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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
Collisionless bounce resonance heating in dual-frequency capacitively coupled plasmas
Yong-Xin Liu1, Quan-Zhi Zhang, Wei Jiang
1School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, China.
Physical Review Letters
|August 27, 2011
Summary
Collisionless electron bounce resonance heating (BRH) was experimentally observed in low-pressure dual-frequency plasmas. This heating mechanism generates high-energy electrons through resonant interactions with plasma sheaths.
Area of Science:
- Plasma Physics
- Nonlinear Phenomena
- Electromagnetic Wave Interactions
Background:
- Capacitively coupled plasmas (CCPs) are crucial in semiconductor manufacturing.
- Understanding electron heating mechanisms is key to controlling plasma properties.
- Collisionless heating processes, like bounce resonance heating (BRH), are important at low pressures.
Purpose of the Study:
- To experimentally demonstrate collisionless electron bounce resonance heating (BRH) in low-pressure dual-frequency CCPs.
- To investigate the influence of BRH on plasma characteristics.
- To analyze the role of dual-frequency excitation in BRH.
Main Methods:
- Experimental investigation using low-pressure dual-frequency capacitively coupled plasmas.
- Utilizing a floating double probe for plasma parameter measurements.
- Employing optical emission spectroscopy (OES) for plasma diagnostics.
Main Results:
- Experimental evidence for collisionless electron bounce resonance heating (BRH) was obtained.
- BRH was found to generate high-energy beamlike electrons.
- The effect of BRH on plasma density and optical emission was demonstrated, particularly in dual-frequency discharges.
Conclusions:
- Collisionless electron bounce resonance heating (BRH) is confirmed in low-pressure dual-frequency CCPs.
- BRH significantly impacts plasma properties, including density and light emission.
- Dual-frequency excitation plays a critical role in enabling and enhancing BRH.
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