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:
Oct. 15, 2002
Filed:
Nov. 03, 2000
Sachiyo Baba, Yamato, JP;
Hiroyasu Tsuchida, Yokohama, JP;
Shunichiro Ota, Machida, JP;
Toyomi Ohsawa, Kawasak, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention relates to controlling the flying height of a magnetic head or slider relative to a magnetic disk in a disk storage device. The flying height of the negative pressure slider is not affected by changes in temperature. By controlling a ratio of crown sensitivity of the flying height to camber sensitivity of the flying height, changes in flying height due to the crown change of the slider corresponding to temperature changes are canceled. It is necessary to set a ratio of the area of a reverse step surface, R, to the area of a center rail, C, within a range of 2:1 to 6:1 (preferably 4:1 to 6:1; ideally 5:1). Then, setting can be performed so that the center of the substantially negative pressure generated may be the center of the slider surface.