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. 07, 2008
Filed:
Mar. 31, 2006
Yuichi Watabe, Tokyo, JP;
Susumu Aoki, Tokyo, JP;
Reiichi Kurumisawa, Tokyo, JP;
Yasuyuki Notsuke, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
Yuichi Watabe, Tokyo, JP;
Susumu Aoki, Tokyo, JP;
Reiichi Kurumisawa, Tokyo, JP;
Yasuyuki Notsuke, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A perpendicular magnetic recording head capable of minimizing the possibility of erasing recorded information without intention at the time of recording information is provided. A pole layer has a structure in which a main pole layer disposed on a leading side and an auxiliary pole layer disposed on a trailing side are laminated. Even if a part of a magnetic flux contained in the auxiliary pole layer is directly emitted from an air bearing surface to outside not via the main pole layer, as the magnetic flux is contained in the magnetic layer, the magnetic flux is not easily emitted from the air bearing surface to the outside directly. Therefore, an unnecessary perpendicular magnetic field is not easily generated by the magnetic flux. Thereby, a recording medium is not easily magnetized again by the unnecessary magnetic field, so information recorded on the recording medium is not easily erased without intention.