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Optical information recording medium and method for manufacturing the same

A technology for recording media and optical information, which is applied in the manufacture of optical recording media, optical recording media, recording/reproducing with optical methods, etc. It can solve the problems of recording media loss of function, easy corrosion, low thermal conductivity, etc., and achieve good recording High regenerative characteristics and high reliability

Inactive Publication Date: 2007-02-07
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the more it is added, the lower the thermal conductivity, so it is better to reduce the amount of addition as much as possible, but on the contrary, if the amount of addition is reduced, it will be easy to corrode
In addition, atomic diffusion between adjacent layers may cause the loss of the function as a recording medium, especially when the above-mentioned light-absorbing layer is provided, there is a high possibility of problems.

Method used

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  • Optical information recording medium and method for manufacturing the same
  • Optical information recording medium and method for manufacturing the same
  • Optical information recording medium and method for manufacturing the same

Examples

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Embodiment approach 1

[0045] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[0046] Figure 1~3 It is a partial cross-sectional view of a configuration example of the optical information recording medium of the present invention.

[0047] Such as figure 1 As shown, in the optical information recording medium of the present invention, at least a recording layer 2 , a light absorbing layer 3 , a reflective layer 4 and a protective substrate 5 are sequentially disposed on a transparent substrate 1 . Recording and reproduction are performed by condensing laser light 6 with an objective lens 7 and irradiating the optical information recording medium from the transparent substrate 1 side.

[0048] In addition, if figure 2 As shown, the lower dielectric layer 8 can also be appropriately provided between the transparent substrate 1 and the recording layer 2, the upper dielectric layer 9 can be provided between the recording layer 2 and ...

Embodiment 1

[0074] As a transparent substrate, a substrate composed of polycarbonate and having a diameter of 12 cm, a thickness of 0.6 mm, a groove pitch of 1.23 μm, and a groove depth of 55 nm was prepared. Using the sputtering method, in an Ar environment, on the surface of the transparent substrate on which the grooves are formed, the following layers are sequentially stacked: composed of (ZnS) 80 (SiO 2 ) 20 The lower side dielectric layer with a film thickness of 120nm is composed of (ZrO 2 ) 46 (Y 2 o 3 ) 4 (Cr 2 o 3 ) 50 The lower interface layer with a film thickness of 5nm is composed of Ge 40 Sb 4 Bi 4 Te 52 A recording layer with a film thickness of 8.5nm, composed of (ZrO 2 ) 46 (Y 2 o 3 ) 4 (Cr 2 o 3 ) 50 The upper interface layer with a film thickness of 5nm is composed of (ZnS) 80 (SiO 2 ) 20 The upper side dielectric layer with a film thickness of 40nm is composed of CrSi 2 A light-absorbing layer with a film thickness of 30nm, made of Ag 98 In 2...

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Abstract

The present invention provides a recording medium that has high reliability and affords good recording and reproduction characteristics over a wide linear velocity range and high density, as well as a method for manufacturing the recording medium. To this end, an optical information recording medium comprises at least a recording layer that changes its state to be different and optically detectable by irradiating with a light beam, an optical absorption layer composed of a material containing at least 50 at% and no more than 95 at% silicon, and a reflective layer composed of a material containing at least 95 at% silver and no more than 5 at% indium, with these layers provided in that order on a transparent substrate.

Description

technical field [0001] The present invention relates to an optical information recording medium and a manufacturing method thereof, and more particularly to an optical information recording medium capable of recording and reproducing information signals by irradiating laser light or the like, and to a manufacturing method thereof. Background technique [0002] By irradiating a thin film of a chalcogen material or the like formed on a substrate with laser light under different irradiation conditions, and then performing local heating, it is possible to make the heated portion between an amorphous phase and a different optical constant (refractive index n, extinction coefficient k) A phase change occurs between crystalline phases. Furthermore, the research and development of the optical information recording medium of the so-called phase change system utilizing this phenomenon is attracting more and more attention. [0003] In the optical information recording medium of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24G11B7/258G11B7/257G11B7/26G11B7/254G11B7/24038G11B7/24067G11B7/243G11B7/2433G11B7/2531G11B7/2533G11B7/2534G11B7/2578G11B7/2585G11B7/259
CPCG11B2007/25715G11B2007/2571G11B2007/25708G11B7/2533G11B7/2531G11B7/2534G11B7/259G11B7/252G11B7/2578G11B2007/25706G11B7/254G11B7/24067
Inventor 北浦英树儿岛理惠
Owner PANASONIC CORP
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