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. 04, 2005
Filed:
Dec. 13, 2002
Yoshikazu Sato, Chuo-ku, JP;
Yuko Motegi, Fukaya, JP;
Tetsuya Roppongi, Chuo-ku, JP;
Yasuyuki Notsuke, Chuo-ku, JP;
Yoshikazu Sato, Chuo-ku, JP;
Yuko Motegi, Fukaya, JP;
Tetsuya Roppongi, Chuo-ku, JP;
Yasuyuki Notsuke, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
Provided is a thin film magnetic head capable of ensuring the strength of a perpendicular magnetic field and improving recording performance. A bottom pole portion layer and a top pole portion layer constituting a part of a main magnetic pole are formed so that a cross sectional area of a complex including front end portions of the bottom pole portion layer and the top pole portion layer is smaller than a cross sectional area of a complex including rear end portions thereof, and a width of a top edge in an exposed surface is larger than a width of a bottom edge, and is equal to or larger than a width of the exposed surface in a middle position between the top edge and the bottom edge. In recording, magnetic fluxes flowing in a main magnetic pole are focused toward an air bearing surface, and are concentrated on the front end portion of the top pole portion layer which is a main emitting portion of the magnetic fluxes, so sufficient magnetic fluxes can be supplied to the air bearing surface.