JPS6423434A - Optical card medium - Google Patents
Optical card mediumInfo
- Publication number
- JPS6423434A JPS6423434A JP62179126A JP17912687A JPS6423434A JP S6423434 A JPS6423434 A JP S6423434A JP 62179126 A JP62179126 A JP 62179126A JP 17912687 A JP17912687 A JP 17912687A JP S6423434 A JPS6423434 A JP S6423434A
- Authority
- JP
- Japan
- Prior art keywords
- groove parts
- polycarbonate
- film thickness
- recording layer
- substrate
- 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)
Abstract
PURPOSE:To improve performance and to obtain high-quality guide groove signals by providing a recording layer of a prescribed film thickness to the groove parts and non-groove parts of guide grooves having a prescribed depth and width. CONSTITUTION:The guide grooves 7 having the depth d=2,000-5,000Angstrom and 10,000-100,000Angstrom width are formed on a substrate (for example, polycarbonate) 1 by using a metallic mold 5. The diacetone alcohol soln. of the polymethine dye expressed by the formula is coated thereon by a gravure coating method to form the recording layer 2. The film thickness of the groove parts 7 is specified to >=1,500Angstrom and the film thickness of the non-groove parts to 800-1,200Angstrom . A protective substrate 4 (polycarbonate) is then laminated thereon by using an adhesive agent 3, by which the optical card medium is obtd. Polymethyl methacrylate, polystyrene, polyvinyl chloride, etc., are usable in addition to polycarbonate, as the substrate 1. Suitable additives may be added to the recording layer 2.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179126A JPS6423434A (en) | 1987-07-20 | 1987-07-20 | Optical card medium |
US07/121,041 US4972402A (en) | 1986-11-20 | 1987-11-16 | Optical card |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179126A JPS6423434A (en) | 1987-07-20 | 1987-07-20 | Optical card medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6423434A true JPS6423434A (en) | 1989-01-26 |
Family
ID=16060447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62179126A Pending JPS6423434A (en) | 1986-11-20 | 1987-07-20 | Optical card medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6423434A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0694914A1 (en) | 1994-07-25 | 1996-01-31 | Canon Kabushiki Kaisha | Information recording medium and method for recording and reproducing thereof |
JP2006335396A (en) * | 2005-05-31 | 2006-12-14 | Shirouma Science Co Ltd | Container mouth sealing mechanism |
-
1987
- 1987-07-20 JP JP62179126A patent/JPS6423434A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0694914A1 (en) | 1994-07-25 | 1996-01-31 | Canon Kabushiki Kaisha | Information recording medium and method for recording and reproducing thereof |
US5682375A (en) * | 1994-07-25 | 1997-10-28 | Canon Kabushiki Kaisha | Information recording medium and method for recording and reproducing thereof |
JP2006335396A (en) * | 2005-05-31 | 2006-12-14 | Shirouma Science Co Ltd | Container mouth sealing mechanism |
US8757410B2 (en) | 2005-05-31 | 2014-06-24 | Hosokawa Yoko Co., Ltd. | Sealing mechanism for a cylindrical container opening using a cap having a cap body and an upper lid |
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