Dynamic magnetic information storage or retrieval – Head – Coil
Reexamination Certificate
2011-08-16
2011-08-16
Renner, Craig A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Coil
C360S125060, C360S125220
Reexamination Certificate
active
08000058
ABSTRACT:
Embodiments of the invention provide a perpendicular recording magnetic head capable of reducing leakage magnetic fields from the soft magnetic films on the air bearing surface side and reducing the protrusion of the soft magnetic films in the direction of the air bearing surface side due to thermal deformation of the soft magnetic films. In one embodiment, the write functional section includes a coil conductor, second soft magnetic film pattern and first soft magnetic film pattern that cover the coil conductor from top and bottom and are magnetically coupled to each other, and a main magnetic pole piece determining a track width. The read functional section includes a reading element sandwiched between two magnetic shield films. A pedestal magnetic pole pattern is formed at the frontal end position of the first soft magnetic film pattern.
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Iwakura Tadayuki
Maruyama Youji
Mochizuki Masafumi
Ohdake Ichiro
Garcia Carlos E
Hitachi Global Storage Technologies - Netherlands B.V.
Patterson & Sheridan LLP
Renner Craig A.
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