Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-01-12
2009-06-23
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603130, C029S603150, C029S603160, C029S603180, C360S125020, C360S125100, C360S125200, C360S125520, C360S125650
Reexamination Certificate
active
07549213
ABSTRACT:
A method for independently controlling track width and bevel angle of a write pole tip having a P3pole tip for perpendicular recording. The method includes establishing the track width in a portion of the P3layer material. A portion of this portion having the established track width is protected by providing a temporary masking material to make a protected portion. At least one unprotected portion is left exposed to be shaped. This unprotected portion is then beveled to produce at least one beveled portion having a bevel angle. The protected portion produces a rectangular portion which together with the beveled portion produce a hexagonal pole tip. Also a magnetic head having a hexagonal pole tip, and a disk drive having a magnetic head having a hexagonal pole tip.
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Hsu Yimin
Lo Jyh-Shuey
Guernsey Larry B.
Hitachi Global Storage Technologies - Netherlands B.V.
Patent Law Office of Larry Guernsey
Tugbang A. Dexter
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