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http://reply.papertrans.cn/2/193/19239/19239-32.png
Submitted on: 10 June 1999.
Revised on: 09 August 1999.
Accepted on: 07 September 1999.
___________________Journal of Semiconductor Technology and Science
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Submitted on: 11 February 2002.
Revised on: 14 April 2002.
Accepted on: 11 June 2002.
___________________Journal of Semiconductor Technology and Science
Submitted on: 04 July 2009.
Revised on: 30 September 2009.
Accepted on: 16 November 2009.
___________________Journal of Semiconductor Technology and Science