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:
Nov. 25, 2008
Filed:
Sep. 16, 2005
Yumi Nagano, Kanagawa, JP;
Michio Nakajima, Kanagawa, JP;
Toyomi Ohsawa, Kanagawa, JP;
Masato Taniguchi, Kanagawa, JP;
Yumi Nagano, Kanagawa, JP;
Michio Nakajima, Kanagawa, JP;
Toyomi Ohsawa, Kanagawa, JP;
Masato Taniguchi, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., AZ Amsterdam, NL;
Abstract
Embodiments of the invention make it possible to conduct stable recording on a magnetic disk, even in case of changes in flying height due to thermal protrusion. In one embodiment, a compensatory recording current value Ais used when a first section of user data is recorded in the required number of data sectors from the data sector of the starting address for recording the user data to the data sector of an intermediate address. A recording current value Asmaller than the compensatory recording current value is used when a second section of user data is recorded in the data sectors existing from the data sector of the intermediate address towards the ending address.