Ion distribution functions in inductively coupled radio frequency discharges in argon{endash}chlorine mixtures
- Laser, Optics and Remote Sensing Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-1423 (United States)
- Advanced Silicon Technology Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-1423 (United States)
- Applied Physics International, Inc., Albuquerque, New Mexico 87110 (United States)
We report on measurements of positive ion energies, current densities, and angular distributions at the grounded electrode of inductively coupled discharges in mixtures of argon and chlorine. We also report on ion species and Langmuir probe measurements for these discharges. The inductive drive in our gaseous electronics conference reference cell produced high plasma densities (10{sup 11}{endash}10{sup 12}/cm{sup 3}) and stable plasma potentials. As a result, ion energy distributions consisted of a single peak well separated from zero energy. At pressures of 2.5{endash}20 mTorr and constant rf power, the addition of Cl{sub 2} to an Ar discharge lowered ion current densities, reduced ion energies, and reduced the width of the ion energy distributions. Half-widths of the ion angular distributions ranged from 4.5{degree} to 8.5{degree} with the distributions broadening with increases in pressure or rf power. The addition of Cl{sub 2} to Ar discharges made the angular distributions less sensitive to total pressure. Cl{sup +} replaced Ar{sup +} as the dominant ionized species when small amounts of chlorine were added to Ar discharges. {copyright} {ital 1997 American Vacuum Society.}
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 552991
- Journal Information:
- Journal of Vacuum Science and Technology, A, Vol. 15, Issue 6; Other Information: PBD: Nov 1997
- Country of Publication:
- United States
- Language:
- English
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