Investigation of capacitively coupled argon plasma driven at various frequencies and validation of surface waves excitation

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Abstract

The influence of excitation frequency (13.56-96 MHz) on the characteristics of capacitively coupled argon plasma is investigated by means of Langmuir probe and a high-voltage probe. Measurements are performed in argon pressure of 40 and 60 mTorr at a fixed discharge voltage Vpp=200 V. The measured electron energy distribution function EEPFs are a bi-Maxwellian type irrespective of the driving frequency and gas pressure. The electron density and temperatures show peak over frequency range of 54-72 MHz, beyond which it decreases. The non-monotonic dependences of plasma parameters with driving frequency were interpreted in terms of excited surface wave excited at the powered electrode.

Original languageEnglish
Pages (from-to)297-302
Number of pages6
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume377
Issue number3-4
DOIs
StatePublished - 3 Jan 2013

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • Capacitively coupled plasma
  • Electron energy distribution function
  • Surface wave plasma
  • Very high frequency

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