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Manufacturing method of optical disk and its manufacturing apparatus

A manufacturing method and technology for manufacturing devices, which are applied in the directions of optical record carrier manufacturing, lamination devices, chemical instruments and methods, etc., can solve the problems of lack of repeatability, provide high quality, and be difficult to ensure, and achieve the effect of suppressing air bubbles

Inactive Publication Date: 2007-03-28
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] However, in the vacuum bonding method, the operation of the stamper shown in FIG. 16A that can suppress the generation of air bubbles is accidental and lacks repeatability, so it is difficult to ensure that the generation of air bubbles can be suppressed to provide stable high quality. CD

Method used

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  • Manufacturing method of optical disk and its manufacturing apparatus
  • Manufacturing method of optical disk and its manufacturing apparatus
  • Manufacturing method of optical disk and its manufacturing apparatus

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Embodiment Construction

[0060] One embodiment of the present invention is described below with reference to the accompanying drawings. Referring to FIG. 1, a high-density optical disc is described, which is manufactured by a manufacturing method according to an embodiment of the present invention.

[0061] In such an optical disc, an information signal is recorded and reproduced by irradiating a laser beam from the protective layer 15 side to the information recording layer. For example, the laser beam has a wavelength of 400nm to 410nm, is converged at one point by an objective lens 16 with a numerical aperture of 0.84 to 0.86, and irradiates the L0 layer or the L1 layer as an information recording layer from the protective layer 15 side, thereby recording or reproducing information Signal.

[0062] This high-density optical disc has a structure in which an L0 layer, an intermediate layer 12, an L1 layer, and a protective layer 15 are sequentially stacked on a substrate 11. The protective layer 15...

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Abstract

A manufacturing method of an optical disk in which information recording layers are formed onto a resin layer laminated on a substrate surface. The substrate surface is coated with the resin layer. The substrate and a stamper are arranged into a vacuum chamber so that the resin layer surface and the stamper surface with concave / convex portions face almost in parallel. The chamber is set into an almost vacuum state while holding the facing state of the substrate and the stamper. The chamber is changed from the almost vacuum state to an atmospheric pressure or higher. The substrate and the stamper are overlaid. The stamper is pressed by a differential pressure between the almost vacuum pressure and the atmospheric pressure or higher, thereby adhering the substrate and the stamper and transferring the concave / convex portions to the resin layer. The resin layer with the transferred concave / convex portions is hardened.

Description

technical field [0001] The present invention relates to an optical disc manufacturing method and an optical disc manufacturing apparatus, and more particularly, to an optical disc manufacturing method and an optical disc manufacturing apparatus applied to, for example, a multilayer optical disc including two or more information recording layers. Background technique [0002] In recent years, in the field of optical discs, optical discs with a large recording capacity have been demanded. In order to realize a large recording capacity, it is desirable to use a multilayer optical disc having a plurality of information recording layers (refer to Patent Document JP-A-2003-91868). Among them, an optical disc including two information recording layers may be the first to be put into practical use. In a read-only optical disc, a reflective film made of silver, aluminum, or the like is formed. In a recordable optical disc, a recording film made of, for example, a phase-change type ...

Claims

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Application Information

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IPC IPC(8): G11B7/26B32B37/10
Inventor 渡辺英俊秋山昭次
Owner SONY CORP
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