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JPS6423440A - Stamper - Google Patents

Stamper

Info

Publication number
JPS6423440A
JPS6423440A JP17841787A JP17841787A JPS6423440A JP S6423440 A JPS6423440 A JP S6423440A JP 17841787 A JP17841787 A JP 17841787A JP 17841787 A JP17841787 A JP 17841787A JP S6423440 A JPS6423440 A JP S6423440A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
resist
part
exposed
high
recording
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17841787A
Inventor
Mamoru Sugimoto
Original Assignee
Seiko Epson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE:To obtain a stamper suitable for forming an optical recording medium with high carrier, low noise and high quality by selecting a groove width of a part (exposed part) of a positive resist coated on a glass master disk to be exposed, developed and removed wider than the groove width of the unexposed part with the resist remained thereupon in manufacturing an optical recording medium substrate. CONSTITUTION:The process is changed from a conventional process, the numerical aperture of an objective lens 3 is decreased to increase the exposure power. The objective lens 3 is offset and not focused to the resist 2 but placed in out of focus, the development time is extended and the post-bake temperature is raised. Through the constitution above, the resist 2 is deformed before and after the post bake but since the exposed part 1 with a signal written thereupon has a higher exposure power and longer development time, no remained resist exists. The border face of the resist/exposed part to which a ridge of the signal touches is cut sharply in terms of light and the width of the exposed part for signal recording is wide, then the carrier is high. In forming the substrate by using the stamper, the optical recording medium with low noise and high quality is obtained.
JP17841787A 1987-07-17 1987-07-17 Stamper Pending JPS6423440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17841787A JPS6423440A (en) 1987-07-17 1987-07-17 Stamper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17841787A JPS6423440A (en) 1987-07-17 1987-07-17 Stamper

Publications (1)

Publication Number Publication Date
JPS6423440A true true JPS6423440A (en) 1989-01-26

Family

ID=16048132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17841787A Pending JPS6423440A (en) 1987-07-17 1987-07-17 Stamper

Country Status (1)

Country Link
JP (1) JPS6423440A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518213A2 (en) * 1991-06-14 1992-12-16 MITSUI TOATSU CHEMICALS, Inc. Optical recording medium
US6890704B2 (en) * 1998-04-06 2005-05-10 Imation Corp. Reverse optical mastering for data storage disks

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518213A2 (en) * 1991-06-14 1992-12-16 MITSUI TOATSU CHEMICALS, Inc. Optical recording medium
EP0518213A3 (en) * 1991-06-14 1993-05-05 Mitsui Toatsu Chemicals, Inc. Optical recording medium
US5344682A (en) * 1991-06-14 1994-09-06 Mitsui Toatsu Chemicals, Inc. Optical recording medium
US6890704B2 (en) * 1998-04-06 2005-05-10 Imation Corp. Reverse optical mastering for data storage disks
US7952986B2 (en) 1998-04-06 2011-05-31 Imation Corp. Reverse optical mastering for data storage disk replicas
US8363534B2 (en) 1998-04-06 2013-01-29 Legger Col. A.B. Llc Reverse optical mastering for data storage disk replicas
US8593931B2 (en) 1998-04-06 2013-11-26 Legger Col. A.B. Llc Replica disk for data storage
USRE44633E1 (en) 1998-04-06 2013-12-10 Legger Col. A.B. Llc Reverse optical mastering for data storage disk replicas
US8705334B2 (en) 1998-04-06 2014-04-22 Legger Col. A.B. Llc Replica disk for data storage

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