Patent ID: 6635117
Filing Date: 2003-10-21
Classification: C23C,H01J

Abstract:
A gas distribution plate for a plasma processing system, comprising:(i) a generally planar central portion having apertures therein for permitting gas to pass therethrough; (ii) cooling passages for accepting a flow of cooling medium to reduce an operating temperature of said gas distribution plate, said cooling passages disposed within said generally planar central portion of the gas distribution plate and extending between and substantially perpendicularly to said apertures; (iii) a cooling medium inlet and a cooling medium outlet connected to said cooling passages to permit circulation of a cooling medium therethrough; (iv) a generally planar upper baffle plate attached to said gas distribution plate and separated by a distance therefrom, said upper baffle plate provided with apertures; and (v) a non-apertured plate overlying and covering apertures in a central portion of the upper baffle plate.