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Optical disc manufacturing method, disc master manufacturing method, and optical disc

A manufacturing method and optical disc technology, applied in the direction of optical record carrier manufacturing, optical record carrier, etc., can solve the problem of increasing resolution, etc.

Inactive Publication Date: 2009-10-28
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In contrast, in the mastering process of Blu-ray discs, cutting is performed by using resists based on inorganic materials, which may significantly increase the resolution

Method used

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  • Optical disc manufacturing method, disc master manufacturing method, and optical disc
  • Optical disc manufacturing method, disc master manufacturing method, and optical disc
  • Optical disc manufacturing method, disc master manufacturing method, and optical disc

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Embodiment Construction

[0063] Embodiments of the present invention will be described according to the following order:

[0064] [1. Disc manufacturing process],

[0065] [2. Mastering using inorganic resist],

[0066] [3. The disc to be manufactured], and

[0067] [4. Verification]

[0068] [1. Disc manufacturing process]

[0069] First refer to Figure 1A ~ Figure 1J A schematic diagram is shown to describe the process used to manufacture an optical disc.

[0070] Figure 1A A master forming substrate 100 providing a disc master is shown. For example, the mastering substrate 100 may be made of a silicon wafer or quartz.

[0071] Such as Figure 1B As shown, a heat storage layer 101 and an inorganic resist layer 102 are deposited on a master forming substrate 100 by sputtering.

[0072] Next, if Figure 1C As shown, the resulting resist layer is photosensitive by performing selective exposure corresponding to the pit array (used as a recording signal pattern) on the inorganic resist layer ...

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Abstract

An optical-disc manufacturing method including the steps of: fabricating a pre-exposure disc master by forming, on a substrate, a heat accumulation layer having a thickness of 17% or less of a recording-laser wavelength and forming an inorganic resist layer; performing exposure of a recording-signal pattern having pits and spaces with respect to the inorganic resist layer of the disc master, by performing recording-laser light irradiation; fabricating a disc master having a pit-array shape having pits and spaces, by performing development processing after the exposure; manufacturing a stamper to which the pit-array shape is transferred, by using the disc master having the pit-array shape; and manufacturing an optical disc having a predetermined layer structure including a recording layer to which the pit-array shape of the stamper is transferred and in which a silver or silver-alloy reflective film is formed on the pit-array shape.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Priority Patent Application JP 2008-110468 filed in the Japan Patent Office on Apr. 21, 2008, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to an optical disc manufacturing method, a master disc manufacturing method, and an optical disc, which are preferably used for manufacturing high-density optical discs. Background technique [0004] In recent years, with the increase in the recording density of optical discs, for example, Blu-ray (Blu-ray discs) are becoming popular as high-density discs. [0005] For DVD (Digital Versatile Disc), which has been widely used, the recording capacity of one DVD (one recording layer) is 4.7 GB (Gigabyte). On the contrary, the recording capacity of one Blu-ray Disc is 25 GB, and its recording capacity is significantly increased. [0006] This i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/26G11B7/24G11B7/24085
CPCG11B7/26
Inventor 高桥谦作中野淳增原慎坂本哲洋高川繁树
Owner SONY CORP
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