Conductive seal ring electrostatic chuck
View Patent ↗The present invention provides an improved electrostatic chuck for a substrate processing system. The electrostatic chuck comprising a main body having a top surface configured to support the substrate, a power supply to apply a voltage to the main body and a sealing ring disposed between the main body and the substrate wherein the sealing ring has a conductive layer.
1. In a substrate processing system, an electrostatic chuck comprising:
a main body having a top surface configured to support the substrate;
a power supply to apply a voltage to said main body; and
a sealing ring disposed between said main body and the substrate, said sealing ring having an applied conductive coating, said conductive coating being applied to said sealing ring from the group consisting of sputtering, evaporation, chemical vapor deposition, pulsed laser deposition, electroplating, thermal spray, plasma spray, screen printing, painting and rubbing.
2. The electrostatic chuck of claim 1 wherein said conductive coating is plasma resistant.
3. The electrostatic chuck of claim 1 wherein said conductive coating has a sheet resistance of less than or equal to about 1000 ohms per square.
4. The electrostatic chuck of claim 1 wherein said conductive coating contains a metal.
5. The electrostatic chuck of claim 4 wherein said metal is selected from the group consisting of Pt, Pd, Rh and Ni.
6. The electrostatic chuck of claim 1 wherein said conductive coating is a conductive oxide.
7. The electrostatic chuck of claim 6 wherein said conductive oxide is selected from the group consisting of ITO and SnO.
8. The electrostatic chuck of claim 1 wherein said conductive coating contains carbon.
9. The electrostatic chuck of claim 8 wherein said conductive coating contains nanotubes.
10. The electrostatic chuck of claim 1 wherein said power supply further comprising one or more electrodes.
11. In a substrate processing system, an electrostatic chuck comprising:
a main body having a top surface configured to support the substrate;
a power supply to apply a voltage to said main body; and
a sealing ring disposed between said main body and the substrate, said sealing ring is implanted with ions.
12. A method for fabricating a conductive seal ring of an electrostatic chuck for use in a substrate processing system, the method comprising:
providing the seal ring;
implanting ions into the seal ring; and
annealing the implanted seal ring.
13. A method for fabricating an electrostatic chuck conductive seal ring for use in a substrate processing system, the method comprising:
providing the electrostatic chuck seal ring; and
applying a conductive coating to the electrostatic chuck seal ring, said application of the coating being carried out from the group consisting of sputtering, evaporation, chemical vapor deposition, pulsed laser deposition, electroplating, thermal spray, plasma spray, screen printing, painting and rubbing.
14. The method for fabricating an electrostatic chuck conductive seal ring according to claim 13 wherein said application of said conductive coating further comprising:
applying an initial adhesion layer to the electrostatic chuck seal ring;
applying an intermediate barrier layer to the initial adhesion layer; and
applying a conductive layer to the intermediate barrier layer.
15. The method for fabricating an electrostatic chuck conductive seal ring according to claim 13 wherein said conductive coating is plasma resistant.
16. The method for fabricating an electrostatic chuck conductive seal ring according to claim 13 wherein said conductive coating has a sheet resistance of less than or equal to about 1000 ohms per square.
17. The method for fabricating an electrostatic chuck conductive seal ring according to claim 13 wherein said conductive coating contains a metal.
18. The method for fabricating an electrostatic chuck conductive seal ring according to claim 17 wherein said metal is selected from the group consisting of Pt, Pd, Rh and Ni.
19. The method for fabricating an electrostatic chuck conductive seal ring according to claim 13 wherein said conductive coating is a conductive oxide.
20. The method for fabricating an electrostatic chuck conductive seal ring according to claim 19 wherein said conductive oxide is selected from the group consisting of ITO and SnO.
21. The method for fabricating an electrostatic chuck conductive seal ring according to claim 13 wherein said conductive coating contains carbon.
22. The method for fabricating an electrostatic chuck conductive seal ring according to claim 21 wherein said conductive coating contains nanotubes.