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Method for cleaning main carrier

A carrier and cleaning technology, which is applied in the manufacture of record carriers, accessories of record carriers, refurbishment/cleaning record carriers, etc., can solve the problems that it is difficult to completely remove signal pattern foreign objects, it is difficult to make reliable discs, and attachments cannot be removed, so as to prevent Deterioration of transcription signal, improvement of reliability, effects of reducing adhesion

Inactive Publication Date: 2002-12-25
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Moreover, since the optical disc is not cleaned in the middle of molding, and the optical disc is continuously formed, if the number of molding sheets exceeds 1000, as with the magnetic transcription master carrier, the resulting optical disc will be damaged due to the adhesion of foreign matter. The error rate tends to increase, making it difficult to produce highly reliable discs
[0015] According to the above, the partial cleaning of the main carrier for optical discs can use electrolytic degreasing, ultrasonic cleaning with cleaning agents, or ozone cleaning devices, etc., but sometimes the firmly attached deposits cannot be removed.
In particular, it is difficult to completely remove foreign matter in the concavity of the concavo-convex portion of the signal pattern, which causes molding failure.

Method used

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Embodiment Construction

[0039] Next, each embodiment of the present invention will be described in detail. FIG. 1 is a schematic structural view of a cleaning device implementing a cleaning method according to an embodiment.

[0040] The cleaning device shown in Fig. 1 comprises: the decompression container 3 (vacuum container) that accepts main carrier 2; Make the decompression device 4 of decompression in container 3; A discharge device 5 for plasma discharge; a gas introduction device 6 for introducing reactive gas into the container 3 .

[0041] In addition, the cleaning method using the device 1 is to non-contactly remove the attached material on the surface of the main carrier 2 for magnetic transcription or optical disk before performing magnetic transcription or optical disk molding in a dry process using reactive plasma etching. The method of attaching things. That is, a reactive gas is introduced under a reduced pressure state, followed by discharge, and the deposits on the surface of the...

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Abstract

A method for cleaning a main carrier, comprising storing a main carrier (2) for magnetic transcription or optical discs before magnetic transcription or optical disc molding in a decompression container (3), and using a decompression device (4) to make the container (3) The internal pressure is reduced, the reactive gas is introduced into the container (3) through the gas introduction device (6), and in this state, the plasma discharge is generated between the electrode (52) and the main carrier (2) through the discharge device (5) , removing attachments on the surface of the main carrier (2) by plasma etching and burning. In this way, the attachment on the main carrier is removed by dry processing and non-contact without reattachment, thereby performing magnetic transcription with high transcription quality.

Description

technical field [0001] The present invention relates to a method for cleaning a master carrier for magnetic transcription used in magnetic transcription or a master carrier for optical discs used in optical disc molding. Background technique [0002] The magnetic transcription method is to apply a magnetic field for transcription under the state that the information bearing surface of the master carrier carrying the transcription information through the fine concave-convex pattern of the magnetic body is in close contact with the slave medium having the magnetic recording part that accepts the transcription, and the magnetic field will be applied to the master carrier. A method of transcribing and recording the magnetization pattern corresponding to the transcribed information (such as a servo signal) carried on the slave medium. Such a magnetic transcription method is disclosed in, for example, JP-A-63-183623, JP-A-10-40544, JP-A-10-269566, and the like. [0003] The maste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/84G11B5/86G11B23/50
CPCG11B5/865G11B23/505Y10T156/1922G11B5/84
Inventor 西川正一镰谷彰人
Owner FUJIFILM CORP
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