Download or read book Interfaces silicium silicium obtenues par soudure directe proprietes electriques et influence du mode de preparation des plaquettes written by Pascal Lecerf and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Etudes des interfaces silicium silicium obtenues par soudure directe de plaquettes written by Angéline Laporte and published by . This book was released on 1995 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES LIMITATIONS DE LA FILIERE TECHNOLOGIQUE DES CIRCUITS DE PUISSANCE INTELLIGENTE (DANS LA GAMME DES HAUTES TENSIONS, 1000V-1500V ET FORTS COURANTS, 1A-20A) BASEE SUR LA SOUDURE DIRECTE SUR SILICIUM ONT ETE ETABLIES. L'INTERFACE SI-SI N'EST PAS ELECTRIQUEMENT NEUTRE ET SA PRESENCE DANS LA PARTIE ACTIVE DU COMPOSANT DE PUISSANCE VERTICAL DEGRADE SA TENUE EN TENSION ET SON GAIN EN COURANT. LES VARIATIONS DE LA DENSITE DE PORTEURS AU NIVEAU DE L'INTERFACE (MESUREE PAR SPREADING RESISTANCE DUES A DES CHARGES OU ETATS D'INTERFACE POSITIFS PEUVENT ETRE A L'ORIGINE DE CES DEGRADATIONS. LA DENSITE DE CES CHARGES EST CONTROLEE PAR LA DENSITE DE DEFAUTS PRESENTS A L'INTERFACE (DISLOCATIONS VIS ET A 60 ANALYSEES PAR MICROSCOPIE ELECTRONIQUE EN TRANSMISSION EN VUE PLANE), PAR LA CONCENTRATION EN CARBONE QUI PEUT FAVORISER LA FORMATION D'AGGREGATS DE SIOX ELECTRIQUEMENT ACTIFS ET SURTOUT PAR LES CONTRAINTES A L'ASSEMBLAGE. LE SIGNE DE CES CHARGES EST DEFINIE PAR LE TYPE NETTOYAGE AVANT L'ASSEMBLAGE. LES PARAMETRES TECHNOLOGIQUES QUI CONTROLENT LES PROPRIETES ELECTRIQUES DE L'INTERFACE SONT DONC LES CONTRAINTES A L'ASSEMBLAGE, LES DESORIENTATIONS (A L'ASSEMBLAGE ET LA VICINALITE DES PLAQUETTES RESPONSABLES DES DEFAUTS D'INTERFACE), LA CONCENTRATION EN CARBONE. LORSQU'ILS SONT OPTIMISES LA DENSITE D'ETATS AUX INTERFACES P/P PEUT ETRE INFERIEURE A 3.10#1#0CM#-#2
Download or read book Contribution l tude des interfaces de soudure directe dans le silicium written by Mourad Benamara and published by . This book was released on 1996 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: AFIN DE REPONDRE DE LA FAISABILITE D'UNE FILIERE TECHNOLOGIQUE DE CIRCUITS INTEGRES DE PUISSANCE BASEE SUR LA SOUDURE DIRECTE SUR SILICIUM, DES ETUDES PRELIMINAIRES SONT ENTREPRISES ET MONTRENT CLAIREMENT QUE L'INTERFACE SI/SI N'EST PAS ELECTRIQUEMENT NEUTRE. APRES AVOIR MIS AU POINT UNE PROCEDURE EXPERIMENTALE POUR REALISER DES INTERFACES SI/SI DE FACON REPRODUCTIBLE, NOUS AVONS ETUDIE L'INTERFACE DE SOUDURE D'UN POINT DE VUE PHYSIQUE ET ELECTRIQUE. LA MICROSCOPIE ELECTRONIQUE EN TRANSMISSION MONTRE QUE LA STRUCTURE DE CES INTERFACES EST AINSI CONSTITUEE DE DEUX RESEAUX DE DISLOCATIONS QUI PERMETTENT DE RATTRAPER EXACTEMENT LA DESORIENTATION RELATIVE DES DEUX CRISTAUX. LE PREMIER BIDIMENSIONNEL EST CONSTITUE DE DISLOCATIONS DE TYPE PUREMENT VIS ORGANISEES EN RESEAU CARRE ET PERMET DE RATTRAPER LA COMPOSANTE DE TORSION (JUSQU'A 15) ENTRE LES DEUX PLAQUETTES. LE SECOND EST UN RESEAU DE DISLOCATIONS A 60 QUI COMPENSE UNE FAIBLE COMPOSANTE DE FLEXION. LES PROFILS DE DENSITE DE PORTEURS AU NIVEAU DE L'INTERFACE (MESURES PAR SPREADING RESISTANCE) DEMONTRE QUE L'INTERFACE SI/SI EST LE SIEGE DE CHARGES POSITIVES DONT LA DENSITE EST ETROITEMENT LIEE A LA DENSITE DE DEFAUTS PRESENTS A L'INTERFACE. LES ORIGINES PHYSIQUES POSSIBLES DE CES CHARGES SONT DISCUTEES ET SONT LES DISLOCATIONS DE DESORIENTATION, LES PRECIPITES (PP) DE SILICE (ETATS DONNEUR A L'INTERFACE PP/MATRICE SILICIUM) DONT LA DENSITE CROIT AVEC LA DESORIENTATION, ET DES CLUSTERS SIO#X DE TYPE DONNEUR OU DOUBLE-DONNEUR DONT LA CINETIQUE DE FORMATION EST FAVORISEE PAR LA PRESENCE DU CARBONE. PAR AILLEURS, LES MESURES DE COURANT EBIC (ELECTRON BEAM INDUCED CURRENT) DEMONTRENT QUE L'UTILISATION DE PLAQUETTES FZ PERMET DE REDUIRE CONSIDERABLEMENT L'ACTIVITE RECOMBINANTE DE CES INTERFACES. D'UNE FACON GENERALE, CE TRAVAIL DEMONTRE QUE L'OPTIMISATION DES PROPRIETES ELECTRIQUES DE CES INTERFACES REQUIERT L'UTILISATION DE PLAQUETTES FZ ET PASSE PAR LE CONTROLE DE LEUR DESORIENTATION LORS DE L'ASSEMBLAGE
Download or read book Soudure directe silicium sur silicium written by Damien Valente and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ces travaux de thèse accompagnent le développement de nouvelles architectures d'interrupteurs monolithiques bidirectionnels en courant et en tension. L'une des voies technologiques proposées consiste à contrôler les propriétés électriques de l'interface de soudure Si-Si. Nous avons mis en évidence la nature complexe de l'activité électrique de l'interface avec l'existence d'un continuum d'états d'énergie au caractère recombinant. L'intégration d'une telle brique technologique nécessite alors la maîtrise de la passivation/décoration de l'interface par diffusion d'impuretés. La passivation des états d'interfaces par hydrogénation a montré une amélioration des propriétés électriques globales de l'interface de soudure avec une réduction de la dispersion des paramètres électriques. Une contamination contrôlée par diffusion de platine, nous a permis d'obtenir une désactivation, voire une compensation, du phosphore à l'interface, accompagnée d'une disparition des niveaux profonds.
Download or read book LA SOUDURE DIRECTE SILICIUM SILICIUM APPLICATIONS AUX CAPTEURS INTEGRES written by LIONEL.. BABADJIAN and published by . This book was released on 1992 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL CONSISTE A ETUDIER LA SOUDURE DIRECTE SILICIUM/SILICIUM AINSI QUE SES APPLICATIONS DANS LE DOMAINE DES CAPTEURS INTEGRES. APRES UN CHAPITRE DE PRESENTATION DES TECHNOLOGIES EMPLOYEES POUR LA FABRICATION DES CAPTEURS EN SILICIUM, NOUS NOUS INTERESSONS, DANS LE SECOND CHAPITRE, AUX MECANISMES DE LA SOUDURE DIRECTE EN S'APPUYANT SUR LES PROPRIETES DE SURFACE DE CE SEMICONDUCTEUR. NOUS AVONS DEVELOPPE DES MOYENS DE CARACTERISATION OPTIQUES, MECANIQUES ET ELECTRIQUES AFIN D'OBSERVER L'INFLUENCE DES PARAMETRES TECHNOLOGIQUES. ENFIN DANS LE TROISIEME CHAPITRE NOUS EXPLOITONS CE MOYEN D'ASSEMBLAGE POUR L'ETUDE ET LA REALISATION DE DEMONSTRATEURS ET NOUS PROPOSONS UNE FILIERE TECHNOLOGIQUE ORIGINALE POUR LA FABRICATION MONOLITHIQUE DES CAPTEURS ET DE L'ELECTRONIQUE
Download or read book Adhesion Between Polymers and Concrete Adh sion Entre Polym res Et B ton written by H. R. Sasse and published by Springer. This book was released on 1986 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Download or read book Color Television Receivers written by and published by . This book was released on 1978 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report to the President on investigation no. 332-95 under section 332 of the Tariff Act of 1930, as amended.
Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Download or read book Diffusion in Materials DIMAT 2011 written by Igor Bezverkhyy and published by Trans Tech Publications Ltd. This book was released on 2012-04-12 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Diffusion in Materials (DIMAT) is the benchmark conference series for diffusion in solids. DIMAT 2011 was organized by the University of Bourgogne in association with CNRS, Dijon (France). The conference showcased new results concerning theoretical tools as well as applied research approaches. Diffusion processes affect all types of materials: nanomaterials, materials for energy, metallurgy, glasses and ceramics, but each requires its own numerical tools. Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises most of the contributions presented at DIMAT 2011: 4 plenary lectures delivered by famous high-level scientists plus 88 contributions in the form of keynote lectures, talks and posters.
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Download or read book Nuclear Accident Dosimetry written by H. J. Delafield and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Dictionary of Pakistan written by Shahid Javed Burki and published by . This book was released on 1999 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pakistan is unlike most other countries in the emerging world. It is one of the two nations – the other being the state of Israel – founded on the basis of religion. Although it was created to provide a homeland for the Muslim community of British India, in its original form it was able to accommodate only about half of the people of Islamic faith who lived in the subcontinent. Pakistan’s birth in 1947 resulted in one of the largest movements of people in human history when some 14 million people left their homes, with 8 million Muslims leaving India for what is now Pakistan and 6 million Hindus and Sikhs moving in the opposite direction. This was the first large-scale incidence of ethnic cleansing the world was to witness. --
Download or read book Personnel Dosimetry for Radiation Accidents written by and published by . This book was released on 1965 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
