Magnetic domain wall displacement type magneto-optical medium and method for manufacturing the same
AssigneeCanon Kabushiki Kaisha
InventorKazuyoshi Ishii
Life of this patent
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Abstract
A method for manufacturing a magnetic domain wall displacement type magneto-optical medium includes forming a magnetic layer on a substrate and forming sectioning regions in which perpendicular magnetic anisotropy of the magnetic layer is reduced, and a plurality of belt-shaped recording tracks are sandwiched by the sectioning regions and are magnetically separated from each other by irradiating the magnetic layer on the substrate with a light beam or a charged particle beam of a wavelength of not more than 550 nm and scanning the light on the substrate in parallel and at a same interval and a magnetic domain wall displacement type magneto-optical medium.
Claims8
A method for manufacturing a magneto-optical medium in which a domain wall of a recording magnetic domain is displaced in accordance with a temperature distribution in the magneto-optical medium comprising, in order:
- (a) the step of forming a magnetic layer on a substrate;
- (b) the step of forming on the magnetic layer a dielectric layer;
- (c) the step of forming sectioning regions in which perpendicular magnetic anisotropy of the magnetic layer is reduced by irradiating the magnetic layer on the substrate with a light beam of a wavelength of not more than 550 nm or a charged particle beam through the dielectric layer from a side opposite a side of the magnetic layer facing the substrate surface and scanning the light beam or the charged particle beam on the substrate in parallel and at a same interval, thereby magnetically separating from each other a plurality of recording tracks sandwiched between said sectioning regions;
- and
- (d) the step of forming on the dielectric layer a protection coat.
Dependencies are inferred from the claim text.