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Method for producing master for optical information recording medium

A technology for storage media and manufacturing methods, applied in information storage, arrangement of discrete information storage, recording information storage, etc., capable of solving problems such as difficulties in tilt angles

Inactive Publication Date: 2005-02-02
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to freely control the tilt angle in the original recording of optical information storage media, not only thermal mode recording method, but also photon mode recording method.

Method used

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  • Method for producing master for optical information recording medium
  • Method for producing master for optical information recording medium
  • Method for producing master for optical information recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0048] control Figure 1 to Figure 4 , as Embodiment 1, a method of manufacturing an optical information storage medium original disk using a recording original disk provided with a recording auxiliary layer between a heat-sensitive material layer and a substrate will be described. figure 1 (A) shows a cross-sectional view of an example of a recording master disk. figure 1 In the recording master disk 104 shown in (A), the substrate 101 is made of glass, silicon, or resin. On this substrate 101, a recording auxiliary layer 102 made of a material such as a dielectric or resin is formed by a method such as sputtering or centrifugal coating. A thermosensitive material layer 103 is formed on the recording auxiliary layer 102 and brought into contact with the recording auxiliary layer 102 . The heat-sensitive material layer 103 is made of a substance whose state changes due to the temperature rise caused by exposure, by methods such as sputtering or centrifugal coating. The re...

Embodiment approach 2

[0066] control Figure 5 , a second embodiment of a method of manufacturing a master disk using a recording master disk in which a recording auxiliary layer is disposed on the upper surface of the heat-sensitive material layer (the surface farther from the substrate) will be described. Figure 5 (A) shows an example of an original recording disc. The recording master disk 504 has a substrate 501 provided with a thermosensitive material layer 502 , and a recording auxiliary layer 503 provided on the thermosensitive material layer 502 . Figure 5 506 in (A) refers to the external medium (that is, the ambient gas during exposure), which is generally air. The material and manufacturing method of the substrate 501 and the heat-sensitive material layer 502 that constitute the recording master are the same as those described in the first embodiment. The recording auxiliary layer 503 may be a film formed using the materials and methods described in the related descriptions in Embodi...

Embodiment approach 3

[0073] control Figure 6 , to describe a method of manufacturing a master disk using a recording master disk in which a heat-sensitive material layer is sandwiched between two recording auxiliary layers—Embodiment 3. Figure 6 (A) shows an example of an original recording disc. The recording original disk 605 has a first recording auxiliary layer 602 disposed on its substrate 601, a heat sensitive material layer 603 is disposed on the first recording auxiliary layer 602, and a second recording auxiliary layer 604 is disposed on the heat sensitive material layer 603. . The material and manufacturing method of the substrate 601 and the heat-sensitive material layer 603 of the recording original disk constituent part are the same as those described in the first embodiment. In addition, the first recording auxiliary layer 602 and the second recording auxiliary layer 604 are also made using the materials and methods described in the first embodiment. The second recording auxilia...

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Abstract

According to the present invention, a cross-sectional shape of a concave-convex pattern formed on a master for an optical information recording medium can be easily controlled using heat-mode recording. The cross-sectional shape of the concavo-convex patter is controlled by using a master substrate which includes a substrate 101, a thermosensitive material layer 102 whose state is changed by exposure, and at least one recording-auxiliary layer 103 which is disposed in contact with the thermosensitive material layer 102, and selecting a thermal conductivity, an optical constant and a thickness of the recording-auxiliary layer 103 so as to thermally and optically control a condition of the thermosensitive material layer during the exposure.

Description

technical field [0001] The present invention relates to a manufacturing method of an optical information storage medium using thermal mode recording in order to form a concavo-convex pattern on a recording original disc. Background technique [0002] control Figure 10 A conventional master manufacturing method and a stamper manufacturing method of an optical information storage medium will be described. First, a film-like photoresist 1002 is covered on the substrate 1001 to make a recording master disk 1003 . By using laser light or electron beam etc. (recording light) 1010 to expose this recording master disk 1003, form the latent image 1004 ( Figure 10 (A)). The desired pattern recorded in the form of latent image 1004 is etched on the original disk after exposure, and the original disk 1005 ( Figure 10 (B)). In the manufacture of the original disk of DVD and its descendants optical information storage media, ultraviolet laser is generally used for exposure, and alkal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007G11B7/013G11B7/24G11B7/24076G11B7/24085G11B7/26
CPCG11B7/24085G11B7/24076G11B7/24G11B7/263G11B7/261A47G19/02A47G2400/025
Inventor 伊藤英一大野锐二
Owner PANASONIC CORP
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