Impedance matching circuit for operation with a kilohertz RF generator and a megahertz RF generator to control plasma processes
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United States of America Patent
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Mar 14, 2017
Issued Date -
N/A
app pub date -
Mar 2, 2015
filing date -
Mar 2, 2015
priority date (Note) -
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Abstract
An impedance matching circuit (IMC) is described. The impedance matching circuit includes a first circuit. The first circuit has an input coupled to a kilohertz (kHz) radio frequency (RF) generator. The IMC includes a second circuit. The second circuit has an input coupled to a low frequency megahertz (MHz) RF generator. The IMC includes a third circuit. The third circuit has an input coupled to a high frequency MHz RF generator. The IMC includes an output of the first, second, and third circuits coupled to an input of an RF transmission line. The first circuit and the second circuit provide isolation between a kHz RF signal sent through the first circuit and a low frequency MHz RF signal sent through the second circuit.
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