Patent ID: 9396912
Filing Date: 2016-07-19
CPC Classification: B08B,C23C,H01J

Claim Text:
1. A method for cleaning a showerhead electrode, comprising: sealing a showerhead electrode within a cleaning assembly such that a first cleaning volume is formed on a first side of the showerhead electrode within a high pressure closure member sealed to the showerhead electrode and a second cleaning volume is formed on a second side of the showerhead electrode within a low pressure closure member sealed to the showerhead electrode, wherein the showerhead electrode comprises a plurality of gas passages that extend through the showerhead electrode from the first side of the showerhead electrode to the second side of the showerhead electrode; loading an acidic solution into the first cleaning volume on the first side of the showerhead electrode; after the loading, pressurizing the first cleaning volume on the first side of the showerhead electrode such that at least a portion of the acidic solution flows through one or more of the plurality of gas passages of the showerhead electrode; and propelling an amount of purified water through a fluid injection inlet coupled to the low pressure closure member and in fluid communication with the second cleaning volume on the second side of the showerhead electrode, and into contact with the second side of the showerhead electrode.