The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2010
Filed:
Jan. 31, 2008
Yoshiaki Uji, Tokyo, JP;
Minoru Shimada, Kanagawa, JP;
Ryoh Miura, Kanagawa, JP;
Takahiro Watanabe, Kanagawa, JP;
Toyomi Ohsawa, Kanagawa, JP;
Noriaki Satoh, Kanagawa, JP;
Yoshiaki Uji, Tokyo, JP;
Minoru Shimada, Kanagawa, JP;
Ryoh Miura, Kanagawa, JP;
Takahiro Watanabe, Kanagawa, JP;
Toyomi Ohsawa, Kanagawa, JP;
Noriaki Satoh, Kanagawa, JP;
Hitachi Global Storage Technologies, Netherlands, B.V., Amsterdam, NL;
Abstract
Embodiments of the present invention allow for a precise altitude to be calculated from read-out signals of a head slider. In one embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) determines a head element portion in which the instability has occurred in accordance with the resolution change. The HDC/MPU adjusts the clearance accordingly. The head element portion reads signals of different frequencies under a condition of the signal strengths coinciding with a reference value, and the HDC/MPU calculates the resolution. The HDC/MPU determines that the instability has occurred if the difference is outside the criterion. The HDC/MPU uses the read-out signal of a head slider in which the instability has not occurred to calculate the altitude.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile