Method of pre-processing over-write capable magnetooptical recording medium, and pre-processed over-write capable magnetooptical recording medium

U.S. Patent Number: 5258973

Abstract: An over-write capable magnetooptical recording medium is pre-processed by subjecting a track separation zone to a pre-processing field which aligns the magnetization of a recording layer in a predetermined direction so as to avoid formation, in the separation zone, of a magnetic wall between the recording layer and a reference layer when the reference layer is subjected to an initial field to align its direction of magnetization.

Inventors: Iida; Haruhisa (Tokyo, JP)

Assignee: Nikon Corporation (Tokyo, JP)

Application Number: 07/688,596

Issued: 1993-11-02

Expired: 2005-11-02

Classes: 369/275.2 ; 360/131; 360/135; 369/121; 369/13.55; 369/275.3; 369/59.11

Field of search: 369/13,59,63,76,116,110,121,275.1,275.3,275.2 360/131,135

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