Patents Assigned to Applied Science & Technology, Inc.
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Patent number: 6924455Abstract: A material processing apparatus having an integrated toroidal plasma source is described. The material processing apparatus includes a plasma chamber that comprises a portion of an outer surface of a process chamber. A transformer having a magnetic core surrounds a portion of the plasma chamber. The transformer has a primary winding. A solid state AC switching power supply comprising one or more switching semiconductor devices is coupled to a voltage supply and has an output that is coupled to the primary winding. The solid state AC switching power supply drives an AC current in the primary winding that induces an AC potential inside the chamber that directly forms a toroidal plasma that completes a secondary circuit of the transformer and dissociates the gas.Type: GrantFiled: January 26, 2001Date of Patent: August 2, 2005Assignee: Applied Science & Technology, Inc.Inventors: Xing Chen, Donald K. Smith, William M. Holber
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Patent number: 6815633Abstract: Apparatus for dissociating gases includes a plasma chamber comprising a gas. A first transformer having a first magnetic core surrounds a first portion of the plasma chamber and has a first primary winding. A second transformer having a second magnetic core surrounds a second portion of the plasma chamber and has a second primary winding. A first solid state AC switching power supply including one or more switching semiconductor devices is coupled to a first voltage supply and has a first output that is coupled to the first primary winding. A second solid state AC switching power supply including one or more switching semiconductor devices is coupled to a second voltage supply and has a second output that is coupled to the second primary winding. The first solid state AC switching power supply drives a first AC current in the first primary winding. The second solid state AC switching power supply drives a second AC current in the second primary winding.Type: GrantFiled: March 12, 2001Date of Patent: November 9, 2004Assignee: Applied Science & Technology, Inc.Inventors: Xing Chen, William M. Holber, Andrew Barnett Cowe, Eric Georgelis, Ilya M. Bystyak, Andrzej Bortkiewicz
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Publication number: 20040079287Abstract: An apparatus for dissociating gases includes a plasma chamber that may be formed from a metallic material and a transformer having a magnetic core surrounding a portion of the plasma chamber and having a primary winding. The apparatus also includes one or more switching semiconductor devices that are directly coupled to a voltage supply and that have an output coupled to the primary winding of the transformer. The one or more switching semiconductor devices drive current in the primary winding that induces a potential inside the chamber that forms a plasma which completes a secondary circuit of the transformer.Type: ApplicationFiled: October 20, 2003Publication date: April 29, 2004Applicant: Applied Science & Technology, Inc.Inventors: Donald K. Smith, Xing Chen, William M. Holber, Eric Georgelis
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Publication number: 20030164338Abstract: The invention features an apparatus and a method for supplying ozonated water to more than one process tool. Ozonated water of a first concentration received from an ozonated water generator and water received from a source are mixed to produce ozonated water of a second concentration. The ozonated water of a second concentration is supplied to a first process tool. Ozonated water from the ozonated water generator is supplied to a second process tool while supplying the ozonated water of the second concentration to the first process tool.Type: ApplicationFiled: April 26, 2002Publication date: September 4, 2003Applicant: Applied Science & Technology, Inc.Inventors: Jens Fittkau, Johannes Seiwert, Christiane Gottschalk
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Patent number: 6559408Abstract: An apparatus for dissociating gases includes a plasma chamber that may be formed from a metallic material and a transformer having a magnetic core surrounding a portion of the plasma chamber and having a primary winding. The apparatus also includes one or more switching semiconductor devices that are directly coupled to a voltage supply and that have an output coupled to the primary winding of the transformer. The one or more switching semiconductor devices drive current in the primary winding that induces a potential inside the chamber that forms a plasma which completes a secondary circuit of the transformer.Type: GrantFiled: May 10, 2002Date of Patent: May 6, 2003Assignee: Applied Science & Technology, Inc.Inventors: Donald K. Smith, Xing Chen, William M. Holber, Eric Georgelis
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Patent number: 6486431Abstract: An apparatus for dissociating gases includes a plasma chamber that may be formed from a metallic material and a transformer having a magnetic core surrounding a portion of the plasma chamber and having a primary winding. The apparatus also includes one or more switching semiconductor devices that are directly coupled to a voltage supply and that have an output coupled to the primary winding of the transformer. The one or more switching semiconductor devices drive current in the primary winding that induces a potential inside the chamber that forms a plasma which completes a secondary circuit of the transformer.Type: GrantFiled: September 12, 2000Date of Patent: November 26, 2002Assignee: Applied Science & Technology, Inc.Inventors: Donald K. Smith, Xing Chen, William M. Holber, Eric Georgelis
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Publication number: 20020125226Abstract: An apparatus for dissociating gases includes a plasma chamber that may be formed from a metallic material and a transformer having a magnetic core surrounding a portion of the plasma chamber and having a primary winding. The apparatus also includes one or more switching semiconductor devices that are directly coupled to a voltage supply and that have an output coupled to the primary winding of the transformer. The one or more switching semiconductor devices drive current in the primary winding that induces a potential inside the chamber that forms a plasma which completes a secondary circuit of the transformer.Type: ApplicationFiled: May 10, 2002Publication date: September 12, 2002Applicant: Applied Science & Technology, Inc.Inventors: Donald K. Smith, Xing Chen, William M. Holber, Eric Georgelis
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Publication number: 20020125225Abstract: An apparatus for dissociating gases includes a plasma chamber that may be formed from a metallic material and a transformer having a magnetic core surrounding a portion of the plasma chamber and having a primary winding. The apparatus also includes one or more switching semiconductor devices that are directly coupled to a voltage supply and that have an output coupled to the primary winding of the transformer. The one or more switching semiconductor devices drive current in the primary winding that induces a potential inside the chamber that forms a plasma which completes a secondary circuit of the transformer.Type: ApplicationFiled: May 10, 2002Publication date: September 12, 2002Applicant: Applied Science & Technology, Inc.Inventors: Donald K. Smith, Xing Chen, William M. Holber, Eric Georgelis
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Patent number: 5637279Abstract: A generator cell includes a high voltage assembly having a high voltage electrode, a low voltage assembly having a low voltage electrode, a barrier dielectric between the electrodes defining a discharge region for producing a reactive gas, and a welded seal joining the assemblies to create a permanently sealed chamber between the assemblies including the discharge region. The generator cell may have a gap in the discharge region of 0.005 inch or less. The cells may be modularly combined to form a reactive gas generator system.Type: GrantFiled: August 31, 1994Date of Patent: June 10, 1997Assignee: Applied Science & Technology, Inc.Inventors: Matthew M. Besen, Donald K. Smith
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Patent number: 4866346Abstract: A microwave plasma generator for producing an axisymmetric plasma, having a waveguide apparatus, means for introducing a microwave source into the waveguide apparatus, and means for generating a circular axisymmetric microwave field from the microwave source. There are means for tuning the field to match the impedance of a plasma load. Further included is a vacuum chamber for containing a gas to be ionized to form the plasma, means for introducing this gas into the vacuum chamber, and means for coupling the microwave field to the vacuum chamber to form the plasma.Type: GrantFiled: June 22, 1987Date of Patent: September 12, 1989Assignee: Applied Science & Technology, Inc.Inventors: Marcel P. J. Gaudreau, Donald K. Smith
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Patent number: 4851630Abstract: A microwave reactive gas generator including a microwave power source with a waveguide coupled to the power source for transmitting microwave radiation. A cavity for establishing a microwave mode is attached to the waveguide, and there is passage tube through the cavity transverse to the direction of propagation of the microwave radiation in the waveguide for passing the gas to be excited through the cavity. The generator also includes a device for matching the impedance of the load to the microwave power source. The cavity couples the microwave power from the waveguide to the passage to energize the gas into a reactive state.Type: GrantFiled: June 23, 1988Date of Patent: July 25, 1989Assignee: Applied Science & Technology, Inc.Inventor: Donald K. Smith