Semiconductor manufacturing system with getter safety device
First Claim
1. A semiconductor manufacturing system, comprising:
- a getter-based gas purifier coupled in flow communication with a gas distribution network for a semiconductor fabrication facility, said gas distribution network supplying purified gas to at least one wafer processing chamber in said semiconductor fabrication facility, wherein said gas purifier comprises;
a getter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between said inlet and said outlet, the getter column further having a first high melting point, nonmetallic liner disposed in the vessel such that at least some of the top portion of getter material disposed in said vessel is separated from the containment wall of the vessel and a second high melting point, nonmetallic liner disposed in the vessel such that at least some of the bottom portion of the getter material is separated from the containment wall of the vessel;
a first temperature sensor disposed in a top portion of said getter material, said first temperature sensor being located in a melt zone; and
a second temperature sensor disposed in a bottom portion of said getter material, said second temperature sensor being located in a melt zone.
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Accused Products
Abstract
A semiconductor manufacturing system includes a getter-based gas purifier coupled in flow communication with a gas distribution network for a semiconductor fabrication facility. The gas distribution network supplies purified gas to at least one wafer processing chamber in the semiconductor fabrication facility. The gas purifier includes a getter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between the inlet and the outlet. Getter material which purifies gas flowing therethrough by sorbing impurities therefrom is disposed in the vessel. A first temperature sensor is disposed in a top portion of the getter material. The first temperature sensor is located in a melt zone to detect rapidly the onset of an exothermic reaction which indicates the presence of excess impurities in the incoming gas to be purified. A second temperature sensor is disposed in a bottom portion of the getter material. The second temperature sensor is located in a melt zone to detect rapidly the onset of an exothermic reaction which indicates that excess impurities are being backfed into the getter column. First and second high melting point, nonmetallic liners are disposed in the vessel such that at least some of the top and bottom portions, respectively, of the getter material is separated from the containment wall of the vessel. A getter-based gas purifier, a method of making an integrated circuit device, and a method of protecting a getter column are also described.
32 Citations
34 Claims
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1. A semiconductor manufacturing system, comprising:
a getter-based gas purifier coupled in flow communication with a gas distribution network for a semiconductor fabrication facility, said gas distribution network supplying purified gas to at least one wafer processing chamber in said semiconductor fabrication facility, wherein said gas purifier comprises; a getter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between said inlet and said outlet, the getter column further having a first high melting point, nonmetallic liner disposed in the vessel such that at least some of the top portion of getter material disposed in said vessel is separated from the containment wall of the vessel and a second high melting point, nonmetallic liner disposed in the vessel such that at least some of the bottom portion of the getter material is separated from the containment wall of the vessel; a first temperature sensor disposed in a top portion of said getter material, said first temperature sensor being located in a melt zone; and a second temperature sensor disposed in a bottom portion of said getter material, said second temperature sensor being located in a melt zone. - View Dependent Claims (2, 3, 4, 5)
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6. A semiconductor manufacturing system, comprising:
a getter-based gas purifier coupled in flow communication with a gas distribution network for a semiconductor fabrication facility, said gas distribution network supplying purified gas to at least one wafer processing chamber in said semiconductor fabrication facility, wherein said gas purifier comprises; a getter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between said inlet and said outlet; getter material disposed in said vessel; a first high melting point, nonmetallic liner disposed in said vessel such that a top portion of said getter material is separated from said containment wall of said vessel; a first temperature sensor disposed in said top portion of said getter material, said first temperature sensor being located about 0.5 inch to about 2.5 inches below the top surface of the getter material; a second high melting point, nonmetallic liner disposed in said vessel such that a bottom portion of said getter material is separated from said containment wall of said vessel; and a second temperature sensor disposed in said bottom portion of said getter material, said second temperature sensor being located about 0.5 inch to about 2.5 inches above the bottom surface of the getter material. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A semiconductor manufacturing system, comprising:
a getter-based gas purifier coupled in flow communication with a gas distribution network for a semiconductor fabrication facility, said gas distribution network supplying purified gas to at least one wafer processing chamber in said semiconductor fabrication facility, wherein said gas purifier comprises; a setter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between said inlet and said outlet, wherein said getter column further includes an upper high melting point, nonmetallic liner disposed in said vessel such that at least some of the top portion of said getter material is separated from said containment wall of said vessel; getter material disposed in said vessel; a first temperature sensor that is a thermocouple element, the first temperature sensor disposed in a top portion of said getter material, said first temperature sensor being located a distance below a top surface of said getter material, said distance being from just above 0 inches to just below 3 inches; a second temperature sensor that is a thermocouple element, the second temperature sensor disposed in a bottom portion of said getter material;
said second temperature sensor being located a distance above a bottom surface of said getter material, said distance being from just above 0 inches to just below 3 inches; anda lower high melting point, nonmetallic liner disposed in said vessel such that at least some of said bottom portion of said getter material is separated from said containment wall of said vessel. - View Dependent Claims (14, 15)
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16. A semiconductor manufacturing system, comprising:
a getter-based gas purifier coupled in flow communication with a gas distribution network for a semiconductor fabrication facility said gas distribution network supplying purified gas to at least one wafer processing chamber in said semiconductor fabrication facility, wherein said gas purifier comprises; a getter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between said inlet and said outlet; getter material disposed in said vessel; a first temperature sensor that is a thermocouple element, the first temperature sensor disposed in a top portion of said getter material, said first temperature sensor being located a distance below a top surface of said getter material, said distance being from just above 0 inches to just below 3 inches; a second temperature sensor that is a thermocouple element, the second temperature sensor disposed in a bottom portion of said getter material;
said second temperature sensor being located a distance above a bottom surface of said getter material, said distance being from just above 0 inches to just below 3 inches;a lower high melting point. nonmetallic liner disposed in said vessel such that at least some of said bottom portion of said getter material is separated from said containment wall of said vessel; and a control unit coupled to said first and second temperature sensors for measuring temperatures sensed by said first and second temperature sensors, said control unit actuating at least one isolation valve to isolate said getter column when a first alarm temperature is measured and actuating a vent valve to vent gas from said getter column when a second alarm temperature is measured.
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17. A getter-based gas purifier, comprising:
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a getter column having a metallic vessel with an inlet, an outlet, and a containment wall extending between said inlet and said outlet, said vessel having getter material disposed therein; a first isolation valve in flow communication with said inlet of said vessel; a vent valve in flow communication with said inlet of said vessel; a second isolation valve in flow communication with said outlet of said vessel; a first temperature sensor disposed in a top portion of said getter material; a second temperature sensor disposed in a bottom portion of said getter material; and a control unit coupled to said first and second temperature sensors, said first and second isolation valves, and said vent valve, wherein said control unit measures temperatures sensed by said first and second temperature sensors and, when a temperature above a first alarm temperature is measured, actuates said first and second isolation valves to isolate said getter column and, when a temperature above a second alarm temperature is measured, actuates said vent valve to vent gas from said getter column. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification