Patents by Inventor Benjamin A. Haskell

Benjamin A. Haskell 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).

  • Patent number: 7846757
    Abstract: A method for growth and fabrication of semipolar (Ga,Al,In,B)N thin films, heterostructures, and devices, comprising identifying desired material properties for a particular device application, selecting a semipolar growth orientation based on the desired material properties, selecting a suitable substrate for growth of the selected semipolar growth orientation, growing a planar semipolar (Ga,Al,In,B)N template or nucleation layer on the substrate, and growing the semipolar (Ga,Al,In,B)N thin films, heterostructures or devices on the planar semipolar (Ga,Al,In,B)N template or nucleation layer. The method results in a large area of the semipolar (Ga,Al,In,B)N thin films, heterostructures, and devices being parallel to the substrate surface.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: December 7, 2010
    Assignees: The Regents of the University of California, Japan Science and Technology Agency
    Inventors: Robert M. Farrell, Jr., Troy J. Baker, Arpan Chakraborty, Benjamin A. Haskell, P. Morgan Pattison, Rajat Sharma, Umesh Kumar Mishra, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Patent number: 7847293
    Abstract: Lateral epitaxial overgrowth (LEO) of non-polar gallium nitride (GaN) films results in significantly reduced defect density.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: December 7, 2010
    Assignees: The Regents of the University of California, Japan Science and Technology Agency
    Inventors: Benjamin A. Haskell, Michael D. Craven, Paul T. Fini, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Patent number: 7795146
    Abstract: An etching technique for the fabrication of thin (Al, In, Ga)N layers. A suitable template or substrate is selected and implanted with foreign ions over a desired area to create ion implanted material. A regrowth of a device structure is then performed on the implanted template or substrate. The top growth surface of the template is bonded to a carrier wafer to created a bonded template/carrier wafer structure. The substrate is removed, as is any residual material, to expose the ion implanted material. The ion implanted material on the bonded template/carrier wafer structure is then exposed to a suitable etchant for a sufficient time to remove the ion implanted material.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: September 14, 2010
    Assignees: The Regents of the University of California, Japan Science and Technology Agency
    Inventors: James S. Speck, Benjamin A. Haskell, P. Morgan Pattison, Troy J. Baker
  • Publication number: 20100155778
    Abstract: A method for enhancing growth of device-quality planar semipolar nitride semiconductor thin films via metalorganic chemical vapor deposition (MOCVD) by using an (Al, In, Ga)N nucleation layer containing at least some indium. Specifically, the method comprises loading a substrate into a reactor, heating the substrate under a flow of nitrogen and/or hydrogen and/or ammonia, depositing an InxGa1-xN nucleation layer on the heated substrate, depositing a semipolar nitride semiconductor thin film on the InxGa1-xN nucleation layer, and cooling the substrate under a nitrogen overpressure.
    Type: Application
    Filed: March 3, 2010
    Publication date: June 24, 2010
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Hitoshi Sato, John F. Kaeding, Michael Iza, Troy J. Baker, Benjamin A. Haskell, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20100148195
    Abstract: A method for improved growth of a semipolar (Al,In,Ga,B)N semiconductor thin film using an intentionally miscut substrate. Specifically, the method comprises intentionally miscutting a substrate, loading a substrate into a reactor, heating the substrate under a flow of nitrogen and/or hydrogen and/or ammonia, depositing an InxGa1-xN nucleation layer on the heated substrate, depositing a semipolar nitride semiconductor thin film on the InxGa1-xN nucleation layer, and cooling the substrate under a nitrogen overpressure.
    Type: Application
    Filed: February 22, 2010
    Publication date: June 17, 2010
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: John F. Kaeding, Dong-Seon Lee, Michael Iza, Troy J. Baker, Hiroshi Sato, Benjamin A. Haskell, James S. Speck, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20100133663
    Abstract: A method for growing planar, semi-polar nitride film on a miscut spinel substrate, in which a large area of the planar, semi-polar nitride film is parallel to the substrate's surface.
    Type: Application
    Filed: February 1, 2010
    Publication date: June 3, 2010
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Troy J. Baker, Benjamin A. Haskell, Paul T. Fini, Steven P. DenBaars, James S. Speck, Shuji Nakamua
  • Patent number: 7704331
    Abstract: A method for growing planar, semi-polar nitride film on a miscut spinel substrate, in which a large area of the planar, semi-polar nitride film is parallel to the substrate's surface. The planar films and substrates are: (1) {10 11} gallium nitride (GaN) grown on a {100} spinel substrate miscut in specific directions, (2) {10 13} gallium nitride (GaN) grown on a {110} spinel substrate, (3) {11 22} gallium nitride (GaN) grown on a {1 100} sapphire substrate, and (4) {10 13} gallium nitride (GaN) grown on a {1 100} sapphire substrate.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: April 27, 2010
    Assignees: The Regents of the University of California, Japan Science and Technology Agency
    Inventors: Troy J. Baker, Benjamin A. Haskell, Paul T. Fini, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Patent number: 7691658
    Abstract: A method for improved growth of a semipolar (Al,In,Ga,B)N semiconductor thin film using an intentionally miscut substrate. Specifically, the method comprises intentionally miscutting a substrate, loading a substrate into a reactor, heating the substrate under a flow of nitrogen and/or hydrogen and/or ammonia, depositing an InxGa1?xN nucleation layer on the heated substrate, depositing a semipolar nitride semiconductor thin film on the InxGa1?xN nucleation layer, and cooling the substrate under a nitrogen overpressure.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: April 6, 2010
    Assignees: The Regents of the University of California, Japan Science and Technology Agency
    Inventors: John F. Kaeding, Dong-Seon Lee, Michael Iza, Troy J. Baker, Hitoshi Sato, Benjamin A. Haskell, James S. Speck, Steven P. DenBaars, Shuji Nakamura
  • Patent number: 7687293
    Abstract: A method for enhancing growth of device-quality planar semipolar nitride semiconductor thin films via metalorganic chemical vapor deposition (MOCVD) by using an (Al,In,Ga)N nucleation layer containing at least some indium. Specifically, the method comprises loading a substrate into a reactor, heating the substrate under a flow of nitrogen and/or hydrogen and/or ammonia, depositing an InxGa1-xN nucleation layer on the heated substrate, depositing a semipolar nitride semiconductor thin film on the InxGa1-xN nucleation layer, and cooling the substrate under a nitrogen overpressure.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: March 30, 2010
    Assignee: The Regents of the University of California
    Inventors: Hiroshi Sato, John F. Kaeding, Michael Iza, Troy J. Baker, Benjamin A. Haskell, Steven P. DenBaars, Shuji Nakamura
  • Patent number: 7575947
    Abstract: A method for growing a semi-polar nitride semiconductor thin film via metalorganic chemical vapor deposition (MOCVD) on a substrate, wherein a nitride nucleation or buffer layer is grown on the substrate prior to the growth of the semi-polar nitride semiconductor thin film.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: August 18, 2009
    Assignees: The Regents of the University of California, Japan Science and Technology Agency
    Inventors: Michael Iza, Troy J. Baker, Benjamin A. Haskell, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20090184342
    Abstract: A method for growing a semi-polar nitride semiconductor thin film via metalorganic chemical vapor deposition (MOCVD) on a substrate, wherein a nitride nucleation or buffer layer is grown on the substrate prior to the growth of the semi-polar nitride semiconductor thin film.
    Type: Application
    Filed: September 8, 2006
    Publication date: July 23, 2009
    Inventors: Michael Iza, Troy J. Baker, Benjamin A. Haskell, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20090146162
    Abstract: A method for the fabrication of nonpolar indium gallium nitride (InGaN) films as well as nonpolar InGaN-containing device structures using metalorganic chemical vapor deposition (MOVCD). The method is used to fabricate nonpolar InGaN/GaN violet and near-ultraviolet light emitting diodes and laser diodes.
    Type: Application
    Filed: February 12, 2009
    Publication date: June 11, 2009
    Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, THE JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Arpan Chakraborty, Benjamin A. Haskell, Stacia Keller, James Stephen Speck, Steven P. DenBaars, Shuji Nakamura, Umesh Kumar Mishra
  • Patent number: 7504274
    Abstract: A method for the fabrication of nonpolar indium gallium nitride (InGaN) films as well as nonpolar InGaN-containing device structures using metalorganic chemical vapor deposition (MOVCD). The method is used to fabricate nonpolar InGaN/GaN violet and near-ultraviolet light emitting diodes and laser diodes.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: March 17, 2009
    Assignees: The Regents of the University of California, The Japan Science and Technology Agency
    Inventors: Arpan Chakraborty, Benjamin A. Haskell, Stacia Keller, James S. Speck, Steven P. DenBaars, Shuji Nakamura, Umesh K. Mishra
  • Publication number: 20090001519
    Abstract: Growth methods for planar, non-polar, Group-III nitride films are described. The resulting films are suitable for subsequent device regrowth by a variety of growth techniques.
    Type: Application
    Filed: September 9, 2008
    Publication date: January 1, 2009
    Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, THE JAPAN SCIENCE AND TECHNOLOGY CENTER
    Inventors: Benjamin A. Haskell, Paul T. Fini, Shigemasa Matsuda, Michael D. Craven, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Publication number: 20080296626
    Abstract: The present invention provides nitride semiconductors having a moderate density of basal plane stacking faults and a reduced density of threading dislocations, various products based on, incorporating or comprising the nitride semiconductors, including without limitation substrates, template films, templates, heterostructures with or without integrated substrates, and devices, and methods for fabrication of templates and substrates comprising the nitride semiconductors.
    Type: Application
    Filed: May 28, 2008
    Publication date: December 4, 2008
    Inventors: Benjamin Haskell, Paul T. Fini
  • Patent number: 7427555
    Abstract: Highly planar non-polar GaN films are grown by hydride vapor phase epitaxy (HVPE). The resulting films are suitable for subsequent device regrowth by a variety of growth techniques.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: September 23, 2008
    Assignees: The Regents of the University of California, The Japan Science and Technology Agency
    Inventors: Benjamin A. Haskell, Paul T. Fini, Shigemasa Matsuda, Michael D. Craven, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Publication number: 20080083970
    Abstract: A method for growing III-nitride films containing aluminum using Hydride Vapor Phase Epitaxy (HVPE) is disclosed, and comprises using corrosion-resistant materials in an HVPE system, the region of the HVPE system containing the corrosion-resistant materials being an area that contacts an aluminum halide, heating a source zone with an aluminum-containing source above a predetermined temperature, and growing the III-nitride film containing aluminum within the HVPE system containing the corrosion-resistant material.
    Type: Application
    Filed: May 8, 2007
    Publication date: April 10, 2008
    Inventors: Derrick Kamber, Benjamin Haskell, Shuji Nakamura, Tadao Hashimoto
  • Publication number: 20070218703
    Abstract: A method for improved growth of a semipolar (Al,In,Ga,B)N semiconductor thin film using an intentionally miscut substrate. Specifically, the method comprises intentionally miscutting a substrate, loading a substrate into a reactor, heating the substrate under a flow of nitrogen and/or hydrogen and/or ammonia, depositing an InxGa1-xN nucleation layer on the heated substrate, depositing a semipolar nitride semiconductor thin film on the InxGa1-xN nucleation layer, and cooling the substrate under a nitrogen overpressure.
    Type: Application
    Filed: January 19, 2007
    Publication date: September 20, 2007
    Inventors: John Kaeding, Dong-Seon Lee, Michael Iza, Troy Baker, Hitoshi Sato, Benjamin Haskell, James Speck, Steven DenBaars, Shuji Nakamura
  • Publication number: 20070218655
    Abstract: A method for enhancing growth of device-quality planar semipolar nitride semiconductor thin films via metalorganic chemical vapor deposition (MOCVD) by using an (Al,In,Ga)N nucleation layer containing at least some indium. Specifically, the method comprises loading a substrate into a reactor, heating the substrate under a flow of nitrogen and/or hydrogen and/or ammonia, depositing an InxGa1?xN nucleation layer on the heated substrate, depositing a semipolar nitride semiconductor thin film on the InxGa1?xN nucleation layer, and cooling the substrate under a nitrogen overpressure.
    Type: Application
    Filed: January 19, 2007
    Publication date: September 20, 2007
    Inventors: Hitoshi Sato, John Kaeding, Michael Iza, Troy Baker, Benjamin Haskell, Steven DenBaars, Shuji Nakamura
  • Publication number: 20070184637
    Abstract: A method of growing highly planar, fully transparent and specular m-plane gallium nitride (GaN) films. The method provides for a significant reduction in structural defect densities via a lateral overgrowth technique. High quality, uniform, thick m-plane GaN films are produced for use as substrates for polarization-free device growth.
    Type: Application
    Filed: April 6, 2007
    Publication date: August 9, 2007
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin Haskell, Melvin McLaurin, Steven DenBaars, James Speck, Shuji Nakamura