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:
May. 30, 2006
Filed:
Jan. 31, 2003
Kazue Kudo, Odawara, JP;
Yoshiaki Kawato, Tokyo, JP;
Kazuhiro Nakamoto, Odawara, JP;
Nobuo Yoshida, Odawara, JP;
Kimitoshi Etoh, Odawara, JP;
Kazue Kudo, Odawara, JP;
Yoshiaki Kawato, Tokyo, JP;
Kazuhiro Nakamoto, Odawara, JP;
Nobuo Yoshida, Odawara, JP;
Kimitoshi Etoh, Odawara, JP;
Hitachi Global Storage Technologies Japan, Ltd., Kanagawa-ken, JP;
Abstract
Disclosed herein is a magnetic head for perpendicular recording in which the main magnetic pole has reduced remanent magnetization and is less liable to cause erasure after recording. These characteristic properties were realized by constructing the magnetic head such that the recording magnetic pole and the yoke are separate from each other and the main magnetic pole is formed from a material with a high saturation magnetic flux density and the yoke is formed from a material having a negative magnetostriction constant.