Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1997-04-23
1999-12-28
Neyzari, Ali
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369283, G11B 724
Patent
active
060090707
ABSTRACT:
A double-layer optical disk having characteristics that are less wavelength dependent, allows the use of a pickup comprising a light beam of a different wavelength to read each layer accurately and stably. In the double layer optical disk which comprises, a first reflection layer carrying first information, a spacer layer, and a second reflection layer carrying second information, each laminated on a transparent substrate having a specific refractive index thereby allowing a pickup to read said first and second information, the first reflection layer is formed by laminating a metal layer made of a metal thin film and a dielectric layer made of a dielectric having a refractive index higher than the refractive index of the transparent substrate.
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patent: 5708652 (1998-01-01), Ohki et al.
patent: 5708653 (1998-01-01), Okada et al.
M. Kaneko, "Direct overwriting & Super resolution using exchange-coupled magnetic multilayer Disks", IEEE Transaction on magnetics, vol. 28, No. 5, Sep. 1992, pp. 2494-2699.
Higuchi Takanobu
Jinno Satoshi
Neyzari Ali
Pioneer Electronic Corporation
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