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Submitted on: 08 December 2006.
Revised on: 02 January 2007.
Accepted on: 01 February 2007.
___________________Journal of Semiconductor Technology and Science
Submitted on: 08 January 2011.
Revised on: 15 February 2011.
Accepted on: 14 April 2011.
___________________Journal of Semiconductor Technology and Science
Submitted on: 14 November 2007.
Revised on: 24 December 2007.
Accepted on: 09 February 2008.
___________________Journal of Semiconductor Technology and Science
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