MULTIPLE AMPOULE DELIVERY SYSTEMS

• US 20090211525A1
• Filed: 02/12/2009
• Published: 08/27/2009
• Est. Priority Date: 02/22/2008
• Status: Abandoned Application

• Current Assignee: Praxair Technology Incorporated (Linde Plc)
• Original Assignee: Praxair Technology Incorporated (Linde Plc)
• Inventors: Hoover, Cynthia A., Krause, Michael Joseph, Spohn, Ronald, Sarigiannis, Demetrius, Pryor, Edward, Chesters, Stephen
• Application Number:
  US12/369,799
• Publication Number:
  US 20090211525A1
• Time in Patent Office: Days
• US Class Current: 118/707
• CPC Class Codes: C23C 16/4481 by evaporation using carrier gas in contact with the source material C23C16/4486 takes precedence
• CPC Class Codes: C23C 16/45561 Gas plumbing upstream of the reaction chamber
• CPC Class Codes: Y10T 137/0324 With control of flow by a condition or characteristic of a fluid

Abstract

This invention relates to an integrated vapor or liquid phase reagent dispensing apparatus having a plurality of vessels and a plurality of carrier or inert gas feed/vapor or liquid phase reagent delivery manifolds, that may be used for continuously dispensing vapor or liquid phase reagents such as precursors for deposition of materials in the manufacture of semiconductor materials and devices.

Claims

1. An integrated vapor phase reagent dispensing apparatus comprising:

a plurality of vessels, each vessel comprising a top wall member, a sidewall member and a bottom wall member configured to form an internal vessel compartment to hold a source chemical up to a fill level and to additionally define an inner gas volume above the fill level;

a portion of the top wall member having a carrier gas feed inlet opening comprising a bubbler tube that extends through the inner gas volume into the source chemical and through which said carrier gas can be bubbled into the source chemical to cause at least a portion of source chemical vapor to become entrained in said carrier gas to produce a flow of vapor phase reagent to said inner gas volume above the fill level, said bubbler tube having an inlet end adjacent to the top wall member and an outlet end adjacent to the bottom wall member; and

a portion of the top wall member having a vapor phase reagent outlet opening through which said vapor phase reagent can be dispensed from said vessel; and

a plurality of carrier gas feed/vapor phase reagent delivery manifolds, each of said carrier gas feed/vapor phase reagent delivery manifolds interconnected with each other;

each vessel connected to at least one carrier gas feed/vapor phase reagent delivery manifold;

each carrier gas feed/vapor phase reagent delivery manifold comprising a carrier gas feed line and a vapor phase reagent discharge line;

said carrier gas feed line extending from the carrier gas feed inlet opening upwardly and exteriorly from the top wall member for delivery of carrier gas into said inner gas volume above the fill level, the carrier gas feed line containing one or more carrier gas flow control valves therein for control of flow of the carrier gas therethrough; and

said vapor phase reagent discharge line extending from the vapor phase reagent outlet opening upwardly and exteriorly from the top wall member for removal of vapor phase reagent from said inner gas volume above the fill level, the vapor phase reagent discharge line optionally containing one or more vapor phase reagent flow control valves therein for control of flow of the vapor phase reagent therethrough; and

one or more controllers for directing communication with each of said carrier gas feed/vapor phase reagent delivery manifolds and each of said vessels, in such a way that each of said carrier gas feed/vapor phase reagent delivery manifolds are operable independently of one another, and each of said vessels are operable independently of one another.

2. The integrated vapor phase reagent dispensing apparatus of claim 1 further comprising a plurality of sourcing gas manifolds, each of said sourcing gas manifolds interconnected with each other;

each sourcing gas manifold connected to at least one carrier gas feed/vapor phase reagent delivery manifold;

each sourcing gas manifold comprising a carrier gas feed line continuous with said carrier gas feed line of said carrier gas feed/vapor phase reagent delivery manifold;

the carrier gas feed line containing one or more carrier gas flow control valves therein for control of flow of the carrier gas therethrough, and a pressure transducer for monitoring and controlling the pressure of the sourcing gas manifold.

3. The integrated vapor phase reagent dispensing apparatus of claim 2 further comprising:

a deposition chamber selected from a chemical vapor deposition chamber and an atomic layer deposition chamber;

the vapor phase reagent discharge line connecting the integrated vapor phase reagent dispensing apparatus to the deposition chamber;

optionally a heatable susceptor contained within the deposition chamber and located in a receiving relationship to the vapor phase reagent discharge line; and

an effluent discharge line connected to the deposition chamber;

such that vapor phase reagent passes through the vapor phase reagent discharge line and into the deposition chamber, for contact with a substrate, optionally on the heatable susceptor, and any remaining effluent is discharged through the effluent discharge line.

4. The integrated vapor phase reagent dispensing apparatus of claim 3 wherein said controller has an algorithm for directing communication with each of said sourcing gas manifolds, each of said carrier gas feed/vapor phase reagent delivery manifolds, each of said vessels, and said deposition chamber, in such a way that each of said sourcing gas manifolds are operable independently of one another, each of said carrier gas feed/vapor phase reagent delivery manifolds are operable independently of one another, and each of said vessels are operable independently of one another.

5. The integrated vapor phase reagent dispensing apparatus of claim 3 wherein said controller receives digital and analog inputs from each of said sourcing gas manifolds, each of said carrier gas feed/vapor phase reagent delivery manifolds, and each of said vessels, and uses said digital and analog inputs to perform operations.

6. The integrated vapor phase reagent dispensing apparatus of claim 3 wherein said controller receives command inputs from said deposition chamber, and uses said command inputs to perform operations.

7. The integrated vapor phase reagent dispensing apparatus of claim 5 wherein said operations comprise controlling temperature in separate temperature zones in each of said carrier gas feed/vapor phase reagent delivery manifolds, each of said vessels, and each of said sourcing gas manifolds;

controlling valves in each of said carrier gas feed/vapor phase reagent delivery manifolds and each of said sourcing gas manifolds;

monitoring thermocouples and valve position indicators for feedback in each of said carrier gas feed/vapor phase reagent delivery manifolds, each of said vessels, and each of said sourcing gas manifolds;

relaying electric and pneumatic valve actuation signals from the deposition chamber to each of said active carrier gas feed/vapor phase reagent delivery manifolds and each of said active sourcing gas manifolds; and

communicating with said deposition chamber involving emergency gas off (EGO) of cabinet, temperature warnings, temperature alarms, valve position information, level sensor information and other alarms.

8. The integrated vapor phase reagent dispensing apparatus of claim 6 wherein said operations comprise controlling temperature in separate temperature zones in each of said carrier gas feed/vapor phase reagent delivery manifolds, each of said sourcing gas manifolds, and each of said vessels;

controlling valves in each of said carrier gas feed/vapor phase reagent delivery manifolds and each of said sourcing gas manifolds;

monitoring thermocouples and valve position indicators for feedback in each of said carrier gas feed/vapor phase reagent delivery manifolds, each of said vessels, and each of said sourcing gas manifolds;

relaying electric and pneumatic valve actuation signals from the deposition chamber to each of said active carrier gas feed/vapor phase reagent delivery manifolds and each of said active sourcing gas manifolds; and

communicating with said deposition chamber involving emergency gas off (EGO) of cabinet, temperature warnings, temperature alarms, valve position information, level sensor information and other alarms.

9. The integrated vapor phase reagent dispensing apparatus of claim 3 wherein said controller comprises a programmable logic controller.

10. The integrated vapor phase reagent dispensing apparatus of claim 5 wherein said controller relays said digital and analog inputs to a computer, allowing a user to monitor said operations.

11. The integrated vapor phase reagent dispensing apparatus of claim 6 wherein said controller relays said command inputs to a computer, allowing a user to monitor said operations.

12. The integrated vapor phase reagent dispensing apparatus of claim 1 wherein each of said vessels includes at least one source chemical level sensor and at least one temperature sensor, said controller directing communication with each of the source chemical level sensors and each of the temperature sensors to operate each of said sourcing gas manifolds independently of one another, each of said carrier gas feed/vapor phase reagent delivery manifolds independently of one another, and each of said vessels independently of any other of said vessels.

13. The integrated vapor phase reagent dispensing apparatus of claim 1 further comprising the vapor phase reagent discharge line in vapor phase reagent flow communication with a vapor phase delivery deposition system, said deposition system selected from a chemical vapor deposition system and an atomic layer deposition system.

14. The integrated vapor phase reagent dispensing apparatus of claim 1 wherein the source chemical comprises a liquid or solid precursor for a metal selected from Group 2, Group 3, Group 4, Group 5, Group 6, Group 7, Group 8, Group 9, Group 10, Group 11, Group 12, Group 13, Group 14, Group 15, Group 16, the Lanthanide series and the Actinide series of the Periodic Table.

15. The integrated vapor phase reagent dispensing apparatus of claim 1 wherein the vapor phase reagent comprises a vapor phase precursor for a metal selected from Group 2, Group 3, Group 4, Group 5, Group 6, Group 7, Group 8, Group 9, Group 10, Group 11, Group 12, Group 13, Group 14, Group 15, Group 16, the Lanthanide series and the Actinide series of the Periodic Table.

16. The integrated vapor phase reagent dispensing apparatus of claim 3 wherein said substrate is comprised of a material selected from a metal, a metal silicide, a semiconductor, an insulator and a barrier material.

17. A method for delivery of a vapor phase reagent to a deposition chamber comprising:

(a) providing a integrated vapor phase reagent dispensing apparatus comprising;

a plurality of vessels, each vessel comprising a top wall member, a sidewall member and a bottom wall member configured to form an internal vessel compartment to hold a source chemical up to a fill level and to additionally define an inner gas volume above the fill level;

a portion of the top wall member having a carrier gas feed inlet opening comprising a bubbler tube that extends through the inner gas volume into the source chemical and through which said carrier gas can be bubbled into the source chemical to cause at least a portion of source chemical vapor to become entrained in said carrier gas to produce a flow of vapor phase reagent to said inner gas volume above the fill level, said bubbler tube having an inlet end adjacent to the top wall member and an outlet end adjacent to the bottom wall member; and

a portion of the top wall member having a vapor phase reagent outlet opening through which said vapor phase reagent can be dispensed from said vessel; and

a plurality of carrier gas feed/vapor phase reagent delivery manifolds, each of said carrier gas feed/vapor phase reagent delivery manifolds interconnected with each other;

each vessel connected to at least one carrier gas feed/vapor phase reagent delivery manifold;

each carrier gas feed/vapor phase reagent delivery manifold comprising a carrier gas feed line and a vapor phase reagent discharge line;

said carrier gas feed line extending from the carrier gas feed inlet opening upwardly and exteriorly from the top wall member for delivery of carrier gas into said inner gas volume above the fill level, the carrier gas feed line containing one or more carrier gas flow control valves therein for control of flow of the carrier gas therethrough; and

said vapor phase reagent discharge line extending from the vapor phase reagent outlet opening upwardly and exteriorly from the top wall member for removal of vapor phase reagent from said inner gas volume above the fill level, the vapor phase reagent discharge line optionally containing one or more vapor phase reagent flow control valves therein for control of flow of the vapor phase reagent therethrough; and

one or more controllers for directing communication with each of said carrier gas feed/vapor phase reagent delivery manifolds and each of said vessels, in such a way that each of said carrier gas feed/vapor phase reagent delivery manifolds are operable independently of one another, and each of said vessels are operable independently of one another;

(b) adding source chemical to one or more of said vessels;

(c) heating the source chemical in one or more of said vessels to a temperature sufficient to vaporize the source chemical to provide vapor phase reagent;

(d) feeding a carrier gas into one or more of said vessels through said carrier gas feed line and said bubbler tube;

(e) withdrawing the vapor phase reagent and carrier gas from one of said vessels, independently of any other of said vessels, through said vapor phase reagent discharge line; and

(f) feeding the vapor phase reagent and carrier gas into said deposition chamber.

18. The method of claim 17 further comprising:

(g) contacting the vapor phase reagent with a substrate, optionally on a heatable susceptor, within the deposition chamber; and

(h) discharging any remaining effluent through an effluent discharge line connected to the deposition chamber.

19. The method of claim 17 further comprising detecting a low level of source chemical in at least one of said vessels and exchanging said low level vessel.

20. The method of claim 17 further comprising, simultaneously with dispensing said vapor phase reagent and carrier gas from one of said vessels into said deposition chamber, disconnecting another vessel containing a low level of source chemical from said integrated vapor phase reagent dispensing apparatus, refilling said vessel, and replacing said vessel in said integrated vapor phase reagent dispensing apparatus.