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Proceedings Paper

Investigations on CMOS photodiodes using scanning electron microscopy with electron beam induced current measurements
Author(s): A. Kraxner; F. Roger; B. Loeffler; M. Faccinelli; S. Kirnstoetter; R. Minixhofer; P. Hadley
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Paper Abstract

In this work the characterization of CMOS diodes with Electron Beam Induced Current (EBIC) measurements in a Scanning Electron Microscope (SEM) are presented. Three-dimensional Technology Computer Aided Design (TCAD) simulations of the EBIC measurement were performed for the first time to help interpret the experimental results. The TCAD simulations provide direct access to the spatial distribution of physical quantities (like mobility, lifetime etc.) which are very difficult to obtain experimentally. For the calibration of the simulation to the experiments, special designs of vertical p-n diodes were fabricated. These structures were investigated with respect to doping concentration, beam energy, and biasing. A strong influence of the surface preparation on the measurements and the extracted diffusion lengths are shown.

Paper Details

Date Published: 16 September 2014
PDF: 12 pages
Proc. SPIE 9236, Scanning Microscopies 2014, 923607 (16 September 2014); doi: 10.1117/12.2066124
Show Author Affiliations
A. Kraxner, ams AG (Austria)
Technische Univ. Graz (Austria)
F. Roger, ams AG (Austria)
B. Loeffler, ams AG (Austria)
M. Faccinelli, Technische Univ. Graz (Austria)
S. Kirnstoetter, Technische Univ. Graz (Austria)
R. Minixhofer, ams AG (Austria)
P. Hadley, Technische Univ. Graz (Austria)

Published in SPIE Proceedings Vol. 9236:
Scanning Microscopies 2014
Michael T. Postek; Dale E. Newbury; S. Frank Platek; Tim K. Maugel, Editor(s)

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