Patent ID: 6035868
Filing Date: 2000-03-14
Classification: H01J,Y10S

Abstract:
A method of reducing deposit build-up on an interior surface of a plasma processing chamber wherein substrates are processed, the plasma processing chamber including an antenna and a dielectric member separating the antenna from an interior of the plasma processing chamber, comprising steps of:(a) generating plasma in the interior of the plasma processing chamber by applying radiofrequency current to the antenna, a portion of the radiofrequency current being capacitively coupled to the plasma by a voltage standing wave; and(b) controlling deposit build-up on the interior surface of the dielectric member by shifting a location of a maximum voltage amplitude of the voltage standing wave along the antenna such that an amount of ion bombardment on the interior surface of the dielectric member is varied and uniform substrate processing during sequential processing of substrates in the plasma processing chamber can be obtained.