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Book Description
LE TRANSISTOR A BASE PERMEABLE EST CONSTITUE D'UNE GRILLE METALLIQUE ENTERREE DANS UN MONOCRISTAL SEMICONDUCTEUR. MAIS POUR QUE CE TRANSISTOR DEVIENNENT INTERESSANT D'UN POINT DE VUE PERFORMANCE, IL FAUT QUE LES DISTANCES ENTRE LES DOIGTS METALLIQUES SOIENT INFERIEURES QU MICRON (SUBMICRON). DISCUSSION SUR LA FAISABILITE D'UN TEL DISPOSITIF ET DES TECHNIQUES LITHOGRAPHIQUES PERMETTANT DE LE REALISER.
Book Description
LE TRANSISTOR A BASE PERMEABLE EST CONSTITUE D'UNE GRILLE METALLIQUE ENTERREE DANS UN MONOCRISTAL SEMICONDUCTEUR. MAIS POUR QUE CE TRANSISTOR DEVIENNENT INTERESSANT D'UN POINT DE VUE PERFORMANCE, IL FAUT QUE LES DISTANCES ENTRE LES DOIGTS METALLIQUES SOIENT INFERIEURES QU MICRON (SUBMICRON). DISCUSSION SUR LA FAISABILITE D'UN TEL DISPOSITIF ET DES TECHNIQUES LITHOGRAPHIQUES PERMETTANT DE LE REALISER.
Book Description
LE TRANSISTOR A BASE PERMEABLE (TBP) EST UN DISPOSITIF ELECTRONIQUE DONT LA PRINCIPALE CARACTERISTIQUE EST UNE BASE METALLIQUE ENTERREE DANS UN SUBSTRAT SEMI-CONDUCTEUR. CETTE THESE PRESENTE LA PREMIERE REALISATION DE TBP SILICIUM ENTIEREMENT COMPATIBLE AVEC DES PROCEDES DE FABRICATION DE DISPOSITIF MOS (METLA-OXYDE-SEMICONDUCTEUR). CETTE COMPATIBILITE EST OBTENUE AU MOYEN D'UNE TECHNOLOGIE TRANCHEES. UN SILICIURE AUTOALIGNE EST UTILISE, FORMANT AVEC LE SEMI-CONDUCTEUR UN CONTACT DE TYPE SCHOTTKY (LA BASE), ET UN CONTACT OHMIQUE (L'EMETTEUR). LA PREMIERE GENERATION DE DISPOSITIFS DE LARGEUR DE GRILLE LEGEREMENT SUBMICRONIQUE, A PERMIS D'EFFECTEUR DES MESURES HYPERFREQUENCE QUI ONT DONNE DES FREQUENCES DE COUPURE DE L'ORDRE DU GHZ. NOUS AVONS ENSUITE DEFINI UNE SECONDE GENERATION DE TRANSISTORS, DE LARGEUR DE GRILLE EGALE A 0,3 M, ET DIRECTEMENT TESTABLES (EN STATIQUE ET EN DYNAMIQUE) SANS REPORT DE CONTACT. NOUS AVONS OBTENU UNE FREQUENCE MAXIMUM DE 3 GHZ, RESULTAT ESSENTIELLEMENT LIMITE PAR LA CAPACITE TRES IMPORTANTE DE LA DIODE BASE-COLLECTEDUR. CES MESURES PERMETTENT DE REMONTER AUX PARAMETRES DU DISPOSITIF INTRINSEQUE ET D'EXTRAPOLER UNE FREQUENCE MAXIMUM DE 26 GHZ
Author: Michael J. Kelly Publisher: Springer Science & Business Media ISBN: 3642714463 Category : Technology & Engineering Languages : en Pages : 481
Book Description
les Houches This Winter School on "The Physics and Fabrication of Microstructures" originated with a European industrial decision to investigate in some detail the potential of custom-designed microstructures for new devices. Beginning in 1985, GEC and THOMSON started a collaboration on these subjects, supported by an ESPRIT grant from the Commission of the European Com munity. To the outside observer of the whole field, it appears clear that the world effort is very largely based in the United States and Japan. It also appears that cooperation and dissemination of results are very well organised outside Europe and act as a major influence on the development of new concepts and devices. In Japan, a main research programme of the Research and Development for Basic Technology for Future Industries is focused on "Future Electron Devices". In Japan and in the United States, many workshops are organised annually in order to bring together the major specialists in industry and academia, allowing fast dissemination of advances and contacts for setting up cooperative efforts.
Author: Michel Andre Aegerter Publisher: Springer Science & Business Media ISBN: 0387889531 Category : Technology & Engineering Languages : en Pages : 474
Book Description
Sol-Gel Techniques for Glass Producers and Users provides technological information, descriptions and characterizations of prototypes, or products already on the market, and illustrates advantages and disadvantages of the sol-gel process in comparison to other methods. The first chapter entitled "Wet Chemical Technology" gives a summary of the basic principles of the sol-gel chemistry. The most promising applications are related to coatings. Chapter 2 describes the various "Wet Chemical Coating Technologies" from glass cleaning to many deposition and post-coating treatment techniques. These include patterning of coatings through direct or indirect techniques which have became very important and for which the sol-gel processing is particularly well adapted. Chapter 3 entitled "Bulk Glass Technologies" reports on the preparation of special glasses for different applications. Chapter 4 entitled "Coatings and Materials Properties" describes the properties of the different coatings and the sol-gel materials, fibers and powders. The chapter also includes a section dedicated to the characterization techniques especially applied to sol-gel coatings and products.
Author: Swapna Mukherjee Publisher: Springer Science & Business Media ISBN: 9400766831 Category : Science Languages : en Pages : 351
Book Description
This book is an attempt to provide a comprehensive and coherent description of three widely separated aspects of clays: the science of clays; the industrial uses of clays; and the role of clays in the environment. Most of the existing literature lacks such an integrated study and this work endeavours to fill that gap. An exhaustive account of the science of clays is presented in Part I of the book, which includes the classification, origin and evolution, composition and internal structure, chemical and physical properties of clays; soil mechanics; and analytical techniques for determining clay constituents. Part II provides a comprehensive description of the applications of clays and their derivatives in various industries, while Part III describes the role of clays in the environment; the pollution caused by clay minerals; and the application of clays in order to prevent environmental hazards. A principal feature of the book is its explanation of how the structure and composition of particular clay types facilitate their specific industrial or environmental applications, thus describing the interrelationship between three widely varying aspects of clay. A number of thought-provoking questions are raised at the end of the work in order to leave readers with a better insight in this regard.
Author: Richard W. Lee Publisher: ISBN: Category : Computerized typesetting Languages : en Pages : 136
Book Description
A Symposium on Electronic Composition in Printing was held at the Gaithersburg Laboratories of the National Bureau of Standards.The symposium was a state-of-the-art review of a rapidly advancing field of computer application with great potentialities for increased efficiency and savings in the Federal Government.(Author).
Author: Barrie D. Dunn Publisher: Springer ISBN: 3319233629 Category : Technology & Engineering Languages : en Pages : 677
Book Description
The objective of this book is to assist scientists and engineers select the ideal material or manufacturing process for particular applications; these could cover a wide range of fields, from light-weight structures to electronic hardware. The book will help in problem solving as it also presents more than 100 case studies and failure investigations from the space sector that can, by analogy, be applied to other industries. Difficult-to-find material data is included for reference. The sciences of metallic (primarily) and organic materials presented throughout the book demonstrate how they can be applied as an integral part of spacecraft product assurance schemes, which involve quality, material and processes evaluations, and the selection of mechanical and component parts. In this successor edition, which has been revised and updated, engineering problems associated with critical spacecraft hardware and the space environment are highlighted by over 500 illustrations including micrographs and fractographs. Space hardware captured by astronauts and returned to Earth from long durations in space are examined. Information detailed in the Handbook is applicable to general terrestrial applications including consumer electronics as well as high reliability systems associated with aeronautics, medical equipment and ground transportation. This Handbook is also directed to those involved in maximizing the relia bility of new materials and processes for space technology and space engineering. It will be invaluable to engineers concerned with the construction of advanced structures or mechanical and electronic sub-systems.
Author: David R. Lide Publisher: CRC Press ISBN: 9780849312472 Category : Science Languages : en Pages : 402
Book Description
Established by Congress in 1901, the National Bureau of Standards (NBS), now the National Institute of Standards and Technology (NIST), has a long and distinguished history as the custodian and disseminator of the United States' standards of physical measurement. Having reached its centennial anniversary, the NBS/NIST reflects on and celebrates its first century with this book describing some of its seminal contributions to science and technology. Within these pages are 102 vignettes that describe some of the Institute's classic publications. Each vignette relates the context in which the publication appeared, its impact on science, technology, and the general public, and brief details about the lives and work of the authors. The groundbreaking works depicted include: A breakthrough paper on laser-cooling of atoms below the Doppler limit, which led to the award of the 1997 Nobel Prize for Physics to William D. Phillips The official report on the development of the radio proximity fuse, one of the most important new weapons of World War II The 1932 paper reporting the discovery of deuterium in experiments that led to Harold Urey's1934 Nobel Prize for Chemistry A review of the development of the SEAC, the first digital computer to employ stored programs and the first to process images in digital form The first paper demonstrating that parity is not conserved in nuclear physics, a result that shattered a fundamental concept of theoretical physics and led to a Nobel Prize for T. D. Lee and C. Y. Yang "Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor," a 1995 paper that has already opened vast new areas of research A landmark contribution to the field of protein crystallography by Wlodawer and coworkers on the use of joint x-ray and neutron diffraction to determine the structure of proteins
Author: Geneviève Glastre
Author: Geneviève Glastre
Author: Pascal Letourneau
Author: Michael J. Kelly
Author: Michel Andre Aegerter
Author: United States. National Bureau of Standards
Author: Swapna Mukherjee
Author: 
Author: Richard W. Lee
Author: Barrie D. Dunn
Author: David R. Lide