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).

  • Publication number: 20070126023
    Abstract: Lateral epitaxial overgrowth (LEO) of non-polar gallium nitride (GaN) films results in significantly reduced defect density.
    Type: Application
    Filed: February 1, 2007
    Publication date: June 7, 2007
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin Haskell, Michael Craven, Paul Fini, Steven DenBaars, James Speck, Shuji Nakamura
  • Patent number: 7220324
    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: March 10, 2006
    Date of Patent: May 22, 2007
    Assignee: The Regents of the University of California
    Inventors: Troy J. Baker, Benjamin A. Haskell, Paul T. Fini, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Patent number: 7220658
    Abstract: Lateral epitaxial overgrowth (LEO) of non-polar a-plane gallium nitride (GaN) films by hydride vapor phase epitaxy (HVPE) results in significantly reduced defect density.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: May 22, 2007
    Assignee: The Regents of the University of California
    Inventors: Benjamin A Haskell, Michael D. Craven, Paul T. Fini, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Publication number: 20070111488
    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: January 9, 2007
    Publication date: May 17, 2007
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Arpan Chakraborty, Benjamin Haskell, Stacia Keller, James Speck, Steven DenBaars, Shuji Nakamura, Umesh Mishra
  • Publication number: 20070111531
    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: January 9, 2007
    Publication date: May 17, 2007
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Troy Baker, Benjamin Haskell, Paul Fini, Steven DenBaars, James Speck, Shuji Nakamura
  • Publication number: 20070093073
    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: Application
    Filed: June 1, 2006
    Publication date: April 26, 2007
    Inventors: Robert Farrell, Troy Baker, Arpan Chakraborty, Benjamin Haskell, P. Pattison, Rajat Sharma, Umesh Mishra, Steven DenBaars, James Speck, Shuji Nakamura
  • Patent number: 7208393
    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: Grant
    Filed: May 31, 2005
    Date of Patent: April 24, 2007
    Assignee: The Regents of the University of California
    Inventors: Benjamin A. Haskell, Melvin B. McLaurin, Steven P. DenBaars, James Stephen Speck, Shuji Nakamura
  • Patent number: 7186302
    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: May 6, 2005
    Date of Patent: March 6, 2007
    Assignees: The Regents of the University of California, The Agency of Industrial Science and Technology
    Inventors: Arpan Chakraborty, Benjamin A. Haskell, Stacia Keller, James Stephen Speck, Steven P. Denbaars, Shuji Nakamura, Umesh Kumar Mishra
  • Publication number: 20070015345
    Abstract: A lateral growth method for defect reduction of semipolar nitride films. The process steps include selecting a semipolar nitride plane and composition, selecting a suitable substrate for growth of the semipolar nitride plane and composition, and applying a selective growth process in which the semipolar nitride nucleates on some areas of the substrate at the exclusion of other areas of the substrate, wherein the selective growth process includes lateral growth of nitride material by a lateral epitaxial overgrowth (LEO), sidewall lateral epitaxial overgrowth (SLEO), cantilever epitaxy or nanomasking.
    Type: Application
    Filed: July 13, 2006
    Publication date: January 18, 2007
    Inventors: Troy Baker, Benjamin Haskell, James Speck, Shuji Nakamura
  • Publication number: 20060246722
    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: Application
    Filed: April 13, 2006
    Publication date: November 2, 2006
    Inventors: James Speck, Benjamin Haskell, P. Pattison, Troy Baker
  • Publication number: 20060234486
    Abstract: A method of fabricating free-standing (Al, In, Ga)N substrates, by in situ separation of thick epitaxially grown nitride films from their foreign substrates. A suitable substrate for (Al, In, Ga)N film growth is selected, and foreign ions are implanted in the substrate to form a comparatively sharp concentration profile. An (Al, In Ga)N film is deposited on the substrate, and the deposited film is cooled to introduce thermal expansion mismatch-related strain, so that the film spontaneously separates from the substrate.
    Type: Application
    Filed: April 13, 2006
    Publication date: October 19, 2006
    Inventors: James Speck, Troy Baker, Benjamin Haskell
  • Publication number: 20060205199
    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: March 10, 2006
    Publication date: September 14, 2006
    Inventors: Troy Baker, Benjamin Haskell, Paul Fini, Steven DenBaars, James Speck, Shuji Nakamura
  • Publication number: 20060128124
    Abstract: Lateral epitaxial overgrowth (LEO) of non-polar a-plane gallium nitride (GaN) films by hydride vapor phase epitaxy (HVPE) results in significantly reduced defect density.
    Type: Application
    Filed: July 15, 2003
    Publication date: June 15, 2006
    Inventors: Benjamin Haskell, Michael Craven, Paul Fini, Steven DenBaars, James Speck, Shuji Nakamura
  • Publication number: 20060008941
    Abstract: Highly planar non-polar a-plane GaN films are grown by hydride vapor phase epitaxy (HVPE).
    Type: Application
    Filed: July 15, 2003
    Publication date: January 12, 2006
    Applicant: BASF Aktiengesellschaft
    Inventors: Benjamin Haskell, Paul Fini, Shigemasa Matsuda, Michael Craven, Steven DenBaars, James Speck, Shuji Nakamura
  • Publication number: 20050245095
    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: May 31, 2005
    Publication date: November 3, 2005
    Applicant: The Regents of the University of California
    Inventors: Benjamin Haskell, Melvin McLaurin, Steven DenBaars, James Speck, Shuji Nakamura
  • Publication number: 20050214992
    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: May 6, 2005
    Publication date: September 29, 2005
    Inventors: Arpan Chakraborty, Benjamin Haskell, Stacia Keller, James Speck, Steven Denbaars, Shuji Nakamura, Umesh Mishra