Etching a substrate: processes – Forming or treating article containing magnetically...
Reexamination Certificate
2007-11-21
2011-11-01
Alanko, Anita (Department: 1713)
Etching a substrate: processes
Forming or treating article containing magnetically...
C216S041000, C216S044000, C216S047000, C216S051000, C216S067000, C216S075000
Reexamination Certificate
active
08048323
ABSTRACT:
A method for manufacturing a magnetic recording medium (30) having magnetically separate magnetic recording patterns on at least one surface of a nonmagnetic substrate (1), includes the steps of forming a magnetic layer (2) on the nonmagnetic substrate, forming a mask layer (3) on the magnetic layer, forming a resist layer (4) on the mask layer, transferring negative patterns of the magnetic recording patterns to the resist layer using a stamp (5), removing portions of the mask layer which correspond to the negative patterns of the magnetic recording patterns, implanting ions in the magnetic layer from a resist layer-side surface to partly demagnetize the magnetic layer, and removing the resist layer and the mask layer. A magnetic recording and reproducing apparatus includes the above magnetic recording medium (30), a driving section (11) that drives the magnetic recording medium in a recording direction, a magnetic head (27) including a recording section and a reproducing section, a device (28) for moving the magnetic head relative to the magnetic recording medium, and recording and reproducing signal processing device (29) for inputting a signal to the magnetic head and reproducing an output signal from the magnetic head.
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Fukushima Masato
Sakawaki Akira
Alanko Anita
Showa Denko K.K.
Sughrue & Mion, PLLC
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