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Rapid Thermal Annealing of Amorphous Silicon Thin Films Grown by Electron Cyclotron Resonance Chemical Vapor Deposition

Published online by Cambridge University Press:  01 February 2011

Pei-Yi Lin ,
Ping-Jung Wu  and
I-Chen Chen
Pei-Yi Lin
Affiliation:
Prakte@gmail.com, National Central University, Jhongli City, Taiwan, Province of China
Ping-Jung Wu
Affiliation:
buckmanp2003@gmail.com, National Central University, Jhongli City, Taiwan, Province of China
I-Chen Chen
Affiliation:
edinchen@gmail.com, National Central University, Jhongli City, Taiwan, Province of China
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Abstract

Hydrogenated amorphous silicon (a-Si:H) thin films were deposited on pre-oxidized Si wafers by electron cyclotron resonance chemical vapor deposition (ECRCVD). The rapid thermal annealing (RTA) treatments were applied to the as-grown samples in nitrogen atmosphere, and the temperature range for the RTA process is from 450 to 950 °C. The crystallization and grain growth behaviors of the annealed films were investigated by Raman spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The onset temperature for the crystallization and grain growth is around 625 ∼ 650°C. The crystalline fraction of annealed a-Si:H films can reach ∼80%, and a grain size up to 17 nm could be obtained from the RTA treatment at 700 °C. We found that the crystallization continues when the grain growth has stopped.

Keywords

amorphousannealinggrain size
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1245: Symposium A – Amorphous and Polycrystalline Thin-Film Silicon Science and Technology-2010 , 2010 , 1245-A05-05
Copyright
Copyright © Materials Research Society 2010

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