Patent ID: 11881380
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A plasma processing apparatus, comprising:
a chamber having a dielectric window;
a coil placed outside the chamber so as to face the dielectric window;
a Faraday shield electrode placed on a side of the chamber of the coil with space existing between the coil and the Faraday shield electrode;
a first power source for supplying a high-frequency power of a first frequency to the coil;
a second power source for supplying a high-frequency power of a second frequency to the Faraday shield electrode, the second frequency being different from the first frequency;
a first matcher for matching a first impedance between the first power source and the coil;
a second matcher for matching a first impedance between the second power source and the Faraday shield electrode; and
a first frequency attenuation filter configured to allow transmission of the high-frequency power of the second frequency and inhibit transmission of the high-frequency power of the first frequency; and
a second frequency attenuation filter configured to allow transmission of the high-frequency power of the first frequency and inhibit transmission of the high-frequency power of the second frequency, wherein
the first power source is connected to the coil via the second frequency attenuation filter so as to prevent the high-frequency power of the second frequency having entered the coil from the second power source via the space to enter into the first power source, and
the second power source is connected to the Faraday shield electrode via the first frequency attenuation filter so as to prevent the high-frequency power of the first frequency having entered the Faraday shield electrode from the first power source via the space to enter into the second power source.