Dynamic magnetic information storage or retrieval – Head – Head surface structure
Reexamination Certificate
2011-08-02
2011-08-02
Deo, Duy-Vu N (Department: 1713)
Dynamic magnetic information storage or retrieval
Head
Head surface structure
C360S125420, C360S125460, C360S125510, C360S125590, C360S125640
Reexamination Certificate
active
07990651
ABSTRACT:
A method for manufacturing a magnetic write head having a stepped trailing shield. The stepped trailing shield is formed by forming a non-magnetic bump over a write pole prior to electroplating a wrap-around magnetic shield. The method allows the location of the front edge of the bump relative to the back edge of the wrap-around shield to be monitored by measuring the electrical resistance of an electrical lapping guide formed concurrently with these features. This concurrent formation of a lapping guide can be used to define the relative location of other features as well, such as the location of a back edge of a wrap-around shield relative to a flare point of a write pole.
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Hsiao Wen-Chien (David)
Lam Hieu
Nikitin Vladimir
Zhang Sue Siyang
Zheng Yi
Deo Duy-Vu N
Hitachi Global Storage Technologies - Netherlands B.V.
Zilka-Kotab, PC
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