Patents by Inventor David S. Lyttle
David S. Lyttle has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11591714Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: November 30, 2020Date of Patent: February 28, 2023Assignee: GTAT CorporationInventors: Roman V. Drachev, Santhanaraghavan Parthasarathy, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 11505876Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: October 9, 2020Date of Patent: November 22, 2022Assignee: GTAT CORPORATIONInventors: Roman V. Drachev, Santhanaraghavan Parthasarathy, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 11434582Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: February 27, 2020Date of Patent: September 6, 2022Assignee: GTAT CorporationInventors: Roman V. Drachev, Santhanaraghavan Parthasarathy, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 11421343Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: September 15, 2020Date of Patent: August 23, 2022Assignee: GTAT CorporationInventors: Roman V. Drachev, Andriy M. Andrukhiv, David S. Lyttle, Santhanaraghavan Parthasarathy
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Publication number: 20210095392Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: September 15, 2020Publication date: April 1, 2021Inventors: Roman V. Drachev, Andriy M. Andrukhiv, David S. Lyttle, Santhanaraghavan Parthasarathy
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Publication number: 20210087706Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: November 30, 2020Publication date: March 25, 2021Inventors: Roman V. Drachev, Santhanaraghavan Parthasarathy, Andriy M. Andrukhiv, David S. Lyttle
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Publication number: 20210032770Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: October 9, 2020Publication date: February 4, 2021Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 10851473Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: September 5, 2014Date of Patent: December 1, 2020Assignee: GTAT CorporationInventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 10801126Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: September 5, 2014Date of Patent: October 13, 2020Assignee: GTAT CorporationInventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 10793971Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: September 5, 2014Date of Patent: October 6, 2020Assignee: GTAT CorporationInventors: Roman V. Drachev, Andriy M. Andrukhiv, David S. Lyttle, Parthasarathy Santhanaraghavan
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Publication number: 20200199777Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: February 27, 2020Publication date: June 25, 2020Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 10633762Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: September 5, 2014Date of Patent: April 28, 2020Assignee: GTAT Corporation.Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Patent number: 9512542Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: GrantFiled: September 5, 2014Date of Patent: December 6, 2016Assignee: GTAT CorporationInventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Publication number: 20150072101Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Publication number: 20150068446Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Inventors: Roman V. Drachev, Andriy M. Andrukhiv, David S. Lyttle, Parthasarathy Santhanaraghavan
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Publication number: 20150068447Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Publication number: 20150068445Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle
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Publication number: 20150068457Abstract: A method of producing silicon carbide is disclosed. The method comprises the steps of providing a sublimation furnace comprising a furnace shell, at least one heating element positioned outside the furnace shell, and a hot zone positioned inside the furnace shell surrounded by insulation. The hot zone comprises a crucible with a silicon carbide precursor positioned in the lower region and a silicon carbide seed positioned in the upper region. The hot zone is heated to sublimate the silicon carbide precursor, forming silicon carbide on the bottom surface of the silicon carbide seed. Also disclosed is the sublimation furnace to produce the silicon carbide as well as the resulting silicon carbide material.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Inventors: Roman V. Drachev, Parthasarathy Santhanaraghavan, Andriy M. Andrukhiv, David S. Lyttle