Hybrid ceramic showerhead
First Claim
1. An apparatus comprising:
- a gas distributor including;
a ceramic faceplate for a substrate processing showerhead of a processing chamber, the ceramic faceplate including a first pattern of first through-holes;
an electrode including a second pattern of second through-holes;
an electrically conductive contact ring encircling the first pattern of first through-holes; and
a plurality of standoffs, wherein the standoffs are electrically conductive and each electroconductively couple the electrode with the contact ring, wherein;
the electrode is embedded within the ceramic faceplate,the second pattern matches the first pattern,the first pattern includes all of the through-holes through which processing gases flow through the ceramic faceplate when the ceramic faceplate is installed in the substrate processing showerhead of the processing chamber,each second through-hole is larger in size than the corresponding first through-hole, andeach blind hole terminates at the electrode and is occupied by a different one of the standoffs.
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Accused Products
Abstract
Various implementations of hybrid ceramic faceplates for substrate processing showerheads are provided. The hybrid ceramic showerhead faceplates may include an electrode embedded within the ceramic material of the faceplate, as well as a pattern of through-holes. The electrode may be fully encapsulated within the ceramic material with respect to the through-holes. In some implementations, a heater element may also be embedded within the hybrid ceramic showerhead faceplate. A DC voltage source may be electrically connected with the hybrid ceramic showerhead faceplate during use. The hybrid ceramic faceplates may be easily removable from the substrate processing showerheads for easy cleaning and faceplate replacement.
244 Citations
20 Claims
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1. An apparatus comprising:
a gas distributor including; a ceramic faceplate for a substrate processing showerhead of a processing chamber, the ceramic faceplate including a first pattern of first through-holes; an electrode including a second pattern of second through-holes; an electrically conductive contact ring encircling the first pattern of first through-holes; and a plurality of standoffs, wherein the standoffs are electrically conductive and each electroconductively couple the electrode with the contact ring, wherein; the electrode is embedded within the ceramic faceplate, the second pattern matches the first pattern, the first pattern includes all of the through-holes through which processing gases flow through the ceramic faceplate when the ceramic faceplate is installed in the substrate processing showerhead of the processing chamber, each second through-hole is larger in size than the corresponding first through-hole, and each blind hole terminates at the electrode and is occupied by a different one of the standoffs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification