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Laser Dehydrogenation of PECVD Amorphous Silicon

Published online by Cambridge University Press:  01 January 1993

Ping Mei ,
J.B. Boyce ,
M. Hack ,
R.A. Lujan ,
R.I. Johnson ,
G.B. Anderson ,
D.K. Fork ,
S.E. Ready  and
D.L. Smith
Ping Mei
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
J.B. Boyce
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
M. Hack
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
R.A. Lujan
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
R.I. Johnson
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
G.B. Anderson
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
D.K. Fork
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
S.E. Ready
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
D.L. Smith
Affiliation:
XEROX PALO ALTO RESEARCH CENTER,3333 Coyote Hill Road,, Palo Alto, CA 94304
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Abstract

A low temperature process for laser dehydrogenation and crystallization of hydrogenated amorphous silicon has been studied. The key feature of this process is the removal of hydrogen from the amorphous silicon thin films while crystallizing the films at the same time. Studies of transient phenomena, hydrogen loss, and crystallinity, using transient reflectivity analyses, transmission electron microscopy and quadrupole mass spectrometry, find that hydrogen out-diffusion depends strongly on film structure and the melt duration controlled by the laser energy density. Utilizing this process, for which the maximum temperature is 350 °C, both high quality polycrystalline and amorphous silicon TFT's have been fabricated on the same Corning 7059 glass substrate.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 297: Symposium A – Amorphous Silicon Technology - 1993 , 1993 , 151
Copyright
Copyright © Materials Research Society 1993

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References

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