Feng-Bin Yeh 2006 J. Phys. D: Appl. Phys. 39 4818 doi:10.1088/0022-3727/39/22/012
Feng-Bin Yeh
Show affiliationsThe problem of heating a film on a semi-infinite substrate with repetitive high negative bias voltage pulses in contact with a plasma is solved by using the Laplace integral transform technique. The plasma is composed of a collisionless presheath and sheath on an electrically negative film, which partially reflects and secondarily emits ions and electrons. The heating rate of the film attributable to the plasma, the presheath and the sheath, is determined by kinetic analysis. This work proposes a semi-analytical model to calculate the temperature and temperature gradient evolutions inside the film and substrate and provides quantitative results applicable to the control of the temperature evolution. The predicted surface temperature of the film as a function of time is found to agree well with the experimental data. A minimum exits in the temperature gradient profile at a certain depth below the surface. As the heating period progresses, the point of minimum temperature gradient moves towards the solid bulk of the film. The temperature evolution rises periodically and the heat flux evolution oscillates near the vicinity of the surface of the film. In a region beyond a certain depth, the above-mentioned phenomena disappear, and the temperature and temperature gradient evolutions rise monotonically. The effects of the dimensionless pulse duty cycle and the bias voltage on the temperature and temperature gradient profiles could be demonstrated. The temperature at the front surface of the film increases linearly with the pulse parameters. The results show that the temperature and temperature gradient profiles inside the film and substrate are strongly dependent on the pulse parameters.
52.77.Dq Plasma-based ion implantation and deposition
Issue 22 (21 November 2006)
Received 11 July 2006, in final form 15 September 2006
Published 3 November 2006
Feng-Bin Yeh 2006 J. Phys. D: Appl. Phys. 39 4818
Jan de Gier 2001 J. Phys. A: Math. Gen. 34 3707
Liang Wang et al 2004 J. Phys. A: Math. Gen. 37 10699
Antonio Castañeda and Vladislav V Kravchenko 2005 J. Phys. A: Math. Gen. 38 9207
Charles D. Dermer et al 2007 ApJ 664 L67
Rémi Carles et al 2008 Nonlinearity 21 2569
Christian Röver et al 2006 Class. Quantum Grav. 23 4895
Federico Finkel et al 1999 J. Phys. A: Math. Gen. 32 6821
Erik Olsson and Kourosh Tatar 2006 Meas. Sci. Technol. 17 2843
B J Powell et al 2003 J. Phys.: Condens. Matter 15 L235