Patent ID: 11948826
Assignee: APPLIED MATERIALS, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 7:
8. A method of fabricating an electrostatic chuck, the method comprising:
forming a base plate;
forming a top plate;
forming a first electrode in the top plate proximate the top surface of the top plate to electrostatically grip a workpiece, when present, the first electrode having a width, and the first electrode comprising a first web of a plurality of usually orthogonal crossing wires extending across the width of the first electrode;
forming a second electrode in the top plate spaced apart from the first electrode and below the first electrode, the second electrode having a width greater than the width of the first electrode, and the second electrode comprising a second web of a plurality of usually orthogonal crossing wires extending across the width of the second electrode, wherein the width of the second electrode is greater than a width of the workpiece, when present, and the first and second electrodes for coupling to a power supply to electrostatically charge the first electrode;
forming a plurality of conductive pegs electrically connecting the first electrode to the second electrode, wherein the first electrode, the second electrode and the plurality of conductive pegs form a Faraday cage; and
forming a plurality of lift pin holes extending through the Faraday cage, each of the plurality of lift pin holes off-set from a center of the Faraday case.