Patent ID: 8215321
Filing Date: 2012-07-10
Classification: B08B,C23C

Abstract:
1. A flushing fixture adapted for cleaning a backing plate, or a showerhead electrode assembly including the backing plate and an electrode plate, for a plasma processing chamber, the flushing fixture comprising: a base plate comprising a recessed inner portion including an upper surface, an outer portion, a lower surface, a plurality of liquid passages extending between the upper surface and the lower surface, the upper surface configured to support the backing plate or the showerhead electrode assembly; and a cover plate configured to cover the base plate and enclose the backing plate or showerhead electrode assembly when the backing plate or showerhead electrode assembly is supported on the upper surface of the base plate, the cover plate including at least one liquid passage through which a flushing liquid is introduced into an interior of the flushing fixture defined by the base plate and cover plate, the flushing liquid passes through gas passages in the backing plate, or through gas passages in the backing plate and electrode plate of the showerhead electrode assembly, and exits the flushing fixture through the liquid passages in the base plate.