Download or read book Caract risation de structures MIS par spectroscopie d admittance valuation du comportement dynamique des d fauts l interface isolant semiconducteur written by Emmanuel Duval and published by . This book was released on 2001 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les défauts à l'interface isolant-semiconducteur sont étudiés sur des structures MIS d'orientation 100 par trois techniques de caractérisation électrique complémentaires : la spectroscopie de conductance G([omega]), la méthode capacitive C(V) et l'analyse de capacité assistée de rayonnements ultraviolets. L'utilité des hautes températures comme paramètre de mesure supplémentaire a été mise en évidence. La comparaison entre la méthode conductive G([omega],T) et capacitive C(V,T) désigne la première comme étant la plus performante. La spectroscopie G([omega],T) autorise la séparation des contributions des états lents et rapides. Par ailleurs, elle conduit à la détection de niveaux donneurs et accepteurs associés à la présence de défauts trivalents. Cette détection est confirmée par les mesures de capacité sous rayonnement UV. Les résultats observés en terme de densité et de section efficace de capture sont en accord avec ceux publiés à partir d'autres méthodes de caractérisation. Ce travail montre que la spectroscopie de conductance est un outil très performant pour quantifier la contribution des états lents et rapides et pour l'identification de défauts trivalents à l'interface isolant-semiconducteur.
Download or read book ANALYSE PAR SPECTROSCOPIE D ADMITTANCE D INTERFACES PASSIVEES DANS DES HETEROSTRUCTURES METAL ISOLANT HG 0 8ZN 0 2 TE ETUDE DU COMPORTEMENT BIDIMENSIONNEL DU GAZ D ELECTRONS EN REGIME DE FORTE INVERSION written by OLIVIER.. ROUSIERE and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE MATERIAU SEMICONDUCTEUR PSEUDOBINAIRE HG#0#.#8ZN#0#.#2 TE (OU MZT 0,2) EST CARACTERISE PAR UNE VALEUR DE BANDE INTERDITE EGALE A 256 MEV A 77K ET PEUT DONC ETRE UTILISE POUR LA REALISATION DE DETECTEURS INFRAROUGE CORRESPONDANT A LA FENETRE DE TRANSMISSION ATMOSPHERIQUE COMPRISE ENTRE 3,5 ET 5M. IL CONCURRENCE LE MATERIAU HGCDTE PUISQUE LA LIAISON HG-TE EST RENFORCEE PAR L'ALLIAGE AVEC ZNTE. LA FABRICATION DE TELS COMPOSANTS NECESSITE L'OBTENTION D'INTERFACES DE TRES BONNE QUALITE. L'UTILISATION DE NOUVEAUX ECHANTILLONS OBTENUS PAR TRAVELLING HEATER METHOD ET AYANT SUBI UNE RECRISTALLISATION EN PHASE SOLIDE A PERMIS D'OBTENIR DES STRUCTURES METAL-ISOLANT-SEMICONDUCTEUR AUX CARACTERISTIQUES FIABLES ET REPRODUCTIBLES. LA SPECTROSCOPIE D'ADMITTANCE, REALISEE SUR DES STRUCTURES MIS FABRIQUEES DANS LE LABORATOIRE UTILISANT LE MATERIAU (MZT 0,2) DE TYPE P, A PERMIS DE CARACTERISER LES SURFACES PASSIVEES A PARTIR DE TROIS PROCEDES DIFFERENTS : LA PASSIVATION PAR TREMPAGE, CHIMIQUE (DANS UNE SOLUTION DE BROME-METHANOL CONTENANT L'ELEMENT PASSIVANT) ET ELECTROCHIMIQUE. LA FLUORATION ELECTROCHIMIQUE AVEC KF, LES SULFURATIONS ELECTROCHIMIQUE OU CHIMIQUE AVEC (NH#4)#2S ET L'OXYDATION ANODIQUE AVEC KOH ONT EU POUR RESULTAT DE DEGRADER LA QUALITE D'INTERFACE PAR RAPPORT AU CAS DEPOT DIRECT D'ISOLANT. LA SULFURATION ANODIQUE AVEC NA#2S A PERMIS D'AMELIORER LA QUALITE D'INTERFACE PAR RAPPORT AU CAS DU DEPOT DIRECT D'ISOLANT ET DE L'OXYDATION ANODIQUE. DES ANALYSE XPS MONTRENT QUE LA COUCHE DE SULFURATION EST PROBABLEMENT COMPOSEE DE ZNS. LA SULFURATION CHIMIQUE AVEC NA#2S EST LA METHODE DE PASSIVATION QUI A PERMIS D'OBTENIR LA MEILLEURE QUALITE D'INTERFACE (DENSITES D'ETATS RAPIDES D'INTERFACE LES PLUS FAIBLES, FAIBLES RUGOSITES OBSERVEES EN MICROSCOPIE DE FORCE ATOMIQUE) ET D'OBSERVER LE COMPORTEMENT BIDIMENSIONNEL DES ELECTRONS PRESENTS A L'INTERFACE SEMICONDUCTEUR-ISOLANT DE LA STRUCTURE MIS LORSQU'ELLE EST POLARISEE EN FORTE INVERSION. L'UTILISATION DE PLUSIEURS METHODES DE CALCUL, DONT LA METHODE DE PROPAGATION PRENANT EN COMPTE LA VARIATION DE LA MASSE EFFECTIVE LE LONG DES NIVEAUX, A PERMIS DE COMPARER LES ENERGIES E#0 ET E#1 CALCULEES ET MESUREES. LES ECARTS SONT INFERIEURS A L'INCERTITUDE EXPERIMENTALES SUR CES ENERGIES TELLES QUE DEDUITES DES COURBES C-V MESUREES.
Download or read book Nouvelle m thode d investigation par effet Hall des tats d interface dans les composants base d h t rostructures III V written by Olivier Callen and published by . This book was released on 2000 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE DEMONTRE L'INTERET DES HETEROSTRUCTURES SEMI-CONDUCTRICES POUR LA CARACTERISATION DES ETATS PRESENTS AUX INTERFACES DIELECTRIQUE/SEMI-CONDUCTEUR (D/SC), ETATS QUI JOUENT UN ROLE IMPORTANT DANS LES COMPOSANTS ELECTRONIQUES ACTUELS. DEUX METHODES ORIGINALES DE CARACTERISATION DE L'INTERFACE D/SC SONT PROPOSEES. LA PREMIERE EST UNE METHODE DE MESURE DU SPECTRE DIT(E) DES ETATS D'INTERFACE. ELLE EST BASEE SUR LA MESURE DE LA DENSITE DE PORTEURS NS DANS DES MOTIFS DE HALL RECOUVERTS DU DIELECTRIQUE A CARACTERISER ET EQUIPES D'UNE GRILLE METALLIQUE (STRUCTURES MIS-H : METAL-ISOLANT-SEMICONDUCTEUR A HETEROSTRUCTURE). DANS CES STRUCTURES, NS EST EN EFFET L'IMAGE DIRECTE DU NIVEAU DE FERMI A LA SURFACE DU SC. CETTE PROPRIETE PERMET D'ACCEDER A DIT PAR LA MESURE DC DE LA TENSION DE HALL EN FONCTION DE LA TENSION DE GRILLE VG. CETTE METHODE SE DISTINGUE DES METHODES USUELLES (C-V, ANALYSE DE LA CONDUCTANCE ET DLTS) PAR SA PRECISION, SA CAPACITE A MESURER DES DENSITES D'ETATS ELEVEES ET SA FACILITE DE MISE EN UVRE. LA SECONDE METHODE, BAPTISEE CFTS (SPECTROSCOPIE PAR ANALYSE DE TRANSITOIRES EFFECTUES A NIVEAU DE FERMI CONSTANT), PERMET DE SITUER DIT PAR RAPPORT A LA BANDE INTERDITE DU SC. ELLE EST BASEE SUR LA FIXATION PAR UN ASSERVISSEMENT EXTERNE DU NIVEAU DE FERMI DANS LA STRUCTURE. A L'INTERFACE SINX/GAAS, NOUS MESURONS UN SPECTRE DIT A PROFIL EN U AVEC UN MINIMUM DE 4.10 1 2 CM 2.EV 1 SITUE A 0.8 EV DU MINIMUM DE LA BANDE DE CONDUCTION. LES SPECTRES OBTENUS ONT ETE INTRODUITS DANS UN MODELE DETAILLE DE LA REPONSE DYNAMIQUE DES COMPOSANTS. L'EXCELLENT ACCORD MESURES/MODELE, QUEL QUE SOIT LE REGIME D'EXCITATION DE VG (CONTINU, ALTERNATIF ET TRANSITOIRE), CONFIRME LA VALIDITE DE LA METHODE DE DETERMINATION DE DIT ET LA COHERENCE DE LA MODELISATION PROPOSEE. CES DEUX METHODES COMPOSENT UN ENSEMBLE COHERENT DE CARACTERISATION DES ETATS D'INTERFACE DANS UNE HETEROSTRUCTURE, APPLICABLE QUELLE QUE SOIT LA FILIERE TECHNOLOGIQUE DES HETEROSTRUCTURES.
Download or read book DEVELOPPEMENT DES METHODES DE SPECTROSCOPIE CAPACITIVE ET APPLICATIONS A LA CARACTERISATION DE DEFAUTS D INTERFACE ET DE VOLUME DANS LES SEMICONDUCTEURS written by Franck Murray and published by . This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONDITIONS D'UTILISATION DE SPECTROMETRIE TRANSITOIRE DE NIVEAU PROFOND CLASSIQUE ET OPTIQUE. CAS DES ETATS D'INTERFACE ISOLANT-SEMICONDUCTEUR, EFFET DE LA DENSITE. ETUDE DES STRUCTURES MIS ET MOS. DANS LE CAS DE DEFAUTS D'IRRADIAITON PAR LES IONS LOURDS DE FORTE ENERGIE DANS LE SILICIUM, TROIS PIEGES A PORTEURS MAJORITAIRES ET SIX PIEGES A PORTEURS MINORITAIRES ONT ETE IDENTIFIES PAR SPECTROMETRIE TRANSITOIRE DE NIVEAU PROFOND NORMALE ET OPTIQUE
Download or read book CARACTERISATION DE STRUCTURES MIS PAR METHODES ELECTRIQUES ET PAR ELLIPSOMETRIE SPECTROSCOPIQUE written by Jean-Philippe Piel and published by . This book was released on 1987 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON CARACTERISE A L'AIDE DE DEUX TECHNIQUES PLUSIEURS TYPES DE DEPOTS D'ISOLANTS (SIO::(2) ET SI::(3)N::(4)) SUR INP SUSCEPTIBLES DE L'INTEGRER DANS LA TECHNOLOGIE DU TRANSISTOR A EFFET CHAMP A GRILLE ISOLEE. ON EVALUE, PAR LA MESURE DE L'ADMITTANCE DES STRUCTURES MIS, LE PROFIL DE DENSITE D'ETATS D'INTERFACE PAR LA METHODE DE LA CONDUCTANCE DE NICOLLIAN ET GOETZBERGER. LA SECONDE METHODE, PAR ELLIPSOMETRIE SPECTROSCOPIQUE CONSISTE A ETUDIER LA REPONSE OPTIQUE DE LA STRUCTURE ISOLANT-SEMICONDUCTEUR SOUMIS A UN FAISCEAU LUMINEUX POLARISE RECTILIGNEMENT. ON DECRIT EN DETAIL L'ENSEMBLE DES CORRECTIONS A APPORTER AUX MESURES BRUTES AFIN DE TENIR COMPTE DES LIMITATIONS DE L'INSTRUMENT. LES SPECTRES EXPERIMENTAUX SONT INTERPRETES A L'AIDE D'UN MODELE MULTICOUCHE
Download or read book Mise au point d un proc d de fabrication de structures m tal isolant semi conducteur M I S written by Hasni Bendouma (auteur d'une thèse de sciences.) and published by . This book was released on 1984 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multifunctional Oxide Heterostructures written by Evgeny Y. Tsymbal and published by OUP Oxford. This book was released on 2012-08-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the rapidly developing field of oxide thin-films and heterostructures. Oxide materials combined with atomic-scale precision in a heterostructure exhibit an abundance of macroscopic physical properties involving the strong coupling between the electronic, spin, and structural degrees of freedom, and the interplay between magnetism, ferroelectricity, and conductivity. Recent advances in thin-film deposition and characterization techniques made possible the experimental realization of such oxide heterostructures, promising novel functionalities and device concepts. The book consists of chapters on some of the key innovations in the field over recent years, including strongly correlated oxide heterostructures, magnetoelectric coupling and multiferroic materials, thermoelectric phenomena, and two-dimensional electron gases at oxide interfaces. The book covers the core principles, describes experimental approaches to fabricate and characterize oxide heterostructures, demonstrates new functional properties of these materials, and provides an overview of novel applications.
Download or read book All it Is It s a Carnival written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Solid State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
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 Data Storage at the Nanoscale written by Gan Fuxi and published by CRC Press. This book was released on 2015-02-09 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the big data era, data storage is one of the cores in the whole information chain, which includes production, transfer, sharing, and finally processing. Over the years, the growth of data volume has been explosive. Today, various storage services need memories with higher density and capacity. Moreover, information storage in the big data applic
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 Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1976 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Download or read book The Development of Plastic Thermite written by R. J. Hancox and published by . This book was released on 1983 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.
Download or read book Unsteady Transonic Flow written by Mårten T. Landahl and published by Courier Dover Publications. This book was released on 2019-04-17 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic monograph on unsteady transonic flow — the flow of air encountered at speeds at or near the speed of sound — is of continuing interest to students and professionals in aerodynamics, fluid dynamics, and other areas of applied mathematics. After a brief Introduction, Swedish physicist Mårten T. Landahl presents a chapter in which the two-dimensional solution is derived, succeeded by a discussion of its relation to the subsonic and supersonic solutions. Three chapters on low aspect ratio configurations follow, covering triangular wings and similar planforms with curved leading edges, rectangular wings, and cropped delta wings, and low aspect ratio wing-body combinations. The treatment concludes with a consideration of the experimental determination of air forces on oscillating wings at transonic speeds.
Download or read book Encapsulations written by Alexandru Grumezescu and published by Academic Press. This book was released on 2016-05-27 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encapsulations, a volume in the Nanotechnology in the Agri-Food Industry series,presents key elements in establishing food quality through the improvement of food flavor and aroma. The major benefits of nanoencapsulation for food ingredients include improvement in bioavailability of flavor and aroma ingredients, improvement in solubility of poor water-soluble ingredients, higher ingredient retention during production process, higher activity levels of encapsulated ingredients, improved shelf life, and controlled release of flavor and aroma. This volume discusses main nanoencapsulation processes such as spray drying, melt injection, extrusion, coacervation, and emulsification. The materials used in nanoencapsulation include lipids, proteins, carbohydrates, cellulose, gums, and food grade polymers. Applications and benefits of nanoencapsulation such as controlled release, protections, and taste masking will be explained in detail. Includes the most up-to-date information on nanoencapsulation and nanocontainer-based delivery of antimicrobials Presents nanomaterials for innovation based on scientific advancements in the field Provides control release strategies to enhance bioactivity, including methods and techniques for research and innovation Provides useful tools to improve the delivery of bioactive molecules and living cells into foods
