study was carried out on different HEMT structures with ternary (AlGaN) and quaternary (InAlGaN) alloy barriers. We took into account and studied several parameters, including the topology of the devices, the metallization schemes, the doping level and the conductivity of the n-GaN layers. In addition, we studied suitable surface preparations before the regrowth as well as the impact of the n-GaN growth conditions on the critical interface zone between the 2DEG and the n-GaN. We extracted the contact resistances on a large number of samples from the measurements of Transmission Line Method (TLM) patterns in order to quantify the different contributions, including the quality of the interface. We then used the best sets of parameters to fabricate GaN-based RF devices and we investigated their DC characteristics and RF performances