Patents by Inventor Chris Gimenez

Chris Gimenez 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).

  • Write current and fly height adjustment for compensating media coercivity variation
    Patent number: 9025263
    Abstract: A data storage device with compensation for coercivity variations in a magnetic disk storage medium is disclosed. Two procedures are executed to perform the coercivity compensation. In a first procedure, typically performed prior to writing of data, the coercivity at a number of locations on the disk is measured and stored. A second procedure writes data to locations on a magnetic disk storage medium having varying coercivities. To maintain writing widths within predefined limits, a writing parameter is varied according to a predetermined relationship between the value of the writing parameter and the coercivity. Choices of writing parameter comprise the writing current and fly height. The method may be employed for both data writing and self-servo writing of servo patterns.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: May 5, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Abhishek Dhanda, Chris Gimenez, Toshiki Hirano, Tetsuo Semba
  • WRITE CURRENT AND FLY HEIGHT ADJUSTMENT FOR COMPENSATING MEDIA COERCIVITY VARIATION
    Publication number: 20150036235
    Abstract: A data storage device with compensation for coercivity variations in a magnetic disk storage medium is disclosed. Two procedures are executed to perform the coercivity compensation. In a first procedure, typically performed prior to writing of data, the coercivity at a number of locations on the disk is measured and stored. A second procedure writes data to locations on a magnetic disk storage medium having varying coercivities. To maintain writing widths within predefined limits, a writing parameter is varied according to a predetermined relationship between the value of the writing parameter and the coercivity. Choices of writing parameter comprise the writing current and fly height. The method may be employed for both data writing and self-servo writing of servo patterns.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 5, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Abhishek Dhanda, Chris Gimenez, Toshiki Hirano, Tetsuo Semba