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Title: ECR apparatus with magnetic coil for plasma refractive index control

Abstract

The present invention describes a technique to control the radial profile of microwave power in an ECR plasma discharge. In order to provide for a uniform plasma density to a specimen, uniform energy absorption by the plasma is desired. By controlling the radial profile of the microwave power transmitted through the microwave window of a reactor, the profile of the transmitted energy to the plasma can be controlled in order to have uniform energy absorption by the plasma. An advantage of controlling the profile using the window transmission characteristics is that variations to the radial profile of microwave power can be made without changing the microwave coupler or reactor design.

Inventors:
 [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
869262
Patent Number(s):
5306985
Assignee:
Sematech, Inc. (Austin, TX)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16B - DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ecr; apparatus; magnetic; coil; plasma; refractive; index; control; describes; technique; radial; profile; microwave; power; discharge; provide; uniform; density; specimen; energy; absorption; desired; controlling; transmitted; window; reactor; controlled; advantage; transmission; characteristics; variations; changing; coupler; design; reactor design; radial profile; plasma density; ecr plasma; microwave window; magnetic coil; transmission characteristics; uniform energy; uniform plasma; plasma discharge; energy absorption; refractive index; microwave power; wave coupler; power transmitted; microwave coupler; /315/118/204/

Citation Formats

Berry, Lee A. ECR apparatus with magnetic coil for plasma refractive index control. United States: N. p., 1994. Web.
Berry, Lee A. ECR apparatus with magnetic coil for plasma refractive index control. United States.
Berry, Lee A. Sat . "ECR apparatus with magnetic coil for plasma refractive index control". United States. https://www.osti.gov/servlets/purl/869262.
@article{osti_869262,
title = {ECR apparatus with magnetic coil for plasma refractive index control},
author = {Berry, Lee A},
abstractNote = {The present invention describes a technique to control the radial profile of microwave power in an ECR plasma discharge. In order to provide for a uniform plasma density to a specimen, uniform energy absorption by the plasma is desired. By controlling the radial profile of the microwave power transmitted through the microwave window of a reactor, the profile of the transmitted energy to the plasma can be controlled in order to have uniform energy absorption by the plasma. An advantage of controlling the profile using the window transmission characteristics is that variations to the radial profile of microwave power can be made without changing the microwave coupler or reactor design.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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Behavior of Ar plasmas formed in a mirror field electron cyclotron resonance microwave ion source
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