Patent ID: 9583357
Date: 2017-02-28
CPC Classifications: H01J,H01L

Claim:
1. A method comprising: generating a first radio frequency (RF) pulsed signal to have a high state and a low state, wherein the high state of the first RF pulsed signal has a greater amount of power than the low state of the first RF pulsed signal; providing the first RF pulsed signal to a top coil electrode associated with a plasma chamber; generating a second RF pulsed signal to have a low state for a first time period during which the first RF pulsed signal is in the high state and to have a high state for a second time period during which the first RF pulsed signal is in the low state, wherein the high state of the second RF pulsed signal has a greater amount of power than the low state of the second RF pulsed signal, wherein generating the second RF pulsed signal includes: providing the second RF pulsed signal to a bottom electrode of the plasma chamber.