Removel of material by using electron beam and electrical field.
ELECTRON BEAM MACHINING :
A high velocity stream of electrons is focused on the workpiece surface to remove material by melting and vaporization
Electron beam gun accelerates a stream of electrons to 3/4 c and focused through an electromagnetic lens
Kinetic energy of beam converted to thermal energy of extremely high density, melting or vaporizing material in a very localized area
EBM must be carried out in a vacuum
MATERIAL PROCESSING BY ELECTRON BEAM:
High in ....etc

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Abstract

Field emission (FE) (also known as field electron emission and electron field emission) is emission of electrons induced by an electrostatic field. The most common context is field emission from a solid surface into vacuum. However, field emission can take place from solid or liquid surfaces, into vacuum, air, a fluid, or any non-conducting or weakly conducting dielectric. The field-induced promotion of electrons from the valence to conduction band of semiconductors (the Zener effect) can also be regarded as a form of field emission ....etc

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A surface-conduction electron-emitter display (SED) is a flat panel color television technology currently being developed by a number of companies.MAny electron emitters which are nanoscopic-scale are used for energizing the colored phosphors and produce an image. Thus a SED contains a matrix of tiny cathode ray tubes and may of them forming red-green-blue (RGB) pixels. Its advantages include: high contrast ratios, wide viewing angles and very fast response times, and also the power and packing advantages of LCD are also there.

Descrip ....etc

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Abstract


A multidisciplinary team of end users and suppliers has collaborated to develop a novel yet broadly enabling process for the design, fabrication and assembly of Micro-Opto-Electro-Mechanical Systems (MOEMS). A key goal is to overcome the shortcomings of the polysilicon layer used for fabricating optical components in a conventional surface micromachining process. These shortcomings include the controllability and uniformity of material stress that is a major cause of curvature and deformation in released microstructures. The appr ....etc

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to get information about the topic Surface-Conduction Electron-Emitter Display full report ,ppt and related topic refer the page link bellow
http://seminarsprojects.net/Thread-surface-conduction-electron-emitter-display-sed--11783

http://seminarsprojects.net/Thread-surface-conduction-electron-emitter-display-sed

http://seminarsprojects.net/Thread-surface-conduction-electron-emitter-display

http://seminarsprojects.net/Thread-surface-conduction-electron-emitter-display-sed--11783?page=2

http://seminarsprojects.net/Thread-surface-con ....etc

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OUTLINE
What are Transistors
What is a SET
How do SETs differ from the Conventional Transistors
Operation of SETs
Application of SETs
What is a Transistor
A transistor is a solid state semiconductor device which can be used for numerous purposes including signal modulation, signal amplification, voltage stabilization, and many other applications.

Transistors act like a variable valve which, based on its input current (BJT) or input voltage (FET), allow a precise amount of current to flow through it ....etc

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Surface conduction Electron emitter Display

The SED technology has been developing since 1987. The flat panel display technology that employs surface conduction electron emitters for every individual display pixel can be referred to as the Surface-conduction Electron-emitter Display (SED). Though the technology differs, the basic theory that the emitted electrons can excite a phosphor coating on the display panel seems to be the bottom line for both the SED display technology and the traditional cathode ray tube (CRT) t ....etc

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top down methods of nanotechnology i need description about this lithographic techniques ....etc

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ABSTRACT
This paper describes the design and implementation of a Three Phase Power Converter (AC/DC/AC) as a fourth year group project for the Power Electronics and Drives B subject at Victoria University. The system implemented converts a three phase input voltage of 400 Vrms at a power rating of 500 W to DC by using a three phase diode bridge rectifier, and a Capacitive filter which assists in stabilising the output DC voltage produced. After that, the system provides the gate drive signal to a three phase pulse width modulated (PWM) ....etc

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CONDUCTIVITY ,FERMI LEVEL ,
MEAN FREE PATH &
RELAXATION TIME
FOR TYPICAL MONO-VALENT METALS
IS SHOWN IN TABLE

The conductivity may be obtained experimentally .
Further we can get by using eqn given below
= ( n*Qe2 * )/me --(1)
but obtained may not be accurate but we will get an idea of magnitude of . In a monovalent metal no of free e- /m3 is equals the no of atoms /m3 . From table we find that relaxation time T is of the order of 10-14 sec .Thus we can say that T is extremely small f ....etc

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