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Induction plasma source

  • US 5,346,578 A
  • Filed: 11/04/1992
  • Issued: 09/13/1994
  • Est. Priority Date: 11/04/1992
  • Status: Expired due to Term
First Claim
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1. A plasma process apparatus for integrated circuit fabrication having a chamber and a platen for supporting on a surface thereof a substrate in the chamber, comprising:

  • a hemispherically shaped induction coil having multiple helical windings, a base winding thereof being generally parallel to and coplanar with the support surface of the platen, and each of the other windings being generally parallel to the support surface of the platen, the chamber being disposed inside the induction coil;

    a low frequency radio frequency power source coupled to the induction coil; and

    a bias power source coupled to the platen for biasing the substrate.

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