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Plasma processing method and apparatus

  • US 6,158,383 A
  • Filed: 04/02/1999
  • Issued: 12/12/2000
  • Est. Priority Date: 02/20/1996
  • Status: Expired due to Fees
First Claim
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1. A plasma processing apparatus comprising:

  • a microwave source;

    a microwave waveguide for transmitting microwaves radiated from said microwave source;

    a ring-shaped cavity resonator for resonating the microwaves transmitted by said microwave waveguide;

    a processing chamber including a sample stand for placing thereon a substrate to be treated; and

    microwave electromagnetic field radiating means for radiating a microwave electromagnetic field from said ring-shaped cavity resonator through a microwave introduction window into said precessing chamber, to generate a ring-shaped plasma in a region opposed to said substrate.

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