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Journal of Applied Physics / Volume 106 / Issue 7 / PLASMAS AND ELECTRICAL DISCHARGES

J. Appl. Phys. 106, 073303 (2009); http://dx.doi.org/10.1063/1.3225690 (8 pages)

Accurate control of ion bombardment in remote plasmas using pulse-shaped biasing

P. Kudlacek, R. F. Rumphorst, and M. C. M. van de Sanden

Department of Applied Physics, Plasma and Material Processing Group, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands

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(Received 29 June 2009; accepted 17 August 2009; published online 7 October 2009)

This paper deals with a pulsed biasing technique employed to a downstream expanding thermal plasma. Two pulsed biasing approaches are presented: asymmetric rectangular pulses and modulated pulses with a linear voltage slope during the pulse, and their applicability is discussed on the basis of the intrinsic capacitance of the processed substrate-layer system. The substrate voltage and current waveforms are measured, and the relation to the obtained ion energy distributions is discussed. Accurate control of the ion bombardment is demonstrated for both aforementioned cases, and the cause of broadening of the peaks in the ion energy spectra is determined as well. Moreover, several methods to determine the modulated pulse duration, such that the sloping voltage exactly compensates for the drop of the substrate sheath potential due to charging, are presented and their accuracy is discussed.

© 2009 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL DETAILS
  3. RESULTS AND DISCUSSION
    1. Substrate voltage and current waveforms
    2. Control of IED: Conductive substrate
      1. Broadening of IED
    3. Control of IED: Dielectric substrate
      1. Estimation of the pulse duration
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

plasma deposition

PACS

  • 52.77.Dq

    Plasma-based ion implantation and deposition

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3225690

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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