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Title: Mitigating dust particle contamination in an afterglow plasma by controlled lifting with a DC electric field

Journal Article · · Journal of Physics. D, Applied Physics

Abstract Particle contamination due to plasma processing motivates the design of a method of electrically lifting particles in a time interval after a plasma’s power is turned off. Small solid dust particles have electric charges that are not frozen until a late stage of the plasma afterglow. Beyond that time, before they fall to a surface below and cause defects, particles can be lifted in a controlled manner by applying an appropriate direct-current (DC) electric field, as we demonstrate experimentally. A few milliseconds after an argon plasma’s capacitively coupled radio-frequency power is switched off, a vertical DC electric field is applied. Thereafter, video imaging shows that the falling of the particles is slowed or stopped altogether, depending on the magnitude of the upward electric force.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0014566; 1672641; 1689926
OSTI ID:
2229166
Alternate ID(s):
OSTI ID: 2222941
Journal Information:
Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Vol. 57 Journal Issue: 10; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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