Controlling temperature in substrate processing systems
An apparatus for plasma processing a substrate is provided. The apparatus comprises a processing chamber, a substrate support disposed in the processing chamber, and a lid assembly coupled to the processing chamber. The lid assembly comprises a conductive gas distributor such as a face plate coupled to a power source, and a heater coupled to the conductive gas distributor. A zoned blocker plate is coupled to the conductive gas distributor and a cooled gas cap is coupled to the zoned blocker plate. A tuning electrode may be disposed between the conductive gas distributor and the chamber body for adjusting a ground pathway of the plasma. A second tuning electrode may be coupled to the substrate support, and a bias electrode may also be coupled to the substrate support.
1. An apparatus for processing a semiconductor substrate, comprising:
a chamber body;
a lid assembly disposed on the chamber body, the lid assembly comprising:
a conductive gas distributor configured to be coupled to a source of electric power;
a zoned blocker plate having an outer side wall; and
a heater comprising an embedded heating element, the heater separably contacting a top surface of the conductive gas distributor and separably disposed around and contacting the outer side wall of the zoned blocker plate, the heater having an exposed top surface.
2. The apparatus of claim 1 , wherein the lid assembly further comprises a gas cap, wherein the zoned blocker plate is between the conductive gas distributor and the gas cap.
3. The apparatus of claim 2 , wherein the gas cap comprises a fluid circulation conduit, and the gas cap is in thermal communication with the conductive gas distributor.
4. The apparatus of claim 3 , wherein the conductive gas distributor has openings, the zoned blocker plate has openings, the gas cap has openings, the openings of the gas cap are in fluid communication with the openings in the zoned blocker plate and the conductive gas distributor, and the openings of the zoned blocker plate are in fluid communication with the openings in the conductive gas distributor.
5. The apparatus of claim 3 , wherein the heater separably contacts a periphery of the conductive gas distributor.
6. The apparatus of claim 5 , further comprising an electrode disposed between the lid assembly and a wall of the chamber body.
7. The apparatus of claim 6 , wherein the electrode is a side wall electrode.
8. The apparatus of claim 2 , wherein the conductive gas distributor is a conductive face plate.
9. The apparatus of claim 1 , further comprising an electrode disposed between the chamber body and the conductive gas distributor, wherein the electrode is coupled to a tuning circuit that is coupled to ground, wherein the tuning circuit comprises a sensor and a variable capacitor that are coupled to ground.
10. An apparatus for processing a semiconductor substrate, comprising:
a lid assembly comprising:
a conductive face plate for coupling to a source of electric power;
a zoned blocker plate contacting the conductive face plate;
a cooled gas cap contacting the zoned blocker plate and in thermal communication with the conductive face plate; and
a heating ring comprising an embedded heating element, the heating ring separably disposed around and in contact with an outer side wall of the zoned blocker plate and in separable contact with a top surface of the conductive face plate, the heating ring having an exposed top surface.
11. The apparatus of claim 10 , wherein the heating ring is in separable contact with the top surface of the conductive face plate at the periphery of the conductive face plate.
12. The apparatus of claim 10 , wherein the cooled gas cap comprises a cooling fluid conduit.
13. The apparatus of claim 10 , wherein the embedded heating element is a fluid conduit.
14. The apparatus of claim 10 , wherein the embedded heating element is a resistive heating element.
15. An apparatus for processing a semiconductor substrate in a processing chamber, comprising:
a lid assembly comprising:
a conductive face plate for coupling to a source of electric power;
a zoned blocker plate contacting the conductive face plate;
a thermally controlled gas cap contacting the zoned blocker plate and in thermal communication with the conductive face plate; and
a heating ring comprising an embedded heating element, the heating ring separably disposed around and in separable contact with an outer side wall of the zoned blocker plate and in thermal contact with a peripheral region of the conductive face plate, the heating ring having an exposed top surface and an exposed outer sidewall surface.
16. The apparatus of claim 15 , wherein the thermally controlled gas cap comprises a conduit for a thermal control fluid.
17. The apparatus of claim 16 , wherein the thermal control fluid is a cooling fluid.
18. The apparatus of claim 15 , wherein the embedded heating element is a resistive heating element.