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Optical information recording medium and recording method using it

一种记录媒体、光信息的技术，应用在光学记录/再现/擦除方法、光学记录载体、光学记录头等方向，能够解决很难确保高的透过率、界面层劣化、热损伤等问题

Inactive Publication Date: 2004-02-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in blue-violet wavelengths, repeated recording degrades the interfacial layer due to its susceptibility to thermal damage as described above.
In addition, the attenuation coefficient k in the blue-violet wavelength is as large as 0.2, and it is difficult to ensure high transmittance

Method used

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  • Optical information recording medium and recording method using it
  • Optical information recording medium and recording method using it
  • Optical information recording medium and recording method using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] In Embodiment 1, an example of the optical information recording medium of the present invention will be described. figure 1 It is a partial sectional view of the optical information recording medium 10 (hereinafter referred to as the recording medium 10 ) of the first embodiment.

[0039] Such as figure 1 As shown, the recording medium 10 includes: a first substrate 11; a second substrate 12 arranged parallel to the first substrate; and an information layer 20 arranged between the first substrate and the second substrate. Information is recorded and reproduced on the recording medium 10 using the laser beam 14 incident from the first substrate 11 side through the objective lens 13 . The wavelength of the laser beam 14 is preferably in the range of, for example, 300 μm to 900 μm, and is preferably not more than 500 μm for high-density recording.

[0040] The information layer 20 records information. The information layer 20 is a multilayer film in which multiple laye...

Embodiment approach 2

[0064] In Embodiment 2, the method of manufacturing the optical information recording medium explained in Embodiment 1 will be described.

[0065] Each layer (except the spacer layer 27) constituting the information layer of the recording medium can be vacuum evaporation, sputtering, ion sputtering, CVD (chemical vapor deposition), MBE (molecular beam epitaxy) etc., for example. The vapor deposition method (vapor deposition) to form. In addition, the separation layer 27 can be formed by a method of spraying an ultraviolet curable resin by a spin coating method, and then irradiating ultraviolet rays to cure the resin, or a method of adhering an adhesive sheet.

[0066] The following describes Si x Ge 1-x (0.3≦) A method of forming an interface layer (lower interface layer 22 and / or upper interface layer 24 ) in which nitride is the main component. This interface layer can be formed by a normal sputtering method or a reactive sputtering method. When using the reactive sputte...

Embodiment approach 3

[0069] In the third embodiment, the method of recording / reproducing the optical information recording medium explained in the first embodiment will be described.

[0070] image 3 is a model diagram of an example structure of a recording / reproducing apparatus used in the recording method of the present invention. image 3 The recording / reproducing device 30 includes a laser diode 31 , a half mirror 32 , a motor 33 , a photodetector 34 and an objective lens 13 . Recording / playback of the recording medium 35 is performed by the recording / playback device 30 . The motor 33 drives the recording medium 35 to rotate. The recording medium 35 is the optical information recording medium of the present invention described in the first embodiment.

[0071] The laser beam 14 emitted from the laser diode 31 is focused on the recording medium 35 through the half mirror 32 and the objective lens 13 . Information is recorded by irradiating the recording medium 35 with the laser beam 14 of ...

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Abstract

An optical information recording medium 10 includes a first substrate 11, a second substrate 12 disposed in parallel with the first substrate 11, and an information layer 20 disposed between the first substrate 11 and the second substrate 12, and the information layer 20 includes a recording layer 23 and inorganic layers (lower side interface layer 22 and upper side interface layer 24) adjacent to the recording layer 23. The recording layer 23 is changed between at least two different states, which are discernable optically, by irradiation with a laser beam 14 incident from the first substrate 11 side. The inorganic layer contains a nitride of SixGe1-x (where 0.3 ≤ x ≤ 0.9) as a main component. The present invention provides an optical information recording medium capable of recording / reproducing information with satisfactory reliability even in recording / reproducing with a light beam having a short wavelength or in recording / reproducing with respect to a plurality of information layers.

Description

technical field [0001] The present invention relates to an optical information recording medium capable of recording and reproducing information by irradiating a light beam such as a laser beam, and a recording method using the information recording medium. Background technique [0002] It is known that a thin film formed on a substrate such as a chalcogenide material can be irradiated with a laser beam for local heating, and it can be transformed into an amorphous state and a crystalline state with different optical constants (refractive index n, attenuation coefficient k) by using different irradiation conditions. phase transition between them. Research and development of a so-called phase-change optical information recording medium utilizing this phenomenon is in progress. In the optical information recording medium of the phase change method, by irradiating the information track with a laser beam whose output is modulated between two power levels of the recording level ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0045G11B7/006G11B7/24038G11B7/243G11B7/253G11B7/257
CPCG11B7/253G11B2007/2431G11B2007/24308G11B2007/24314G11B7/257G11B7/24038G11B7/0062G11B7/243G11B2007/2571G11B2007/24316G11B2007/24312
Inventor 北浦英树山田升
Owner PANASONIC CORP
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