Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for manufacturing optical recording medium base disk and manufacturing device

A technology of optical recording medium and manufacturing method, applied in the fields of optical recording carrier manufacture, optical recording carrier, recording/reproducing by optical method, etc.

Inactive Publication Date: 2003-10-01
PANASONIC CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Moreover, the switching of the groove pitch must be completed within the setting range between each area, and it must be synchronized with the signal used to form the grooves of each area.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for manufacturing optical recording medium base disk and manufacturing device
  • Method for manufacturing optical recording medium base disk and manufacturing device
  • Method for manufacturing optical recording medium base disk and manufacturing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The mastering method of the optical recording medium of the present invention is a method of forming a predetermined signal area by irradiating recording light such as laser light on a rotating disc substrate for mastering and performing exposure processing. The recording light is modulated or deflected to form a predetermined signal area, and is irradiated while moving in the radial direction of the disk substrate. During irradiation of the recording light, the rotational speed of the disk substrate and the moving speed of the recording light are controlled according to the track pitch in each signal area.

[0014] The present invention is particularly applicable to the case where a plurality of signal areas having different track pitches are formed on a disc substrate. The present invention is characterized in that grooves with different pitches are continuously formed at the boundary portion between different signal regions. As a result, signals corresponding to a p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
wavelengthaaaaaaaaaa
Login to View More

Abstract

Generates modulated or deflected recording light for forming a predetermined signal area on a disc substrate for mastering, and moves the recording light in the radial direction on the rotating substrate coated with a photosensitive material Irradiate. In the irradiation of the recording light, control is performed based on the track pitch in the signal area so that the rotation speed of the disk substrate and the moving speed of the recording light have a predetermined relationship. The recording light is continuously modulated or deflected according to signals using signals corresponding to a plurality of signal areas different in track pitch, and is irradiated on the disk substrate. When the signal areas are switched, based on the track pitch in the next signal area, the relationship between the rotation speed of the disc substrate and the moving speed of the recording light is changed, thereby changing the track pitch.

Description

technical field [0001] The present invention relates to a method for manufacturing a master disk for optical recording media such as optical discs, in particular, a method for manufacturing a master disk for an optical recording medium suitable for a plurality of signal areas with different track pitches, and its manufacturing device. Background technique [0002] In an optical disc, information is recorded in an area where a spiral groove is formed, or the recorded information is reproduced by an optical head. In a recording area where one track is continuous on a conventional optical disc, the pitch of the formed tracks (track pitch) is fixed. For example, on a DVD-RAM disc, the track pitches of the playback-only area where control data is recorded and the playback information area are different, but the tracks in these two areas are discontinuous. Therefore, when each area is formed on an optical disc master for manufacturing an optical disc, it is only necessary to reco...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007G11B7/26
CPCG11B7/24079G11B7/261G11B7/26
Inventor 阿部伸也佐藤秀二
Owner PANASONIC CORP