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:
Apr. 24, 2012
Filed:
Mar. 08, 2010
Kei Hirata, Tokyo, JP;
Atsushi Yamaguchi, Tokyo, JP;
Masaya Kato, Tokyo, JP;
Hideyuki Ukita, Tokyo, JP;
Kenkichi Anagawa, Tokyo, JP;
Minoru Ota, Tokyo, JP;
Kei Hirata, Tokyo, JP;
Atsushi Yamaguchi, Tokyo, JP;
Masaya Kato, Tokyo, JP;
Hideyuki Ukita, Tokyo, JP;
Kenkichi Anagawa, Tokyo, JP;
Minoru Ota, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A perpendicular magnetic write head is provided with a magnetic pole and a pair of side shields disposed on both sides of the magnetic pole in a cross track direction with side gaps in between. Each of the pair of side shields is configured in such a manner that a saturation magnetic flux density thereof increases as a distance from the magnetic pole in the cross track direction increases. Such a configuration allows unwanted divergence component of magnetic flux in a recording magnetic field to be captured while avoiding any excessive capturing of the recording magnetic field, and while preventing any intensity reduction of the recording magnetic field in its entirety. As a result, the recording magnetic field is maintained to have an adequate intensity and spreading of the recording magnetic field is suppressed, so that the recording capabilities are improved.