Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shigekazu Ohtomo0
Hiroshi Fukui0
Moriaki Fuyama0
Nobuo Yoshida0
Date of Patent
November 28, 2006
0Patent Application Number
110024980
Date Filed
December 3, 2004
0Patent Primary Examiner
Patent abstract
A thin film head having reading part and recording part having an upper magnetic pole front end layer and a lower magnetic pole having a lower magnetic main layer, a lower magnetic pole front end portion on the lower magnetic main layer, and a projection step portion on the lower magnetic pole front end portion. The upper magnetic pole front end layer has a magnetic pole expansion position and a length from an air bearing surface to the magnetic pole expansion position is less than a length from the air bearing surface to gap depth position of the lower magnetic pole front end portion.
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