Method of manufacturing a vertical recording magnetic head

Details Method of manufacturing a vertical recording magnetic head Method of manufacturing a vertical recording magnetic head

2005-04-04

2009-11-03

Kim, Paul D (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603130, C029S603150, C029S603160, C029S603180, C360S121000, C360S122000, C360S317000, C427S127000, C427S128000

Reexamination Certificate

active

07610673

ABSTRACT:
A vertical recording magnetic head and a method of manufacturing the same is provided. The magnetic head includes a main magnetic pole layer on a surface opposite to a recording medium and a pair of neck height markers which is exposed on the surface around the main magnetic pole layer and which indicates a neck height position of the main magnetic pole layer by way of inter-exposure area ratios. The neck height markers have one cross sections that increases and the other that decreases even though the cross sections in a plane parallel to the surface are oriented toward forward or backward directions in a neck height direction. The neck height markers have the same cross sections at a specific cross sectional position parallel to the surface.

REFERENCES:
patent: 5305559 (1994-04-01), Ogawa
patent: 5331495 (1994-07-01), Yoshida et al.
patent: 5579717 (1996-12-01), Crandell et al.
patent: 60-177416 (1985-09-01), None
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patent: 01-169713 (1989-07-01), None
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patent: 04-078013 (1992-03-01), None
patent: 10-172115 (1998-06-01), None
patent: 2000-195020 (2000-07-01), None
Notice of Preliminary Rejection issued in corresponding Japanese Patent Application No. 2004-111346 issued on Oct. 31, 2007.

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