Continuous flow deposition system

• US 6,972,055 B2
• Filed: 07/25/2003
• Issued: 12/06/2005
• Est. Priority Date: 03/28/2003
• Status: Expired due to Fees

• Current Assignee: Veeco Instruments Incorporated
• Original Assignee: Finens Corporation
• Inventors: Sferlazzo, Piero
• Primary Examiner(s): Hassanzadeh, Parviz
• Assistant Examiner(s): MOORE, KARLA A
• Application Number:
  US10/604,502
• Publication Number:
  US 20040187784A1
• Time in Patent Office: 865 Days
• Field of Search: 156/345.31, 156/345.32, 118/719, 414/939, 204/298.25
• US Class Current: 118/719
• CPC Class Codes: C23C 16/45508 Radial flow
• CPC Class Codes: C23C 16/45551 for relative movement of the substrate and the gas injectors or half-reaction reactor compartments
• CPC Class Codes: C23C 16/4584 the substrate being rotated
• CPC Class Codes: Y10S 414/139 including wafer charging or discharging means for vacuum chamber

Abstract

An atomic layer deposition system is described that includes a deposition chamber. A first and second reaction chamber are positioned in the deposition chamber and contain a first and a second reactant species, respectively. A monolayer of the first reactant species is deposited on a substrate passing through the first reaction chamber. A monolayer of the second reactant species is deposited on a substrate passing through the second reaction chamber. A transport mechanism transports a substrate in a path through the first reaction chamber and through the second reaction chamber, thereby depositing a film on the substrate by atomic layer deposition. The shape of the first and the second reaction chambers are chosen to achieve a constant exposure of the substrate to reactant species when the transport mechanism transports the substrate in the path through the respective reaction chambers at the constant transport rate.

Claims

1. An atomic layer deposition system comprising:

a) a deposition chamber;

b) a first reaction chamber being positioned in the deposition chamber, the first reaction chamber comprising solid walls that contain a first reactant species and a seal comprising at least one of a sliding seal and a corrugated seal that prevents the first reactant species from escaping, a monolayer of the first reactant species being deposited on a substrate passing through the first reaction chamber;

c) a second reaction chamber being positioned in the deposition chamber, the second reaction chamber comprising solid walls that contain a second reactant species and a seal comprising at least one of a sliding seal and a corrugated seal that prevents the second reactant species from escaping, a monolayer of the second reactant species being deposited on a substrate passing through the second reaction chamber;

d) a vacuum pump having an input that is in vacuum communication with a region between the first and the second reaction chambers, the vacuum pump reducing pressure inside the region between the first and the second reaction chambers to a pressure that is less than a pressure inside the first and the second reaction chamber; and

e) a transprot mechanism that transports a substrate in a path through the first reaction chamber and through the second reaction chamber at a constant transport rate, thereby depositing a film on the substrate by atomic layer depositon.

2. The deposition system of claim 1 wherein a first and a second radial edge of at least one of the first and the second reaction chambers is aligned to a center of the deposition chamber.

3. The deposition system of claim 1 wherein at least one of the first and the second reaction chambers is formed in the shape of a trapezoid.

4. The deposition system of claim 1 further comprising a processing region that is positioned in the deposition chamber, a surface treatment being performed on a substrate passing through the processing region.

5. The deposition system of claim 1 wherein at least one of the first reaction chamber and the second reaction chamber comprises a plasma generator, the plasma generator generating a plasma in the at least one of the first and the second reaction chambers for plasma enhanced deposition.

6. The deposition system of claim 1 wherein at least one of the first reaction chamber and the second reaction chamber comprises a differentially pumped interface.

7. The deposition system of claim 1 wherein the first reaction chamber comprises a first gas injection manifold and the second reaction chamber comprises a second gas injection manifold, the first and the second gas injection manifolds providing a respective one of the first and second reactant species to the first and the second reaction chambers.

8. The deposition system of claim 1 wherein the first reaction chamber and the second reaction chamber transport relative to the substrate.

9. The deposition system of claim 1 wherein the region between the first and the second reaction chambers comprises an interface between the first and the second reaction chambers.

10. An atomic layer deposition system comprising:

a) a deposition chamber;

b) a first reaction chamber being positioned in the deposition chamber, the first reaction chamber comprising solid walls that contain a first reactant species and a seal comprising at least one of a sliding seal and a corrugated seal that prevents the first reactant species from escaping, a monolayer of the first reactant species being deposited on a substrate passing through the first reaction chamber;

c) a second reaction chamber being positioned in the deposition chamber, the second reaction chamber comprising solid walls that contain a second reactant species and a seal comprising at least one of a sliding seal and a corrugated seal that prevents the second reactant species from escaping, a monolayer of the sceond reactant species being deposited on a substrate passing through the second reaction chamber;

d) a vacuum pump having an input that is in vacuum communication with a region between the first and the second reaction chambers, the vacuum pump reducing pressure inside the region between the first and the second reaction chambers to a pressure that is less than a pressure inside the first and the second reaction chamber;

e) a processing region that is positioned in the deposition chamber, a surface treatment being performed on a substrate passing through the processing region; and

f) a transport mechanism that transports a substrate in a path through the first reaction chamber, through the second reaction chamber, and through the processing region, thereby depositing a film on the substrate by atomic layer deposition.

11. The deposition system of claim 10 wherein a shape of at least one of the first and the second reaction chambers is chosen to achieve a constant exposure of the substrate to a respective one of the first and the second reactant species when the transport mechanism transports the substrate in the path through the respective one of the first and the second reaction chamber at a constant transport rate.

12. The deposition system of claim 10 wherein at least one of the first reaction chamber and the second reaction chamber comprises a plasma generator, the plasma generator generating a plasma in the at least one of the first and the second reaction region for plasma enhanced deposition.

13. The deposition system of claim 10 wherein at least one of the first reaction chamber and the second reaction chamber comprises a differentially pumped interface that maintains a partial pressure in the at least one of the first and the second reaction chambers.

14. The deposition system of claim 10 wherein the first reaction chamber comprises a first gas injection manifold and the second reaction chamber comprises a second gas injection manifold, the first and the second gas injection manifolds providing a respective one of the first and second reactant species to the first and the second reaction chambers.

15. The deposition system of claim 14 wherein a shape of a respective one of the first and the second gas injection manifolds is chosen to provide a substantially constant flow of reactant species as the substrate passes through a respective one of the first and the second reaction chambers.

16. The deposition system of claim 10 wherein the processing region is formed in a shape that causes a substantially constant exposure of the surface treatment being performed on the substrate passing through the processing region.

17. The deposition system of claim 10 further comprising a plasma generator that generates a plasma in the processing region, the substrate passing through the processing region being exposed to the plasma, thereby performing the surface treatment.

18. The deposition system of claim 17 wherein the plasma generator comprises a magnetron that sputters a metal layer on the substrate passing through the processing region.

19. The deposition system of claim 17 wherein the plasma generator comprises a downstream plasma generator that is remotely located relative to the deposition chamber.

20. The deposition system of claim 10 further comprising an ion gun that generates an ion beam in the processing region, the ion beam striking the substrate passing through the processing region, thereby performing the surface treatment.

21. The deposition system of claim 10 further comprising an electron gun that generates an electron beam in the processing region, the electron beam striking the substrate passing through the processing region, thereby performing the surface treatment.

22. The deposition system of claim 10 further comprising an UV radiation source that generates UV radiation in the processing region, the UV radiation striking the substrate passing through the processing region, thereby performing the surface treatment.

23. The deposition system of claim 10 further comprising a substrate support that supports the substrate as the transport mechanism transports the substrate in the path through the first reaction chamber, through the second reaction chamber, and through the processing region.

24. The deposition system of claim 10 wherein the first reaction chamber, the second reaction chamber, and the process chamber are transported relative to the substrate.

25. The deposition system of claim 10 further comprising a third and a fourth reaction chamber that are positioned in the deposition chamber.

26. The deposition system of claim 25 wherein the third reaction chamber contains the first reactant species and the fourth reaction chamber contains the second reactant species, a monolayer of the first reactant species being deposited on a substrate passing through the third reaction chamber and a monolayer of the second reactant species being deposited on a substrate passing through the fourth reaction chamber.

27. The deposition system of claim 25 wherein the third reaction chamber contains a third reactant species and the fourth reaction chamber contains a fourth reactant species, a monolayer of the third reactant species being deposited on a substrate passing through the third reaction chamber and a monolayer of the fourth reactant species being deposited on a substrate passing through the fourth reaction chamber.

28. The deposition system of claim 10 wherein the transport mechanism transports a substrate in the path at a substantially constant rate.

29. The deposition system of claim 10 further comprising a port for transporting a substrate into and out of the deposition chamber.

30. The deposition system of claim 10 wherein a pressure in the deposition chamber is chosen to direct reactant gas and by-product gases away from the first reaction chamber and the second reaction chamber.

31. The deposition system of claim 10 wherein the region between the first and the second reaction chambers comprises an interface between the first and the second reaction chambers.

32. An atomic layer deposition system comprising:

a) means for transporting a substrate through a first reaction chamber comprising solid walls that contain a first reactant species and a seal comprising at least one of a sliding seal and a corrugated seal that prevents the first reactant species from escaping, thereby forming a monolayer of the first reactant species on the substrate;

b) means for transporting a substrate through a second reaction chamber comprising solid walls that contain a second reactant species and a seal comprising at least one of a sliding seal and a corrugated seal that prevents the second reactant species from escaping, thereby forming a monolayer of the second reactant species on the substrate;

c) means for evacuating a region between the first and the second reaction chambers to a pressure that is less than a pressure inside the first and the second reaction chamber; and

d) means for transporting a substrate through a processing region, thereby performing a surface treatment on the substrate.