JPS6423440A - Stamper - Google Patents
StamperInfo
- 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
- Japan
- Prior art keywords
- resist
- exposed part
- recording medium
- optical recording
- exposed
- 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
Links
Landscapes
- Manufacturing Optical Record Carriers (AREA)
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.
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 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)
| 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 |
-
1987
- 1987-07-17 JP JP17841787A patent/JPS6423440A/en active Pending
Cited By (9)
| 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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