Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2005-11-15
2005-11-15
Cao, Allen (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
06965496
ABSTRACT:
In a first magnetic film, two notches are formed separately by a given distance, and a first pole piece is located between the notches. The first pole piece includes a uniform width portion. A second magnetic film includes a second pole piece. In the first pole piece, if the height of the uniform width portion is defined by “TH1”, and the depth of the uniform width portion to a top surface from a base plane of the first magnetic film is defined by “ND1”, and the thickness of said gap film is defined by “WG”, the relations of TH1≧4WG and ND1≧4WG are satisfied.
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Cao Allen
Oliff & Berridg,e PLC
TDK Corporation
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