Patents by Inventor Duane C. Karns

Duane C. Karns 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).

  • Multilevel data structure
    Patent number: 8395984
    Abstract: A method of performing writable optical recording of a medium to form multilevel oriented nano-structures therein, comprises steps of providing a disc-shaped, writable recording medium having a planar surface; and encoding data/information in the medium by forming a plurality of multilevel nano-structured pits in the surface by scanning with a focused spot of optical energy to form at least one data track therein, including scanning the optical spot in a cross-track direction while rotating the disc about a central axis.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: March 12, 2013
    Inventors: Duane C. Karns, Dieter K. Weller, William A. Challener, Edward Gage, David S. Kuo, Neil Deeman, Shih-Fu Lee, Koichi Wage
  • Thin film structure with controlled lateral thermal spreading in the thin film
    Patent number: 8149539
    Abstract: An apparatus includes a magnetic layer, a heat sink layer, and a thermal resistor layer between the magnetic layer and the heat sink layer. The apparatus may be configured as a thin film structure arranged for data storage. The apparatus may also include an interlayer positioned between the magnetic layer and the thermal resistor layer.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: April 3, 2012
    Assignee: Seagate Technology LLC
    Inventors: Bin Lu, Ganping A. Ju, Julius K. Hohlfeld, Duane C. Karns, Amit V. Itagi, William A. Challener, Hua Zhou
  • Thin Film Structure With Controlled Lateral Thermal Spreading In The Thin Film
    Publication number: 20110096432
    Abstract: An apparatus includes a magnetic layer, a heat sink layer, and a thermal resistor layer between the magnetic layer and the heat sink layer. The apparatus may be configured as a thin film structure arranged for data storage. The apparatus may also include an interlayer positioned between the magnetic layer and the thermal resistor layer.
    Type: Application
    Filed: December 8, 2010
    Publication date: April 28, 2011
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Bin Lu, Ganping Ju, Julius K. Hohlfeld, Duane C. Karns, Amit V. Itagi, William A. Challener, Hua Zhou
  • WRITEALE OPTICAL RECORDING OF MULTI-LEVEL ORIENTED NANO-STRUCTURE DISCS
    Publication number: 20110044147
    Abstract: A method of performing writable optical recording of a medium to form multilevel oriented nano-structures therein, comprises steps of providing a disc-shaped, writable recording medium having a planar surface; and encoding data/information in the medium by forming a plurality of multilevel nano-structured pits in the surface by scanning with a focused spot of optical energy to form at least one data track therein, including scanning the optical spot in a cross-track direction while rotating the disc about a central axis.
    Type: Application
    Filed: November 2, 2010
    Publication date: February 24, 2011
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Duane C. Karns, Dieter K. Weller, William A. Challener, Edward Gage, David S. Kuo, Neil Deeman, Shih-Fu Lee, Koichi Wago
  • Thin film structure with controlled lateral thermal spreading in the thin film
    Patent number: 7869162
    Abstract: An apparatus includes a magnetic layer, a heat sink layer, and a thermal resistor layer between the magnetic layer and the heat sink layer. The apparatus may be configured as a thin film structure arranged for data storage. The apparatus may also include an interlayer positioned between the magnetic layer and the thermal resistor layer.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: January 11, 2011
    Assignee: Seagate Technology LLC
    Inventors: Bin Lu, Ganping Ju, Julius K. Hohlfeld, Duane C. Karns, Amit V. Itagi, William A. Challener, Hua Zhou
  • Writeable optical recording of multilevel oriented nano-structure discs
    Patent number: 7830775
    Abstract: A method of performing writable optical recording of a medium to form multilevel oriented nano-structures therein, comprises steps of providing a disc-shaped, writable recording medium having a planar surface; and encoding data/information in the medium by forming a plurality of multilevel nano-structured pits in the surface by scanning with a focused spot of optical energy to form at least one data track therein, including scanning the optical spot in a cross-track direction while rotating the disc about a central axis.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: November 9, 2010
    Assignee: Seagate Technology LLC
    Inventors: Duane C. Karns, Dieter K. Weller, William A. Challener, Edward Gage, David S. Kuo, Neil Deeman, Shih-Fu Lee, Koichi Wago
  • Thin film structure with controlled lateral thermal spreading in the thin film
    Publication number: 20080198738
    Abstract: An apparatus includes a magnetic layer, a heat sink layer, and a thermal resistor layer between the magnetic layer and the heat sink layer. The apparatus may be configured as a thin film structure arranged for data storage. The apparatus may also include an interlayer positioned between the magnetic layer and the thermal resistor layer.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 21, 2008
    Applicant: Seagate Technology LLC
    Inventors: Bin Lu, Ganping Ju, Julius K. Hohlfeld, Duane C. Karns, Amit V. Itagi, William A. Challener, Hua Zhou