Storage medium, reproducing method, and recording method

Abstract

According to one embodiment, a write-once type information storage medium using a recording material which has a low to high characteristic that a light reflectivity in a recording mark increases with respect to a non-recording area and which has a recording characteristic in accordance with a principle of recording without substrate deformation, wherein the recording material includes at least an organic metal complex, and wherein the organic metal complex includes a center metal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2005-072580, filed Mar. 15, 2005, the entire contents of which are incorporated herein by reference. BACKGROUND [0002] 1. Field [0003] One embodiment of the invention relates to a storage medium such as an optical disk, a reproducing method, and a recording method of the storage medium. [0004] 2. Description of the Related Art [0005] As write-once type optical disks each using an organic dye material for a recording material, there have been commercially available a CD-R disk using a recording / reproducing laser light source with a wavelength of 780 nm and a DVD-R disk using a recording / reproducing laser light source with a wavelength of 650 nm. There has been proposed that a cyanine dye thin film capable of changing physical property with light of a comparatively long wavelength, 790 nm for example, is used for a recording layer (refer...

AI Technical Summary

Benefits of technology

[0126] 1) Relationship between track pitch/bit pitch and optimal recording power:

[0127] Conventionally, in the case of a principle of recording with a substrate shape change, if a track pitch is narrowed, a “cross-write” or a “cross-erase” occurs, and if bit pitches are narrowed, an inter-code crosstalk occurs. As in the present embodiment, since a principle of recording without a substrate shape change is devised, it becomes possible to achieve high density by narrowing track pitches/bit pitches. In addition, at the same time, in the above described principle of recording, recording sensitivity is improved, enabling high speed recording and multi-layering of a recording film because optimal recording power can be lowly set.

[0128] 2) In optical recording with a wavelength of 620 nm or less, an ECC block is composed of a combination of a plurality of small ECC blocks and each item of data ID information in two sectors is disposed in a small ECC block which is different from another:

[0129] According to the embodiment, as shown in FIG. 2B, a local optical characteristic change in a recording layer 3-2 is a principle of recording, and thus, an arrival temperature in the recording layer 3-2 at the time of recording is lower than that in the conventional principle of recording due to plastic deformation of a transparent substrate 2-2 or due to thermal decomposition or gasification (evaporation) of an organic dye rec

Problems solved by technology

Thus, an organic dye material compatible with 620 nm cannot be

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