JPS641135A - Master disk for optical disk - Google Patents
Master disk for optical diskInfo
- Publication number
- JPS641135A JPS641135A JP15708087A JP15708087A JPS641135A JP S641135 A JPS641135 A JP S641135A JP 15708087 A JP15708087 A JP 15708087A JP 15708087 A JP15708087 A JP 15708087A JP S641135 A JPS641135 A JP S641135A
- Authority
- JP
- Japan
- Prior art keywords
- specular
- face
- metallic mold
- master disk
- disk
- 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 obviate the generation of flaws in a master disk and metallic mold with a smaller number of injection times and to increase the service lifetime of both by providing an information recording face and a specular face which is so worked as to form prescribed slight recesses on the surface.
CONSTITUTION: The information recording surface 2 which is transferred to an optical disk substrate 1 provided between the same and a 1st metallic mold and the specular face 7 which is imposed on the 2nd metallic mold having the specular face 7 and is so worked as to form the prescribed slight recesses on the surface are provided. Namely, the prescribed slight recesses formed on the specular surface 7 of the master disk 1 decrease the contact area of the master disk 1 and the specular face 7 of the metallic mold in contact therewith, thereby lessening the adhesion between both and the generation of flaws between both by repetition of friction. The generation of the flaws on the specular face of the metallic mold and the worked specular face 7 of the master disk 1 is thereby prevented and the lifetime of both is increased.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15708087A JPS641135A (en) | 1987-06-23 | 1987-06-23 | Master disk for optical disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15708087A JPS641135A (en) | 1987-06-23 | 1987-06-23 | Master disk for optical disk |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH011135A JPH011135A (en) | 1989-01-05 |
JPS641135A true JPS641135A (en) | 1989-01-05 |
Family
ID=15641809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15708087A Pending JPS641135A (en) | 1987-06-23 | 1987-06-23 | Master disk for optical disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS641135A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19924024B4 (en) * | 1998-05-27 | 2008-06-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Kobe | Continuous kneading machine, rotor used therein and use of the rotor |
-
1987
- 1987-06-23 JP JP15708087A patent/JPS641135A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19924024B4 (en) * | 1998-05-27 | 2008-06-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Kobe | Continuous kneading machine, rotor used therein and use of the rotor |
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