Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2004-11-30
2008-10-14
Watko, Julie Anne (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
C029S603130, C029S603230
Reexamination Certificate
active
07436627
ABSTRACT:
A pole-layer-encasing layer made of a nonmagnetic material is disposed on an underlying layer made of a nonmagnetic conductive material. The encasing layer has a groove that penetrates. A pole layer is disposed in the groove. The pole layer is formed by plating through feeding a current to the underlying layer. A polishing stopper layer made of a nonmagnetic conductive material is disposed on the top surface of the encasing layer. The polishing stopper layer indicates the level at which polishing for controlling the thickness of the pole layer is stopped. The polishing stopper layer has an opening that penetrates, and the edge of the opening is located directly above the edge of the groove located in the top surface of the encasing layer.
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Araki Hironori
Ishizaki Kazuo
Itoh Hiroyuki
Sasaki Yoshitaka
Headway Technologies Inc.
Oliff & Berridg,e PLC
Watko Julie Anne
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