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Master's Dissertation
DOI
https://doi.org/10.11606/D.43.2001.tde-27052021-183842
Document
Author
Full name
Tatiana Ferrari D'Addio
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2001
Supervisor
Committee
Fantini, Marcia Carvalho de Abreu (President)
Marques, Francisco das Chagas
Salvadori, Maria Cecilia Barbosa da Silveira
Title in Portuguese
Cristalização em filmes de a-'Si IND. 1-X''C IND. X':H.
Keywords in Portuguese
CRISTALIZAÇÃO
FÍSICA
Abstract in Portuguese
Neste trabalho, analisamos as propriedades químicas, morfológicas e estruturais de filmes finos de carbeto de silício amorfo hidrogenado (a-'Si IND. 1-X' 'C IND. X':H), crescidos pelo método de deposição química a vapor assistida por plasma (PECVD), sob o efeito de pós-tratamentos térmicos. Todas as amostras foram depositadas no regime de "plasm" faminto" por silano, utilizando como gases reativos o silano e o metano. Filmes crescidos nessas condições apresentam estrutura de ordem local similar à de carbeto de silício cristalino. Foram analisadas e correlacionadas as propriedades de filmes com diferentes composições, depositadas sobre diferentes substratos. Nossos resultados não apenas são consistentes com dados da literatura, como também indicam que filmes estequiométricos são cristalizados a uma temperatura inferior às reportadas, com indícios de epitaxia do material sobre substrato de Si[100]. Os filmes não estequiométricos apresentam uma formação maisintensa de óxidos e não apresentam evidências de cristalização durante os processos de tratamento térmico.
Title in English
Crystallization in a-'Si IND. 1-X''C IND. X':H films.
Keywords in English
CRYSTALLIZATION
PHYSICS
Abstract in English
In this work we have studied the chemical, morphological and structural properties of hydrogenated amorphous silicon carbide(a-'Si IND. 1-X''C IND. X':H) thin films, grown by plasma enhanced chemical vapor deposition (PECVD), under annealing. All samples were deposited under "starving plasma" regime, from silane and metane mixtures. FIlms deposited under these conditions present short range order similar to crystalline silicon carbide. The properties of films having different carbon content, deposited on different substrates, were analyzed and correlated. The results are not only in agreement with previous published data, but also indicate that stoichiometric films are crystallized under lower temperature than those previously reported, besides indications of epitaxial growth over single-crystalline Si [100] substrate. Non-stoichiometric films present higher concentration of oxides and no evidence of crystallization under annealing.
 
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2001DAddio.pdf (60.13 Mbytes)
Publishing Date
2021-05-31
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • PRADO, R. J., et al. Annealing effects of highly homogeneous a-Si1−xCx:H [doi:10.1016/s0022-3093(03)00526-x]. Journal of Non-Crystalline Solids [online], 2003, vol. 330, nº 1-3, p. 196-215.
All rights of the thesis/dissertation are from the authors
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