Methods for creating a magnetic main pole with side shield...

Details Methods for creating a magnetic main pole with side shield... Methods for creating a magnetic main pole with side shield...

2008-12-22

2011-11-15

Nguyen, Tan T. (Department: 2827)

Dynamic magnetic information storage or retrieval

Head

Core

C360S119020, C360S119040, C360S125030

Reexamination Certificate

active

08059367

ABSTRACT:
A method according to another embodiment includes forming a side shield layer of ferromagnetic material above a substrate; masking the side shield layer; milling an unmasked region of the side shield layer for forming a pole trench therein; and forming a pole layer in the pole trench. A structure according to one embodiment includes a substrate; a side shield layer of ferromagnetic material on the substrate, wherein the substrate has a region covered by the side shield layer and a region not covered by the side shield layer; a pole trench in the side shield layer and the region of the substrate not covered by the side shield layer; a layer of nonmagnetic material in the pole trench; and a pole layer in the pole trench, wherein the pole layer has a greater thickness above the region of the substrate not covered by the side shield layer than above the region of the substrate covered by the side shield layer.

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patent: 5943763 (1999-08-01), Shouji et al.
patent: 7227720 (2007-06-01), Sasaki et al.
patent: 7599154 (2009-10-01), Sbiaa et al.
patent: 2005/0259355 (2005-11-01), Gao et al.
patent: 2007/0177301 (2007-08-01), Han et al.
patent: 2008/0297945 (2008-12-01), Han et al.

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