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Information recording medium and method for manufacturing same

A technology of information recording and manufacturing method, which is applied in the direction of optical record carrier manufacturing, data recording, information storage, etc., can solve the problems of deterioration of regeneration durability, difficulty of DC sputtering or pulsed DC sputtering, etc., and achieve excellent regeneration durability, The effect of high productivity and high reliability

Active Publication Date: 2021-03-23
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If In2O3 is reduced or removed, then ZrO2-SiO2-In2O3 DC sputtering or pulsed DC sputtering
[0017]However, the present inventors focused on the content of In2O3, and found that, In2O3 degrades regeneration durability

Method used

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  • Information recording medium and method for manufacturing same
  • Information recording medium and method for manufacturing same
  • Information recording medium and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0052] An information recording medium according to an embodiment of the present invention is an information recording medium that includes two or more information layers and records or reproduces information by irradiation with laser light, wherein,

[0053] Using at least one information layer among the two or more information layers as a first information layer, the first information layer contains in order from the far side to the near side of the surface irradiated with the laser light. a dielectric thin film and recording film,

[0054] The first dielectric film contains at least Zr and oxygen, and also contains at least one element D1 selected from Zn and Sn. When the total number of atoms of Zr, oxygen, and the element D1 is 100 atomic %, Zr 3 atomic % or more and 26 atomic % or less, containing the element D1 is 10 atomic % or more and 43 atomic % or less,

[0055] The recording film contains at least W, Cu, Mn and oxygen, and further contains at least one element M ...

Embodiment approach 2

[0493] Next, as Embodiment 2, the manufacturing method of the information recording medium 100 demonstrated in Embodiment 1 is demonstrated.

[0494] The method for manufacturing an information recording medium according to an embodiment of the present invention is a method for manufacturing an information recording medium including two or more information layers, wherein,

[0495] comprising the step of forming the above two or more information layers respectively,

[0496] Using at least one information layer among the above two or more information layers as the first information layer, the step of forming the first information layer includes at least a step of forming a first dielectric thin film and a step of forming a recording film,

[0497] In the above step of forming the first dielectric film, a first dielectric film containing at least Zr and oxygen and at least one element D1 selected from Zn and Sn is formed,

[0498] In the above step of forming the recording fil...

Embodiment 1

[0563] In this example, the description figure 1 An example of the information recording medium 100 shown. The following describes the method of manufacturing the information recording medium 100 of this embodiment.

[0564] First, the configuration of the side A information recording medium 101 will be described. As the substrate 1 , a polycarbonate substrate (diameter 120 mm, thickness 0.5 mm) formed with spiral guide grooves (depth 27 nm, track pitch (land-groove distance) 0.225 μm) was prepared. On this substrate 1, an L0 layer 10 is formed. The following film formation is performed sequentially by sputtering: As the first dielectric thin film 11, a material substantially composed of (ZrO 2 ) 25 (SiO 2 ) 25 (In 2 o 3 ) 50 (mol%) target, so that (ZrO 2 ) 25 (SiO 2 ) 25 (In 2 o 3 ) 50 (mol%) film 13nm, as the recording film 12, use substantially by W 25 Cu 21 Ta 21 Zn 5 mn 28 The target formed by -O makes W 25 Cu 21 Ta 21 Zn 5 mn 28 -O film 34nm, as...

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Abstract

Provided are an information recording medium having excellent playback durability, and a method for manufacturing the same. This information recording medium includes two or more information layers, and records or replays information when irradiated with a laser beam, wherein: of the two or more information layers, at least one information layer is a first information layer, and the first information layer includes, from the side far from to the side close to the laser beam irradiation surface, a first dielectric film and a recording film in this order; the first dielectric film includes at least Zr and oxygen, and further includes at least one element D1 selected from Zn and Sn; when the total number of atoms of Zr, oxygen, and the element D1 is 100 atm%, Zr accounts for 3-26 atm%, and the element D1 accounts for 10-43 atm %; the recording film includes at least W, Cu, Mn, and oxygen, and further includes at least one element M selected from Zn, Nb, Mo, Ta, and Ti.

Description

technical field [0001] The present invention relates to a large-capacity information recording medium for optically recording or reproducing information and a method for manufacturing the same. Background technique [0002] With the spread of the Internet and digitalization of broadcasting, etc., the amount of use of digital data is increasing year by year. An optical disc, which is an optical information recording medium, is a high-reliability information recording medium suitable for long-term data storage, and has continued to increase its capacity due to an increase in the amount of information. [0003] The BDXL specification (BD: Blu-ray (registered trademark) Disc) was established in June 2010. According to this specification, a triple-layer disc (an optical disc with three information layers) has a recording capacity of 33.4 gigabytes (GB) per information layer, and can store large-capacity data of 100 GB on one side. Among the three information layers that make up...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24038G11B7/24053G11B7/24067G11B7/2433G11B7/2578G11B7/26
CPCG11B7/24067G11B7/24038G11B7/24053G11B7/257G11B2007/25705G11B7/243G11B2007/24308G11B7/266G11B7/2433G11B7/2578G11B7/26G11B2007/0013
Inventor 儿岛理惠槌野晶夫会田和辉
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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