In-Situ Studies of Metal on III-V Semiconductors

In-Situ Studies of Metal on III-V Semiconductors

Author:

Publisher:

Published: 1997

Total Pages: 8

ISBN-13:

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Research has been performed using high resolution electron microscopy under ultra-high vacuum (UHV) conditions on a number of metal semiconductor systems. The new system combining classical surface characterization techniques and growth has been installed on a UHV microscope and fully tested. The growth at the monolayer level of Au and Ay on Si (001) has been studied combining XPS and electron microscopy. Studies of the growth of Au on both air introduced and Ga-rich GaAs (001) substrates have been performed. A variety of new methodologies and techniques have been developed, most notably atomic scale imaging of surfaces at a higher level than previously possible and new methods of determining surface structures just from electron (or x-ray) diffraction data. Electron microscopy studies of MoS2 lubricant films are also described.


A Review: Ultrahigh-Vacuum Technology for Electron Microscopes

A Review: Ultrahigh-Vacuum Technology for Electron Microscopes

Author: Nagamitsu Yoshimura

Publisher: Academic Press

Published: 2020-02-15

Total Pages: 575

ISBN-13: 012819703X

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A Review: Ultrahigh-Vacuum Technology for Electron Microscopes provides information on the fundamentals of ultra-high vacuum systems. It covers the very subtle process that can help increase pressure inside the microscope (or inside any other ultra-high vacuum system) and the different behavior of the molecules contributing to this kind of process. Prof Yoshimura’s book offers detailed information on electron microscope components, as well as UHV technology. This book is an ideal resource for industrial microscopists, engineers and scientists responsible for the design, operation and maintenance of electron microscopes. In addition, engineering students or engineers working with electron microscopes will find it useful. Teaches how to incorporate diffusion pumps for UHV electron microscopy Presents the work of an author who brings a lifetime of experience working on vacuum technology and electron microscopes


Historical Evolution Toward Achieving Ultrahigh Vacuum in JEOL Electron Microscopes

Historical Evolution Toward Achieving Ultrahigh Vacuum in JEOL Electron Microscopes

Author: Nagamitsu Yoshimura

Publisher: Springer Science & Business Media

Published: 2013-09-12

Total Pages: 133

ISBN-13: 4431544488

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This book describes the developmental history of the vacuum system of the transmission electron microscope (TEM) at the Japan Electron Optics Laboratory (JEOL) from its inception to its use in today’s high-technology microscopes. The author and his colleagues were engaged in developing vacuum technology for electron microscopes (JEM series) at JEOL for many years. This volume presents a summary and explanation of their work and the technology that makes possible a clean ultrahigh vacuum. The typical users of the TEM are top-level researchers working at the frontiers of new materials or with new biological specimens. They often use the TEM under extremely severe conditions, with problems sometimes occurring in the vacuum system of the microscopes. JEOL engineers then must work as quickly as possible to improve the vacuum evacuation system so as to prevent the recurrence of such problems. Among the wealth of explanatory material in this book are examples of users’ reports of problems in the vacuum system of the JEM, such as the occurrence of a micro-discharge and the back-streaming of the diffusion pump (DP) oil vapor. This work is a valuable resource for researchers who use the transmission electron microscope and for engineers and scientists interested in its technology.


Evaluation of Advanced Semiconductor Materials by Electron Microscopy

Evaluation of Advanced Semiconductor Materials by Electron Microscopy

Author: David Cherns

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 413

ISBN-13: 1461305276

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The last few years have ~een rapid improvements in semiconductor growth techniques which have produced an expanding range of high quality heterostructures for new semiconductor devises. As the dimensions of such structures approach the nanometer level, it becomes increasingly important to characterise materials properties such as composition uniformity, strain, interface sharpness and roughness and the nature of defects, as well as their influence on electrical and optical properties. Much of this information is being obtained by electron microscopy and this is also an area of rapid progress. There have been advances for thin film studies across a wide range of techniques, including, for example, convergent beam electron diffraction, X-ray and electron energy loss microanalysis and high spatial resolution cathodoluminescence as well as by conventional and high resolution methods. Important develop ments have also occurred in the study of surfaces and film growth phenomena by both microscopy and diffraction techniques. With these developments in mind, an application was made to the NATO Science Committee in late summer 1987 to fund an Advanced Research Work shop to review the electron microscopy of advanced semiconductors. This was subsequently accepted for the 1988 programme and became the "NATO Advanced Research Workshop on the Evaluation of Advanced Semiconductor Materials by Electron Microscopy". The Workshop took place in the pleasant and intimate surroundings of Wills Hall, Bristol, UK, during the week 11-17 September 1988 and was attended by fifty-five participants from fourteen countries.


Surface and Interface Characterization by Electron Optical Methods

Surface and Interface Characterization by Electron Optical Methods

Author: Ugo Valdre

Publisher: Springer Science & Business Media

Published: 2013-03-09

Total Pages: 321

ISBN-13: 1461595371

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The importance of real space imaging and spatially-resolved spectroscopy in many of the most significant problems of surface and interface behaviour is almost self evident. To join the expertise of the tradi tional surface scientist with that of the electron microscopist has however been a slow and difficult process. In the past few years remarkable progress has been achieved, including the development of new techniques of scanning transmission and reflection imaging as well as low energy microscopy, all carried out in greatly improved vacuum conditions. Most astonishing of all has been the advent of the scanning tunneling electron microscope providing atomic resolution in a manner readily compatible with most surface science diagnostic procedures. The problem of beam damage, though often serious, is increasingly well understood so that we can assess the reliability and usefulness of the results which can now be obtained in catalysis studies and a wide range of surface science applications. These new developments and many others in more established surface techniques are all described in this book, based on lectures given at a NATO Advanced Study Institute held in Erice, Sicily, at Easter 1987. It is regretted that a few lectures on low energy electron diffraction and channeling effects could not be included. Fifteen lecturers from seven different Countries and 67 students from 23 Countries and a wide variety of backgrounds attended the school.


Transmission Electron Microscopy in Micro-nanoelectronics

Transmission Electron Microscopy in Micro-nanoelectronics

Author: Alain Claverie

Publisher: John Wiley & Sons

Published: 2013-01-29

Total Pages: 280

ISBN-13: 1118579054

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Today, the availability of bright and highly coherent electron sources and sensitive detectors has radically changed the type and quality of the information which can be obtained by transmission electron microscopy (TEM). TEMs are now present in large numbers not only in academia, but also in industrial research centers and fabs. This book presents in a simple and practical way the new quantitative techniques based on TEM which have recently been invented or developed to address most of the main challenging issues scientists and process engineers have to face to develop or optimize semiconductor layers and devices. Several of these techniques are based on electron holography; others take advantage of the possibility of focusing intense beams within nanoprobes. Strain measurements and mappings, dopant activation and segregation, interfacial reactions at the nanoscale, defect identification and specimen preparation by FIB are among the topics presented in this book. After a brief presentation of the underlying theory, each technique is illustrated through examples from the lab or fab.


Transmission Electron Microscopy of Semiconductor Nanostructures

Transmission Electron Microscopy of Semiconductor Nanostructures

Author: Andreas Rosenauer

Publisher: Springer

Published: 2003-07-03

Total Pages: 238

ISBN-13: 3540364072

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This book provides tools well suited for the quantitative investigation of semiconductor electron microscopy. These tools allow for the accurate determination of the composition of ternary semiconductor nanostructures with a spatial resolution at near atomic scales. The book focuses on new methods including strain state analysis as well as evaluation of the composition via the lattice fringe analysis (CELFA) technique. The basics of these procedures as well as their advantages, drawbacks and sources of error are all discussed. The techniques are applied to quantum wells and dots in order to give insight into kinetic growth effects such as segregation and migration. In the first part of the book the fundamentals of transmission electron microscopy are provided. These are needed for an understanding of the digital image analysis techniques described in the second part of the book. There the reader will find information on different methods of composition determination. The third part of the book focuses on applications such as composition determination in InGaAs Stranski--Krastanov quantum dots. Finally it is shown how an improvement in the precision of the composition evaluation can be obtained by combining CELFA with electron holography. This is demonstrated for an AlAs/GaAs superlattice.