Dynamic magnetic information storage or retrieval – Head – Gap spacer
Reexamination Certificate
2008-04-30
2011-11-01
Renner, Craig A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Gap spacer
C360S125300
Reexamination Certificate
active
08049988
ABSTRACT:
In a perpendicular magnetic recording head including a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween on a medium-opposing surface, and a pair of side shield layers positioned on both sides in the track width direction of the main magnetic pole layer while interposing a nonmagnetic material layer therebetween, the magnetic gap layer is formed in a partial area in the track width direction bridging the main magnetic pole layer and the pair of side shield layers. The pair of side shield layers are in contact with the return yoke layer in a remaining area where the magnetic gap layer is absent.
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Kameda Hiroshi
Kobayashi Kiyoshi
Oliff & Berridg,e PLC
Renner Craig A.
TDK Corporation
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