Patent ID: 9390893
Filing Date: 2016-07-12
CPC Classification: H01J,H03K,H03L,H05H

Claim Text:
1. A method comprising: receiving a clock signal from a clock source, the clock signal having two states including a first state and a second state; generating a pulsed signal from the clock signal, the pulsed signal having sub-states within the first state, the sub-states alternating with respect to each other at a frequency greater than a frequency of the states; providing the pulsed signal to control power of a first radio frequency (RF) signal that is generated by a first RF generator, the power controlled to be synchronous with the pulsed signal; supplying the first RF signal having the sub-states and having the second state to an impedance matching circuit connected to an electrode of a plasma chamber; and supplying from a second RF generator a second RF signal having the first state without the sub-states and having the second state to the impedance matching circuit that is connected to the electrode.