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Optical Information Recording Medium

A technology for recording media and optical information, applied in the direction of optical record carrier, recording layer, data recording, etc.

Active Publication Date: 2016-11-02
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for recording layers other than the recording layer located at the deepest portion on the side of the information recording surface, if the transmittance of the information signal layer changes greatly before and after recording the information signal, due to the effective The intensity of the laser light is changed without properly performing the recording of the information signal on the layer of the deepest part

Method used

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  • Optical Information Recording Medium
  • Optical Information Recording Medium
  • Optical Information Recording Medium

Examples

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example

[0154] Although the present invention will be described in detail below using test examples, the present invention is not limited to these test examples.

[0155] Hereinafter, in order from the substrate side to the laser irradiation surface side, the information signal layers of the multilayer optical information recording medium are referred to as L0 layer, L1 layer, L2 layer...

[0156] Hereinafter, the extinction coefficients of the first protective layer and the second protective layer were measured as follows in the test example. After manufacturing the sample in which the first protective layer or the second protective layer of about 100 nm was laminated on the silicon wafer, the measurement was performed by a spectroscopic ellipsometer (manufactured by Otsuka Electronics Co., Ltd, product name: FE-5000) The medium records the extinction coefficient of the sample at a wavelength of 405 nm.

[0157] The test examples are described below in the following order.

[0158] 1. Mater...

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Abstract

An optical information recording medium, comprising: a substrate; two or more information signal layers disposed on the substrate; and a cover layer disposed on the information signal layer, wherein the surface of one side of the substrate and the cover layer is a light irradiation surface, Wherein, at least one information signal layer except the information signal layer at the deepest part from the light irradiation surface includes an inorganic recording layer comprising tungsten oxide and palladium oxide, and the first protective layer is arranged on the first main surface of the inorganic recording layer , the second protective layer is disposed on the second main surface of the inorganic recording layer, wherein at least one of the first protective layer and the second protective layer is a layer having an extinction coefficient of 0.05 to 0.6.

Description

Technical field [0001] This application relates to optical information recording media. Specifically, this application relates to an optical information recording medium having two or more information signal layers. Background technique [0002] The market for optical information recording media is still dominated by CD (Compact Disc), DVD (Digital Versatile Disc) and so on. However, in recent years, with the expansion of high-definition televisions and a significant increase in data processed by PCs (Personal Computers), the demand for the capacity of optical information recording media has further increased. To meet this demand, mass storage optical information recording media compatible with such as BD (Blu-ray Disc (registered trademark)) have emerged, and a new mass storage information recording medium market is being established. [0003] Although there are writable optical information recording media represented by CD-RW (Compact Disc-Writable) and DVD±RW (Digital Versatil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/2578G11B7/2403G11B7/24G11B7/24038G11B7/24056G11B7/243G11B7/2433G11B7/254G11B7/257
CPCG11B7/2403G11B7/24038G11B2007/25715G11B7/2578Y10T428/21
Inventor 田畑浩
Owner SONY CORP
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