Master carrier for magnetic transfer

Details Master carrier for magnetic transfer Master carrier for magnetic transfer

2005-07-26

2005-07-26

Vargot, Mathieu D. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

C264S001360, C264S485000, C425S810000, C430S296000, C430S320000

Reexamination Certificate

active

06921499

ABSTRACT:
To improve the quality of transfer signal by reducing loss of azimuth when the magnetic transfer is performed by bringing a master carrier and a slave medium into close contact with each other and applying transfer magnetic field thereto, even if the width of track is narrowed.The master carrier3has a pattern which corresponds to a transfer information for high density recording and is formed of a soft magnetic layer32with a width W of track of 3 μm or less, wherein the pattern is written and formed by scanning with an electron beam EB of which a writing diameter d is smaller than the width W of track, on a same track over plural times. Writing is performed approximately to a rectangular shape, whereby the loss of azimuth can be reduced and the accuracy of transfer can be enhanced.

REFERENCES:
patent: 5112724 (1992-05-01), Bradshaw
patent: 6249405 (2001-06-01), Hoshiya et al.
patent: 0 915 456 (1999-05-01), None
patent: WO 00/65580 (2000-11-01), None
International Search Report.

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