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Optical information recording medium and manufacturing method thereof

一种记录介质、光学信息的技术，应用在光学记录载体制造、光学记录/再现/擦除方法、光学记录载体等方向，能够解决成膜周期长时间等问题，达到抑制成膜速度的变化、良好记录灵敏度的效果

Inactive Publication Date: 2005-11-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not preferable in consideration of productivity because the film formation cycle takes a long time when the vacuum is kept for a long time

Method used

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  • Optical information recording medium and manufacturing method thereof
  • Optical information recording medium and manufacturing method thereof
  • Optical information recording medium and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] One embodiment of the optical information recording medium will be described. The optical information recording medium of the present invention is a recording medium including a plurality of information layers separated from each other by an optical separation layer. In this embodiment, as an example, an optical information recording medium including two information layers will be described.

[0042] figure 1 A cross-sectional view showing a schematic multilayer structure in the radial direction of a disc-shaped optical information recording medium 1 (hereinafter referred to as "optical disc 1") of the present embodiment is shown. Such as figure 1 As shown, in the optical disc 1, a first substrate 11, a first information layer 12, an optical separation layer (first optical separation layer) 13, a second information layer 14, and a second substrate 15 are sequentially stacked. Each of the two information layers 12, 14 laminated together via the optical separation la...

Embodiment 2

[0089] One embodiment of the manufacturing method of the optical information recording medium of the present invention will be described. In this embodiment, the optical disc 1 introduced in Embodiment 1 (see figure 2 ) method of manufacture.

[0090] First, the second information layer 14 is formed on the second substrate 15 . More specifically, first, second substrate 15 (for example, with a thickness of 1100 μm) is prepared, and placed in a film forming apparatus.

[0091] Then, a reflective layer 144 is formed on the second substrate 15 . It can be formed by sputtering using a sputtering target containing elements constituting the reflective layer 144 in an Ar atmosphere or an atmosphere of a mixed gas of Ar gas and active gas (at least one gas selected from oxygen and nitrogen). reflective layer 144 . In this case, when forming the guide groove for guiding the laser beam 2 to the second substrate 15, the reflective layer 144 is formed on the surface on the side where...

Embodiment 3

[0113] In Embodiment 3, an example of a method of recording / reproducing information on the optical disc 1 as described in Embodiment 1 will be described.

[0114] First, the recording / reproducing apparatus used in the recording / reproducing method in this embodiment will be described. image 3 The configuration of a part of the recording / reproducing device 3 used in the recording / reproducing method of this embodiment is schematically shown. The recording / reproducing device 3 includes a spindle motor 31 for rotating the optical disc 1 , an optical head 32 having a semiconductor laser 33 , and an objective lens 34 for focusing the laser beam 2 emitted from the semiconductor laser 33 . The optical disc 1 is the optical information recording medium described in Embodiment 1, and includes two information layers (the first information layer 12 and the second information layer 14). The first information layer 12 includes a recording layer 123 , and the second information layer 14 inc...

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Abstract

The optical information recording medium of the present invention includes a plurality of information layers provided on a substrate and an optical separating layer provided between information layer adjacent to each other, and information is recorded or reproduced by irradiation of a laser beam. When an information layer that is provided closest to a laser beam incident side of the plurality of information layers is taken as a first information layer and an optical separating layer provided in contact with the first information layer is taken as a first optical separating layer, then the first information layer comprises a recording layer, a transmittance adjusting layer that adjusts a transmittance of the first information layer, and a low refractive index layer provided between the transmittance adjusting layer and the first optical separating layer.

Description

technical field [0001] The present invention relates to an optical information recording medium having a multilayer structure in which information can be optically recorded, erased, rewritten, and reproduced on a plurality of information layers by irradiation of a laser beam or the like, and a method of manufacturing the same. Background technique [0002] In a phase-change optical information recording medium used as a rewritable medium, information can be recorded, erased, and rewritten by using a recording layer in which a reversible phase transition can be caused between a crystalline phase and an amorphous phase. When such a recording layer is irradiated with a high-power laser beam and then cooled, the irradiated portion becomes an amorphous phase. Furthermore, when an amorphous portion of the recording layer is irradiated with a low-power laser beam and then gradually cooled, the irradiated portion changes to a crystalline phase. Therefore, in the phase-change optica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24G11B7/24035G11B7/24038G11B7/24062G11B7/2433G11B7/254G11B7/257G11B7/26
CPCG11B7/268G11B2007/25706G11B7/266G11B7/006G11B7/2534G11B2007/25716G11B7/2533G11B2007/2571G11B2007/24312G11B2007/25708G11B2007/25713G11B2007/25715G11B7/2531G11B7/259G11B2007/25711G11B7/252G11B2007/24314G11B2007/24316G11B7/24038G11B7/2433G11B7/26
Inventor 土生田晴比古长田宪一坂上嘉孝草田英夫
Owner PANASONIC CORP
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