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Variable Magnification Electron Holography for 2-D Mapping of Semiconductor Devices

Published online by Cambridge University Press:  14 March 2018

Y.Y. Wang
Affiliation:
IBM Microelectronic Division
M. Gribelyuk
Affiliation:
IBM Microelectronic Division
A. Domenicucci
Affiliation:
IBM Microelectronic Division
J. Bruley
Affiliation:
IBM Microelectronic Division
J. Gaudiello
Affiliation:
IBM Microelectronic Division
M. Kawasaki
Affiliation:
IBM Microelectronic Division JEOL USA

Extract

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The exit electron wave from transmission electron microscopy (TEM) specimens contains both amplitude and phase information. In routine TEM imaging, only amplitude information is recorded on the recording devices (film or CCD camera) and phase information of the electron wave function normally is canceled out.

In 1947, Dennis Gabor proposed off-axis electron holography, a method of interference imaging in which the phase and amplitude components of the electron beam are obtained to correct spherical aberration of the transmission electron microscope to improve spatial resolution. In that process, the electron beam is split into the two beams: the un-scattered electron beam (i.e. the reference wave) and the image beam (or object wave) diffracted by the specimen and exiting the bottom of the specimen surface.

Type
Research Article
Copyright
Copyright © Microscopy Society of America 2004

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