Lam Research Corporation
Plasma light up suppression

Abstract:

A method for suppressing arcing in helium distribution channels of an electrostatic chuck in a plasma processing chamber, wherein the electrostatic chuck is connected to a voltage source for providing a chucking voltage and wherein the plasma processing chamber comprises a process gas source, and a plasma power source for transforming the process gas into a plasma is provided. A gas is flowed through the helium distribution channels of an electrostatic chuck to a back side of a wafer. The gas comprises helium and an electronegative gas.