High definition heater system having a fluid medium
An apparatus, such as a heater, is provided that includes a base member having at least one fluid passageway. A two-phase fluid is disposed within the fluid passageway, a pressure of the two-phase fluid being controlled such that the two-phase fluid provides at least one of heating and cooling to the base member. A tuning layer is secured to the base member, and the tuning layer includes a plurality of zones. Furthermore, a component, such as a chuck by way of example, is secured to the tuning layer.
1. An apparatus comprising:
a base member comprising at least one fluid passageway;
a two-phase fluid is disposed within the fluid passageway, the two-phase fluid consisting of a pressurized refrigerant provided as a condensed liquid and as a gas, a pressure of the two-phase fluid being controlled such that the two-phase fluid provides at least one of heating and cooling to the base member;
a tuning layer secured to the base member, the tuning layer comprising a plurality of resistive heating elements defining a plurality of zones, the resistive heating elements being independently controllable; and
a component secured to the tuning layer,
wherein the tuning layer provides less heat transfer to the component than the base member provides to the component, when the base member provides a primary heating or a primary cooling to the component, the tuning layer selectively generates different amount of heat in the plurality of zones depending on a desired heat distribution on the component and an actual heat distribution provided by the base member to the component to fine tune the actual heat distribution provided by the base member to the component.
2. The apparatus according to claim 1 , wherein the base member comprises a plurality of fluid passageways containing the two-phase fluid, the plurality of passageways defining zones, wherein the number of zones of the base member is fewer than the number of zones of the tuning layer.
3. The apparatus according to claim 1 , wherein the tuning layer is one of a heater and a temperature sensor.
4. The apparatus according to claim 1 , wherein the component is selected from the group consisting of a chuck, a pedestal, a wafer table, a substrate support, and a showerhead.
5. The apparatus according to claim 1 , wherein the tuning layer comprises a resistive material with sufficient temperature coefficient of resistance (TCR) characteristics such that the tuning layer functions as both a heater and as a temperature sensor.
6. The apparatus according to claim 1 further comprising a secondary tuning layer secured to a top surface of the component.
7. The apparatus according to claim 1 further comprising a plurality of tuning layers.
8. The apparatus according to claim 1 further comprising a routing layer disposed between the base member and the tuning layer and defining an internal cavity for routing of power lines.
9. The apparatus according to claim 1 , wherein at least one of fluid passageways and the tuning layer are disposed around a periphery of the component.
10. The apparatus according to claim 1 further comprising:
an upper member disposed proximate the tuning layer, the upper member defining a plurality of tapered cavities aligned with each of the zones, the upper member further comprising a plurality of power vias;
a lower member adjacent the upper member and defining a plurality of reverse tapered cavities aligned with the tapered cavities of the upper member, the lower member further comprising a plurality of power vias in communication with the power vias of the upper member,
wherein control elements are disposed within the reverse tapered cavities of the lower member and are in communication with at least one of the tuning layer and a controller for the two-phase fluid within the base member.
11. The apparatus according to claim 10 , wherein the control elements communicate across a digital bus.