Method for controlling chamber inner wall surface of an inductively coupled plasma etching apparatus

摘要

An inductively coupled plasma etching apparatus includes a chamber for generating a plasma therein. The chamber is defined by walls of a housing. A coil for receiving high frequency (RF) power is disposed adjacent to and outside of one of the walls of the housing. A metal plate is disposed adjacent to and outside of the wall of the housing that the coil is disposed adjacent to. The metal plate is positioned in a spaced apart relationship between the coil and the wall of the housing and has radial slits formed therein that extend transversely to the coil. A connector electrically connects the metal plate to the coil. A method for controlling an inner surface of a wall defining a chamber in which a plasma is generated is also described.