Patents by Inventor Alice Okabe

Alice Okabe 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).

  • Method and system for manufacturing a hard-disk drive
    Patent number: 8009381
    Abstract: A method for manufacturing a hard-disk drive (HDD). The method for manufacturing a HDD includes writing servo tracks, and writing servo tracks into the HDD using a calculated control target value of a calculated servo pattern overlap amount. Writing servo tracks includes a first, second, third and fourth operation. The first operation includes: producing a first control equation for obtaining a servo pattern overlap amount; and, converting a root-mean-square error (RMSE) into a probability distribution. The second operation includes calculating a second control target value that results in an increased product yield, from the RMSE probability distribution. The third operation includes producing a second control equation for obtaining a calculated servo pattern overlap amount, by assigning the second control target value into the first control equation.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: August 30, 2011
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventors: Yoshiteru Katsumura, Yasunori Nishimoto, Alice Okabe, Hiroshi Fukuyama
  • METHOD AND SYSTEM FOR MANUFACTURING A HARD-DISK DRIVE
    Publication number: 20110072644
    Abstract: A method for manufacturing a hard-disk drive (HDD). The method for manufacturing a HDD includes writing servo tracks, and writing servo tracks into the HDD using a calculated control target value of a calculated servo pattern overlap amount. Writing servo tracks includes a first, second, third and fourth operation. The first operation includes: producing a first control equation for obtaining a servo pattern overlap amount; and, converting a root-mean-square error (RMSE) into a probability distribution. The second operation includes calculating a second control target value that results in an increased product yield, from the RMSE probability distribution. The third operation includes producing a second control equation for obtaining a calculated servo pattern overlap amount, by assigning the second control target value into the first control equation.
    Type: Application
    Filed: December 10, 2009
    Publication date: March 31, 2011
    Inventors: Yoshiteru Katsumura, Yasunori Nishimoto, Alice Okabe, Hiroshi Fukuyama