Dynamic magnetic information storage or retrieval – Record copying – Contact transfer
Reexamination Certificate
2006-11-21
2006-11-21
Young, Wayne (Department: 2627)
Dynamic magnetic information storage or retrieval
Record copying
Contact transfer
Reexamination Certificate
active
07139140
ABSTRACT:
When executing a magnetic transfer by bringing a master medium and a slave medium into close contact with each other and applying a transferring magnetic field, a permitted limit of the application direction of the transferring magnetic field is defined so that magnetic patterns can be accurately transferred. A slave medium2is previously initial DC magnetized in a track direction by applying a magnetic field to the slave medium in the track direction of a slave surface, and when executing a magnetic transfer by bringing the master medium3and the slave medium2into close contact with each other and applying the transferring magnetic field in the track direction of the slave surface, the application angle α of the transferring magnetic field is defined within a range of ±30° in a vertical direction with respect to the slave surface. Furthermore, the application angle of the transferring magnetic field is defined within a range of ±30° with respect to the track direction on a plane parallel to the slave surface.
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patent: 5229983 (1993-07-01), Kawamura et al.
patent: 6347016 (2002-02-01), Ishida et al.
patent: 6433944 (2002-08-01), Nagao et al.
patent: 6570724 (2003-05-01), Komatsu et al.
patent: 57138061 (1982-08-01), None
Komatsu Kazunori
Nishikawa Masakazu
Negrón Daniell L.
Young Wayne
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