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. 30, 1999
Filed:
Oct. 13, 1998
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A magnetic disk drive has a magnetic head for recording or reproducing information on or from a magnetic recording medium. The magnetic recording medium includes a magnetic recording layer for information recording which has magnetic anisotropy in a direction perpendicular to a surface of the recording medium, a soft magnetic under layer under the magnetic recording layer and having soft magnetic properties, and a non-magnetic substrate. The magnetic disk drive records a signal with a skew angle on at least some tracks. A main pole has a size satisfying pL<(tP-tW cos .theta.)/sin .theta., where pL is a width of an end face of the main pole in a traveling direction, tW is a track width of the end face of the main pole, tP is a track pitch, and .theta. is a skew angle of a trailing edge of the main pole.