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. 19, 2005
Filed:
Dec. 14, 2001
Kiyoshi Sato, Niigata-ken, JP;
Hideki Gochou, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Akira Koyama, Niigata-ken, JP;
Kiyoshi Sato, Niigata-ken, JP;
Hideki Gochou, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Akira Koyama, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A thin-film magnetic head includes a lower core layer, a gap layer formed on the lower core layer with a lower pole layer therebetween, an upper pole layer formed on the gap layer, an upper core layer formed on the upper pole layer, and a Gd-defining layer for defining the depth in the height direction of the joint surface between the gap layer and the upper pole layer. The width in the track width direction of the gap layer is smaller than or equal to the width in the track width direction of the upper pole layer when viewed from the surface facing the recording medium. By employing such a thin-film magnetic head, the width in the track width direction of the gap layer can be decreased, and thus track narrowing is achieved.