Sub-pulsing during a state
First Claim
Patent Images
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for achieving sub-pulsing during a state is described. The method includes receiving a clock signal from a clock source, the clock signal having two states and generating a pulsed signal from the clock signal. The pulsed signal has sub-states within one of the states. The sub-states alternate with respect to each other at a frequency greater than a frequency of the states. The method includes providing the pulsed signal to control power of a radio frequency (RF) signal that is generated by an RF generator. The power is controlled to be synchronous with the pulsed signal.
164 Citations
19 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method comprising:
-
generating, by a digital signal processor of a first radio frequency (RF) generator, a pulsed signal having sub-states within a first state of a plurality of states, the sub-states alternating with respect to each other at a frequency greater than a frequency of the states; generating, by an RF power supply of the first RF generator, a first RF signal that is synchronous with the pulsed signal, wherein the first RF signal has the sub-states of the first state during a first period of time of a cycle of the pulsed signal and has the second state during a remaining period of time of the cycle of the pulsed signal; providing the first RF signal to an impedance matching circuit connected to an electrode of a plasma chamber; and providing by 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, wherein the first state of the second RF signal is generated during the first period of time and the second state of the second RF signal is generated during the remaining period of time. - View Dependent Claims (16, 17, 18, 19)
-
Specification