PIXELATED CAPACITANCE CONTROLLED ESC
First Claim
1. A chucking circuit for an electrostatic chuck (ESC), the chucking circuit comprising:
- a dielectric body having a workpiece support surface, the dielectric body comprising;
a chucking electrode disposed therein; and
a pixel electrode disposed in the dielectric body, the pixel electrode switchable between a floating state and a grounded state, wherein the pixel electrode is electrically coupled to a voltage controlled variable capacitor circuit to a ground when in the grounded state; and
a chucking circuit that includes the chucking electrode and the pixel electrode, the chucking circuit operable to electrostatically chuck a substrate to the workpiece support surface.
1 Assignment
0 Petitions
Accused Products
Abstract
Implementations described herein provide a chucking circuit for a pixilated electrostatic chuck which enables both lateral and azimuthal tuning of the RF coupling between an electrostatic chuck and a substrate placed thereon. In one embodiment, a chucking circuit for an electrostatic chuck (ESC) has one or more chucking electrodes disposed in a dielectric body of the ESC, a plurality of pixel electrodes disposed in the dielectric body, and a chucking circuit having the one or more chucking electrodes and the plurality of pixel electrodes, the chucking circuit operable to electrostatically chuck a substrate to a workpiece support surface of the ESC, the chucking circuit having a plurality of secondary circuits, wherein each secondary circuit includes at least one capacitor of a plurality of capacitors, each secondary circuit is configured to independently control an impedance between one of the pixel electrodes and a ground.
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Citations
9 Claims
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1. A chucking circuit for an electrostatic chuck (ESC), the chucking circuit comprising:
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a dielectric body having a workpiece support surface, the dielectric body comprising; a chucking electrode disposed therein; and a pixel electrode disposed in the dielectric body, the pixel electrode switchable between a floating state and a grounded state, wherein the pixel electrode is electrically coupled to a voltage controlled variable capacitor circuit to a ground when in the grounded state; and a chucking circuit that includes the chucking electrode and the pixel electrode, the chucking circuit operable to electrostatically chuck a substrate to the workpiece support surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification