Patent · US Active

Impedance matching apparatus

US8884520B2 · kind B2 · utility

5Cited by
1References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 9, 2012
Grant dateNov 11, 2014
Priority date
Expiry dateSep 20, 2032

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH05H2242/26
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

Provided is an impedance matching apparatus for matching impedance to a plasma load. The impedance matching apparatus includes a first frequency impedance matching circuit unit that transfers an output of a first frequency RF power source unit, operating at a first frequency, to the plasma load; and a second frequency impedance matching circuit unit that transfers an output of a second frequency RF power source unit, operating at a second frequency higher than the first frequency, to the plasma load. The first frequency impedance matching circuit unit includes a T-type matching circuit, and the second frequency impedance matching circuit unit includes a standard L-type matching circuit or Π-type matching circuit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.