Electrostatic chuck having reduced arcing
First Claim
1. An electrostatic chuck for retaining a substrate, comprising:
- an electrically conductive body having one or more channels formed in an upper surface thereof;
a single plate positioned within the one or more channels to define one or more plenums between the body and the plate, wherein the surfaces of the plenum are anodized, wherein the one or more channels further include an outer channel and an inner channel disposed proximate a peripheral edge of the body, and wherein the outer channel forms an outer plenum with the plate and the inner channel forms an inner plenum with the plate;
one or more fluid passages disposed in the plate and fluidly coupling the one or more plenums to the upper surface of the body, wherein the surfaces of the fluid passages are electrically insulated; and
a dielectric layer disposed over the upper surface of the body and the plate, wherein the dielectric layer forms a support surface for a substrate to be disposed thereon, and wherein the one or more fluid passages are positioned to distribute a fluid to a back surface of the substrate when disposed on the support surface.
1 Assignment
0 Petitions
Accused Products
Abstract
Electrostatic chucks and methods of manufacturing the same are provided herein. In some embodiments, an electrostatic chuck comprises an electrically conductive body having one or more channels formed in an upper surface thereof; a plate positioned within the one or more channels to define one or more plenums between the body and the plate, wherein the surfaces of the plenum are anodized; one or more fluid passages disposed in the plate and fluidly coupling the one or more plenums to the upper surface of the body, wherein the surfaces of the fluid passages are electrically insulated; and a dielectric layer disposed over the upper surface of the body and the plate, wherein the dielectric layer forms a support surface for a substrate to be disposed thereon.
34 Citations
14 Claims
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1. An electrostatic chuck for retaining a substrate, comprising:
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an electrically conductive body having one or more channels formed in an upper surface thereof; a single plate positioned within the one or more channels to define one or more plenums between the body and the plate, wherein the surfaces of the plenum are anodized, wherein the one or more channels further include an outer channel and an inner channel disposed proximate a peripheral edge of the body, and wherein the outer channel forms an outer plenum with the plate and the inner channel forms an inner plenum with the plate; one or more fluid passages disposed in the plate and fluidly coupling the one or more plenums to the upper surface of the body, wherein the surfaces of the fluid passages are electrically insulated; and a dielectric layer disposed over the upper surface of the body and the plate, wherein the dielectric layer forms a support surface for a substrate to be disposed thereon, and wherein the one or more fluid passages are positioned to distribute a fluid to a back surface of the substrate when disposed on the support surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrostatic chuck for retaining a substrate, comprising:
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an electrically conductive body having a plurality of channels formed in an upper surface thereof; a single plate positioned within the plurality of channels to define one or more plenums between the body and the plate, wherein the surfaces of the plenum are anodized; one or more fluid passages disposed in the plate and fluidly coupling the one or more plenums to the upper surface of the body, wherein the surfaces of the fluid passages are electrically insulated; a dielectric layer disposed over the upper surface of the body and the plate, wherein the dielectric layer forms a support surface for a substrate to be disposed thereon, and wherein the one or more fluid passages are positioned to distribute a fluid to a back surface of the substrate when disposed on the support surface; and a plurality of embossed features extending upward from an upper surface of the dielectric layer, wherein each embossed feature has a cross section having a smoothly varying peripheral edge disposed atop the dielectric layer, wherein the smoothly varying peripheral edge of at least some of the embossed features form an outlet portion of at least some of the one or more fluid passages. - View Dependent Claims (10)
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11. An apparatus for processing a substrate, comprising:
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a chamber defining a process region; an electrostatic chuck for retaining a substrate in the process region, the electrostatic chuck comprising; an electrically conductive body having one or more channels formed in an upper surface thereof; a single plate positioned within the one or more channels to define one or more plenums between the body and the plate, wherein the surfaces of the plenum are anodized, wherein the one or more channels further include an outer channel and an inner channel disposed proximate a peripheral edge of the body, and wherein the outer channel forms an outer plenum with the plate and the inner channel forms an inner plenum with the plate; one or more fluid passages disposed in the plate and fluidly coupling the one or more plenums to the upper surface of the body, wherein the surfaces of the fluid passages are electrically insulated; and a dielectric layer disposed over the upper surface of the body and the plate, wherein the dielectric layer forms a support surface for a substrate to be disposed thereon, and wherein the one or more fluid passages are positioned to distribute a fluid to a back surface of the substrate when disposed on the support surface. - View Dependent Claims (12, 13, 14)
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Specification