Thin-film magnetic head, magnetic device including the same,...

Details Thin-film magnetic head, magnetic device including the same,... Thin-film magnetic head, magnetic device including the same,...

Filed on

2007-05-08

Date issued

2007-05-08

Examiner

Castro, Angel (Department: 2627)

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Head

SubSubClass

Core

Type

Reexamination Certificate

Status

active

Patent number

10912651

Description

ABSTRACT:
A thin-film magnetic head includes a magnetic pole, a magnetic circuit unit separate from the magnetic pole, and a coil layer. The magnetic pole has a predetermined shape in which the width of the bottom surface of an upper magnetic pole layer is larger than the width of the top surface of a lower magnetic pole layer. The core layer is disposed at the back in the height direction of the magnetic pole.

REFERENCES:
patent: 4970615 (1990-11-01), Gau
patent: 4970616 (1990-11-01), Ramaswamy
patent: 5751526 (1998-05-01), Schemmel
patent: 5916423 (1999-06-01), Westwood
patent: 6055138 (2000-04-01), Shi
patent: 6477002 (2002-11-01), Mizoh
patent: 6480355 (2002-11-01), Kamijima
patent: 6683748 (2004-01-01), Kim et al.
patent: 7002777 (2006-02-01), Ogawa et al.
patent: 2002-92818 (2002-03-01), None
patent: 2002-197616 (2002-07-01), None

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