Dynamic magnetic information storage or retrieval – Fluid bearing head support – Disk record
Reexamination Certificate
2006-05-01
2008-12-02
Evans, Jefferson (Department: 2627)
Dynamic magnetic information storage or retrieval
Fluid bearing head support
Disk record
C360S236500
Reexamination Certificate
active
07460335
ABSTRACT:
A magnetic head comprises a retrieving unit for converting magnetic information output from a recording medium into an electric signal, a writing unit having the function of electromagnetic conversion for writing the magnetic information in the recording medium in response to the electric signal, and a first protective film formed on the retrieving unit. A second protective film is formed on the first protective film. The coefficient of linear expansion of the second protective film is reduced in comparison with that of the first protective film. Furthermore, the first protective film is an alumina film; in contrast, the second protective film is a film made of an alumina film containing silicon oxide therein.
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Japan Patent Office (JPO) office action dated Feb. 19, 2008 for JPO application JP2002-355786.
Fukui Hiroshi
Iwakura Tadayuki
Kawabe Takashi
Maruyama Yohji
Morijiri Makoto
Evans Jefferson
Hitachi Global Technologies Japan, Ltd.
Townsend and Townsend / and Crew LLP
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