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Proceedings Paper

Progress In Two And Three Terminal Amorphous Silicon Switching Devices For Matrix Addressed LeDs
Author(s): Z. Yaniv; V. Cannella; A. Lien; J. McGill; W. den Boer
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Paper Abstract

The use of a-Si alloy thin film devices to serve as pixel switching elements in active matrix addressed liquid crystal displays is very attractive. The technology exists to produce uniform high quality a-Si alloy materials over large areas very efficiently and economically. Even though the highest mobility achieved in a-Si TFTs is 1 cm2/V-sec, the currents and speed available with 10-20 μm channel lengths is more than adequate for switching LCD pixels, and the low off-current levels are ideal for holding pixel charge. To date, must of the research and development effort on active matrix LCDs is concentrated on a-Si TFTs. The success of TFT based displays for large area flat panel displays has been limited so far, mainly due to the difficulty of obtaining a high quality gate dielectric by plasma deposition and due to the presence of crossing conductors on the same substrate. Both of these factors increase the probability of defects in the display. When a two terminal sandwich device is used, on the other hand, no gate dielectric is required, and crossing lines are unnecessary, hence a higher yield can be expected.

Paper Details

Date Published: 12 March 1986
PDF: 9 pages
Proc. SPIE 0617, Amorphous Semiconductors for Microelectronics, (12 March 1986); doi: 10.1117/12.961068
Show Author Affiliations
Z. Yaniv, Ovonic Display Systems, Inc. (United States)
V. Cannella, Ovonic Display Systems, Inc. (United States)
A. Lien, Ovonic Display Systems, Inc. (United States)
J. McGill, Ovonic Display Systems, Inc. (United States)
W. den Boer, Ovonic Display Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 0617:
Amorphous Semiconductors for Microelectronics
David Adler, Editor(s)

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