JPS56119947A - Information recording disc - Google Patents
Information recording discInfo
- Publication number
- JPS56119947A JPS56119947A JP2209680A JP2209680A JPS56119947A JP S56119947 A JPS56119947 A JP S56119947A JP 2209680 A JP2209680 A JP 2209680A JP 2209680 A JP2209680 A JP 2209680A JP S56119947 A JPS56119947 A JP S56119947A
- Authority
- JP
- Japan
- Prior art keywords
- film
- reflection
- laser light
- recording disc
- transparent
- 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
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052797 bismuth Inorganic materials 0.000 abstract 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE:To perform accurate recording by laminating the 1st reflection film which permits information recording through changing of reflectance and refractive index, a transparent film of which depth is 1/4 wavelength, the 2nd reflection film which is segmented to sectors and formed with concentrical grooves in each sector and a transparent protection film. CONSTITUTION:A sbstrate 1 of a recording disc is a base table which supports the main parts of the recording disc and the 1st reflection film 2, a transparent film 3, the 2nd reflection film 4 and a trasparent protective film 5 are laminated thereon in this order. The film 2 is made of manganese, bismuth etc. of which the characteristics such as reflectance and refractive index is changed by controlling the rate of irradiation of laser light, and the film 4 is made of aluminum or the like which makes simple reflection of laser light. The film 3 is formed to the depth at which a phase difference of 1/4 wavelength of laser light is formed, and the film 4 is segmented to sectors, and is formed with concentrical grooves 6 for every track. With such constitution, the use of a deflector enables the light beam to follow up the tracks with high accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2209680A JPS56119947A (en) | 1980-02-23 | 1980-02-23 | Information recording disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2209680A JPS56119947A (en) | 1980-02-23 | 1980-02-23 | Information recording disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56119947A true JPS56119947A (en) | 1981-09-19 |
Family
ID=12073339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2209680A Pending JPS56119947A (en) | 1980-02-23 | 1980-02-23 | Information recording disc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56119947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2531798A1 (en) * | 1981-08-17 | 1984-02-17 | Rca Corp |
-
1980
- 1980-02-23 JP JP2209680A patent/JPS56119947A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2531798A1 (en) * | 1981-08-17 | 1984-02-17 | Rca Corp |
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