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Proceedings Paper

Transient laser-induced surface deformation of Si-based multilayer structures
Author(s): Chun Chi Ma; Woei-Yun Ho; Rodger M. Walser; Michael F. Becker
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Paper Abstract

Transient thermal expansion, heat generation and conduction, nonlinear laser heating, and subsequent melting behaviors of polysilicon/oxide/silicon wafer `sandwich' structures have been investigated via a laser pump-probe technique. Laser processing, damage, and characterization of bulk semiconductor materials has been extensively investigated. However, less is known about the mechanism of laser-induced damage for multilayer structures such as CCD imaging arrays. In order to develop damage resistant sensors and better isolation for sensors used in laser environments, it is necessary to understand the processes contributing to the laser hardness and damage of these sensors. We designed experiments to measure the transient thermomechanical and laser-damage characteristics of multilayer systems that resemble CCD devices. The final objective was to gain some insight into the dominant mechanisms responsible for laser-induced degradation in CCD imaging arrays and devices of similar structures. Positive identification of a precursor event signaling the onset of catastrophic damage and identification of the weakest link elements on the sensor array will be essential for making design or processing modifications to improve hardness. It is our goal in this paper to contribute to the above objectives by describing investigations of laser-induced damage to silicon-based multilayer structures.

Paper Details

Date Published: 7 December 1993
PDF: 14 pages
Proc. SPIE 2021, Growth and Characterization of Materials for Infrared Detectors, (7 December 1993); doi: 10.1117/12.164945
Show Author Affiliations
Chun Chi Ma, Univ. of Texas/Austin (United States)
Woei-Yun Ho, Univ. of Texas/Austin (United States)
Rodger M. Walser, Univ. of Texas/Austin (United States)
Michael F. Becker, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 2021:
Growth and Characterization of Materials for Infrared Detectors
Randolph E. Longshore; Jan W. Baars, Editor(s)

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