Methods for depositing a transition metal nitride film on a substrate by atomic layer deposition and related deposition apparatus
An apparatus and method for depositing a transition metal nitride film on a substrate by atomic layer deposition in a reaction space defined by an at least one chamber wall and showerhead is disclosed. The apparatus may include, a substrate support disposed within the reaction space, the substrate support configured for supporting at least one substrate and a temperature control system for controlling a temperature of the at least one chamber wall at those portions of the at least one chamber wall that is exposed to a vapor phase reactant. The apparatus may also include a temperature control system for controlling a temperature of the showerhead, wherein the temperature control system for controlling a temperature of the showerhead is configured to control the temperature of the showerhead to a temperature of between approximately 80° C. and approximately 160° C. The method may include, providing at least one substrate on a substrate support within the reaction space and controlling a temperature of the at least one chamber wall at least at those portions of the at least one chamber wall that is exposed to a vapor phase reactant and controlling a temperature of a showerhead. The method may also include, alternatively and sequentially feeding at least two vapor phase reactants into the reaction space, wherein the temperature of the showerhead is controlled to a temperature between approximately 80° C. and approximately 160° C.
1. An apparatus, comprising:
a reaction chamber comprising a plurality of vertical chamber walls, wherein at least one of the plurality of chamber walls comprise a first plurality of zones;
a showerhead arranged above the reaction chamber and perpendicular to the vertical chamber walls, wherein the showerhead comprises a second plurality of zones;
a reaction space defined by the vertical chamber walls and the showerhead;
a substrate support disposed within the reaction space, the substrate support configured for supporting a substrate;
a first temperature control system coupled to the at least one chamber wall for independently controlling a temperature of each of the first plurality of zones in the at least one chamber wall, wherein the first temperature control system comprises a first plurality of heaters and a first plurality of temperature sensors in the first plurality of zones, wherein the first plurality of heaters is disposed within or proximate the at least one chamber wall, wherein the first temperature control system is configured to independently control the temperature of each of the first plurality of zones in the at least one chamber wall to a temperature between approximately 90° C. and approximately 140° C.;
a second temperature control system for independently controlling a temperature of each of the second plurality of zones in the showerhead, wherein the second temperature control system comprises a second plurality of heaters and a second plurality of temperature sensors in the second plurality of zones, wherein the second plurality of heaters is disposed within or on the showerhead, wherein the second temperature control system is configured to independently control the temperature of each of the second plurality of zones in the showerhead to a temperature between approximately 90° C. and approximately 140° C.;
a third temperature control system for controlling the temperature of the substrate on the substrate support, wherein the third temperature control system comprises a third heater, wherein the third heater is disposed within the substrate support;
a first vapor phase reactant source comprising titanium tetrachloride (TiCl 4 );
a second vapor phase reactant source comprising ammonia (NH 3 ); and
an ALD control system, wherein the ALD control system is configured to alternatively and sequentially feed titanium tetrachloride and ammonia to the substrate,
wherein the first temperature control system, the second control system, and the third temperature control system are independent from each other.
2. The apparatus of claim 1 , wherein the plurality of second heaters is disposed within the showerhead.
3. The apparatus of claim 1 , further comprising a thermal isolation material disposed between the showerhead and at least one chamber wall.
4. The apparatus of claim 3 , wherein the thermal isolation material comprises at least one of a ceramic or a polymer.
5. The apparatus of claim 1 , wherein the second temperature control system comprises at least one of radiative heating and inductive heating.
6. The apparatus of claim 1 , wherein the second temperature control system further comprises a circulating fluid.
7. The apparatus of claim 5 , wherein the second temperature control system comprises a radiative heating element.
8. The apparatus of claim 1 , wherein the first temperature control system further comprises a circulating fluid.
9. The apparatus of claim 5 , wherein the second temperature control system comprises an inductive heating element.
10. An apparatus, comprising:
a reaction chamber comprising a plurality of chamber walls, wherein at least one of the plurality of chamber walls comprise a first plurality of zones;
a showerhead arranged above the reaction chamber and adjacent to the chamber walls, wherein the showerhead comprises a second plurality of zones;
a reaction space defined by the plurality of chamber walls and the showerhead;
a first plurality of temperature sensors, a first plurality of heaters, and a first recirculation loop coupled to at least one chamber wall from the plurality of chamber walls;
a second plurality of temperature sensors, a second plurality of heaters, and a second recirculation loop coupled to the showerhead;
a substrate support disposed within the reaction space, the substrate support configured for supporting a substrate;
a first temperature control system for independently controlling temperatures of each of the first plurality of zones in the at least one chamber wall between approximately 90° C. and approximately 140° C.;
a second temperature control system for independently controlling temperatures of each of the second plurality of zones in the showerhead to a temperature between approximately 90° C. and approximately 140° C.;
a third temperature control system for independently controlling a temperature of a substrate on the substrate support, wherein the third temperature control system comprises a third temperature sensor and a third heater coupled to the substrate support,
a first vapor phase reactant source comprising titanium tetrachloride (TiCl 4 );
a second vapor phase reactant source comprising ammonia (NH 3 ); and
an ALD control system, wherein the ALD control system is configured to alternatively and sequentially feed titanium tetrachloride and ammonia to the substrate,
wherein the first temperature control system, the second control system, and the third temperature control system are independent from each other.
11. The apparatus of claim 10 , further comprising a thermal isolation material disposed between the showerhead and at least one chamber wall from the plurality of chamber walls.
12. The apparatus of claim 11 , wherein the thermal isolation material comprises at least one of a ceramic or a polymer.
13. The apparatus of claim 10 , further comprising a substrate, wherein the substrate comprises a transition metal nitride film, and wherein the transition metal nitride film comprises a titanium nitride film.
14. The apparatus of claim 10 , wherein the second temperature control system comprises at least one of radiative heating and inductive heating.