Patents by Inventor Mukund Channagiri Rao

Mukund Channagiri Rao 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: 7387848
    Abstract: A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone; and forming a pattern of recesses in the substrate surface in said CSS or landing zone by embossing utilizing a stamper having a surface including a negative image pattern of said pattern of recesses. Embodiments of the invention include magnetic media comprising a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses. In addition, the data zone of the substrate surface may include an embossed servo pattern formed simultaneously with the embossed pattern of recesses formed in the landing zone.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: June 17, 2008
    Assignee: Seagate Technology LLC
    Inventors: James Edward Angelo, Mukund Channagiri Rao, Alexei Hiram Sacks, Timothy Francis Ellis, David Kuo, Serge Jacques Fayeulle
  • Patent number: 6878426
    Abstract: A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone; and forming a pattern of recesses in the substrate surface in said CSS or landing zone by embossing utilizing a stamper having a surface including a negative image pattern of said pattern of recesses. Embodiments of the invention include magnetic media comprising a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses. In addition, the data zone of the substrate surface may include an embossed servo pattern formed simultaneously with the embossed pattern of recesses formed in the landing zone.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: April 12, 2005
    Assignee: Seagate Technology LLC
    Inventors: James Edward Angelo, Mukund Channagiri Rao, Alexei Hiram Sacks, Timothy Francis Ellis, David Kuo, Serge Jacques Fayeulle
  • Publication number: 20040058060
    Abstract: A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone; and forming a pattern of recesses in the substrate surface in said CSS or landing zone by embossing utilizing a stamper having a surface including a negative image pattern of said pattern of recesses. Embodiments of the invention include magnetic media comprising a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses. In addition, the data zone of the substrate surface may include an embossed servo pattern formed simultaneously with the embossed pattern of recesses formed in the landing zone.
    Type: Application
    Filed: September 25, 2003
    Publication date: March 25, 2004
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: James Edward Angelo, Mukund Channagiri Rao, Alexi Hiram Sacks, Timothy Francis Ellis, David Kuo, Serge Jacques Fayeulle
  • Publication number: 20040050480
    Abstract: A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone; and forming a pattern of recesses in the substrate surface in said CSS or landing zone by embossing utilizing a stamper having a surface including a negative image pattern of said pattern of recesses. Embodiments of the invention include magnetic media comprising a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses. In addition, the data zone of the substrate surface may include an embossed servo pattern formed simultaneously with the embossed pattern of recesses formed in the landing zone.
    Type: Application
    Filed: August 18, 2003
    Publication date: March 18, 2004
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: James Edward Angelo, Mukund Channagiri Rao, Alexi Hiram Sacks, Timothy Francis Ellis, David Kuo, Serge Jacques Fayeulle
  • Patent number: 6627254
    Abstract: A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone; and forming a pattern of recesses in the substrate surface in said CSS or landing zone by embossing utilizing a stamper having a surface including a negative image pattern of said pattern of recesses. Embodiments of the invention include magnetic media comprising a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses. In addition, the data zone of the substrate surface may include an embossed servo pattern formed simultaneously with the embossed pattern of recesses formed in the landing zone.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: September 30, 2003
    Assignee: Seagate Technology LLC
    Inventors: James Edward Angelo, Mukund Channagiri Rao, Alexei Hiram Sacks, Timothy Francis Ellis, David Kuo, Serge Jacques Fayeulle
  • Patent number: 6050127
    Abstract: An apparatus and method for impact response testing of materials such as magnetic discs of a disc drive. The apparatus of the present invention supports a target disc in cooperative relationship with a sub-millimeter impact test ball such that the test ball can be dropped on selected portions of the target disc from selected heights above the target disc. The apparatus permits the method of observing the characteristics of a detent made in the target disc, by use of a high resolution surface profiler, and interpolating the observed characteristics to analytical standards which, for a given test ball size and drop height, indicate the dynamic hardness of the target disc at that test location. A vacuum is used to support the test ball above the disc, and a vacuum release valve is provided to negate the vacuum and release the test ball.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: April 18, 2000
    Assignee: Seagate Technology, Inc.
    Inventors: Mukund Channagiri Rao, Harold Weaver Pexton