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:
Nov. 28, 2006
Filed:
Dec. 03, 2004
Shigekazu Ohtomo, Sayama, JP;
Moriaki Fuyama, Hitachi, JP;
Nobuo Yoshida, Odawara, JP;
Hiroshi Fukui, Hitachi, JP;
Shigekazu Ohtomo, Sayama, JP;
Moriaki Fuyama, Hitachi, JP;
Nobuo Yoshida, Odawara, JP;
Hiroshi Fukui, Hitachi, JP;
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
A thin film head having reading part and recording part having an upper magnetic pole front end layer and a lower magnetic pole having a lower magnetic main layer, a lower magnetic pole front end portion on the lower magnetic main layer, and a projection step portion on the lower magnetic pole front end portion. The upper magnetic pole front end layer has a magnetic pole expansion position and a length from an air bearing surface to the magnetic pole expansion position is less than a length from the air bearing surface to gap depth position of the lower magnetic pole front end portion.