Patent ID: 9536708
Date: 2017-01-03
CPC Classifications: H01J

Claim:
1. A plasma generating device comprising: at least one RF power supply configured to supply one or more RF signals; a plasma chamber providing a space where gas is injected to generate plasma; a first electromagnetic inducer at one portion of the plasma chamber, the first electromagnetic inducer configured to induce an electromagnetic field in the plasma chamber as one of the one or more RF signals is applied; a second electromagnetic inducer at another portion of the plasma chamber, the second electromagnetic inducer configured to induce an electromagnetic field in the plasma chamber as one of the one or more RF signals is applied; a first load connected to the first electromagnetic inducer; a second load connected to the second electromagnetic inducer; at least one of a measurement unit and a detection unit, the measurement unit configured to measure at least one of capacitance, inductance, and resistance of the first and second loads, the detection unit configured to detect the one or more RF signals applied to the first and second electromagnetic inducers; and a controller configured to respectively control a power supplied to the first electromagnetic inducer and a power supplied to the second electromagnetic inducer by adjusting at least one of an impedance of the first load and an impedance of the second load based on output from the at least one of the measurement unit and the detection unit.