JPS6470939A - Optical card and its production - Google Patents
Optical card and its productionInfo
- Publication number
- JPS6470939A JPS6470939A JP62227586A JP22758687A JPS6470939A JP S6470939 A JPS6470939 A JP S6470939A JP 62227586 A JP62227586 A JP 62227586A JP 22758687 A JP22758687 A JP 22758687A JP S6470939 A JPS6470939 A JP S6470939A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- optical card
- faces
- card
- decreased
- 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
- Credit Cards Or The Like (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
PURPOSE:To increase a memory capacity and to enable the prevention of deformation of a substrate, the mass production of an optical card and the reduction of the cost thereof by pressing mold materials formed with guide grooves for light beam tracking and information patterns for specifying bits to both faces of the optical card substrate. CONSTITUTION:The guide grooves and preformats are pressed onto the optical card substrate 12 from both faces by stampers 11a, 11b and, therefore, distortion are decreased and the warpage deformation of the substrate 12 is eliminated as compared to the case of pressing the same from one side. The off-tracking of the light beam fore recording and reproducing stopped down to micron order is thereby prevented and focusing errors are decreased. Since the card patterns are simultaneously formed on both faces of the substrate, the recording capacity is increased and the mass production is enabled; in addition, the cost of the card is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62227586A JPS6470939A (en) | 1987-09-11 | 1987-09-11 | Optical card and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62227586A JPS6470939A (en) | 1987-09-11 | 1987-09-11 | Optical card and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6470939A true JPS6470939A (en) | 1989-03-16 |
Family
ID=16863238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62227586A Pending JPS6470939A (en) | 1987-09-11 | 1987-09-11 | Optical card and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6470939A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010113592A1 (en) * | 2009-03-31 | 2010-10-07 | 日本電気株式会社 | Method for manufacturing optical information recording medium, and optical information recording medium |
-
1987
- 1987-09-11 JP JP62227586A patent/JPS6470939A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010113592A1 (en) * | 2009-03-31 | 2010-10-07 | 日本電気株式会社 | Method for manufacturing optical information recording medium, and optical information recording medium |
US8568851B2 (en) | 2009-03-31 | 2013-10-29 | Nec Corporation | Method for manufacturing optical information recording medium, and optical information recording medium |
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