Optical disk having super-resolution film
AssigneeKabushiki Kaisha Toshiba
InventorsKenji Todori, Toshihiko Nagase, Katsutaro Ichihara, Naoko Kihara
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Abstract
An optical disk from which recorded data are read out by means of light irradiation has a substrate having recording pits as data on a surface thereof, and stacked films formed on the substrate. The stacked films contain a super-resolution film of a polymer matrix and semiconductor particles having an organic group covalently bonded thereto, and a reflective film reflecting light. The super-resolution film and the reflective film are provided in this order from a light incident side.
Claims14
An optical disk from which recorded data are read out by light irradiation, comprising:
- a substrate comprising recording pits as data on a surface thereof;
- and
- stacked films formed on the substrate, the films comprising a super-resolution film containing a polymer matrix and particles each consisting of a semiconductor particle and an organic group covalently bonded thereto, and a reflective film reflecting light, the super-resolution film and the reflective film being provided in this order from a light incident side, and a modal diameter in particle size distribution of the particles being not smaller than ¼ and not larger than one times as large as a Bohr radius of an exciton of the semiconductor,
- wherein the organic group covalently bonded to the semiconductor particle is directly in contact with the polymer matrix and wherein even in the case where a part of polymer molecules in the polymer matrix is covalently bonded to the semiconductor particle, a ratio of the polymer molecules bonded to the semiconductor particle is 1 mol % or less of the entire polymer molecules in the polymer matrix.
An optical disk to which data are recorded by light irradiation, comprising:
- a substrate;
- and
- stacked films formed on the substrate, the films comprising a super-resolution film containing a polymer matrix and particles each consisting of a semiconductor particle and an organic group covalently bonded thereto, an optical recording layer to which data are recorded, and a reflective film reflecting light, the super-resolution film, the optical recording layer and the reflective film being provided in this order from a light incident side, and a modal diameter in the particle size distribution of the semiconductor particles is not smaller than ¼ and not larger than one times as large as a Bohr radius of an exciton of the semiconductor,
- wherein the organic group covalently bonded to the semiconductor particle is directly in contact with the polymer matrix and wherein even in the case where a part of polymer molecules in the polymer matrix is covalently bonded to the semiconductor particle, a ratio of the polymer molecules bonded to the semiconductor particle is 1 mol % or less of the entire polymer molecules in the polymer matrix.
Dependencies are inferred from the claim text.