Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2007-03-05
2010-10-05
Watko, Julie Anne (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
C360S125030, C360S125150
Reexamination Certificate
active
07808743
ABSTRACT:
A perpendicular magnetic write head includes an auxiliary magnetic pole layer disposed on a trailing or leading side of a main magnetic pole layer, the auxiliary magnetic pole layer being recessed from the main magnetic pole layer. A nonmagnetic layer is disposed in a layer same as the auxiliary magnetic pole layer and in front of the auxiliary magnetic pole layer, the nonmagnetic layer having an internal stress of a direction same as that of the main magnetic pole layer, and a write shield layer is disposed in a layer same as the auxiliary magnetic pole layer and in front of the auxiliary magnetic pole layer, the write shield layer being separated from the main magnetic pole layer with a gap layer in between. The nonmagnetic layer is arranged to fill up a space between the auxiliary magnetic pole layer and the write shield layer.
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Kasahara Noriaki
Matono Naoto
Narushima Shin
Otani Koichi
Sakamoto Takamitsu
Oliff & Berridg,e PLC
Sae Magnetics (H.K.) Ltd.
TDK Corporation
Watko Julie Anne
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