Substrate support apparatus and method for fabricating same
First Claim
1. An apparatus for retaining a substrate comprising:
- a chuck body;
at least one electrode disposed within said chuck body; and
a non electrically insulating barrier formed around each of said at least one electrodes.
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Accused Products
Abstract
An apparatus for retaining a substrate and method of fabricating same. Specifically, a Johnsen-Rahbek effect electrostatic chuck comprising a chuck body, at least one electrode disposed within said chuck body and a barrier formed around said at least one electrode. The barrier is fabricated of a material selected from the group consisting of conductive materials and semiconductive materials and in one instance is an alloy of a material of which the electrode is fabricated. Alternately, the barrier is formed of a dielectric material that is not the same material of which the chuck body is fabricated. The resultant apparatus provides an electrostatic chuck that has a reduced charge accumulation effect at the electrode/chuck body interface. Reducing charge accumulation maintains the desired electrostatic chucking forces in such a device.
30 Citations
24 Claims
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1. An apparatus for retaining a substrate comprising:
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a chuck body; at least one electrode disposed within said chuck body; and a non electrically insulating barrier formed around each of said at least one electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for retaining a substrate comprising:
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an aluminum nitride chuck body; two molybdenum electrodes disposed within said chuck body; and a barrier formed around said electrodes wherein said barrier is fabricated from an alloy of said electrodes. - View Dependent Claims (13)
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14. A method for forming an electrostatic chuck comprising a chuck body, at least one electrode disposed within said chuck body and a non electrically insulating barrier disposed around each of said at least one electrode, the method comprising:
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(a) providing said at least one electrode; (b) forming said barrier around each of said at least one electrode; and (c) providing said barrier/electrode within said chuck body. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification