JPS57147145A - Information recorder and reproducer - Google Patents
Information recorder and reproducerInfo
- Publication number
- JPS57147145A JPS57147145A JP3199781A JP3199781A JPS57147145A JP S57147145 A JPS57147145 A JP S57147145A JP 3199781 A JP3199781 A JP 3199781A JP 3199781 A JP3199781 A JP 3199781A JP S57147145 A JPS57147145 A JP S57147145A
- Authority
- JP
- Japan
- Prior art keywords
- conductive layer
- disc
- tip
- coated
- stylus
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To achieve easy manufacture of an information recording disc and to increase the performance, by providing a dielectric substance layer to give a static capacitance in response to uneven pattern on the information recording disc between the disc and a reproducing stylus at the side of the stylus. CONSTITUTION:A conductive layer 12 is coated on an insulating base 11 formed with uneven pattern corresponding to the information on the surface of an information recording disc 11 and a wear-proof member 13 is coated. On the stylus 2, a conductive layer 22 and a dielectric substance layer 23 are coated on the side of an insulation base 21. A tip 22a of the conductive layer is backwarded than a tip 21a of the base 21. The layer 23 is coated on the base between the conductive layer 22 and the tip 22a of the conductive layer. In this reproducing device, when the tip of the stylus 2 is contacted on the surface of the disc 1 and moved relatively, an electric signal can be picked up as a change in the static capacitance in response to the uneven pattern on the disc 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3199781A JPS57147145A (en) | 1981-03-06 | 1981-03-06 | Information recorder and reproducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3199781A JPS57147145A (en) | 1981-03-06 | 1981-03-06 | Information recorder and reproducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57147145A true JPS57147145A (en) | 1982-09-10 |
Family
ID=12346543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3199781A Pending JPS57147145A (en) | 1981-03-06 | 1981-03-06 | Information recorder and reproducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57147145A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0840308A1 (en) * | 1995-07-19 | 1998-05-06 | Sony Corporation | Recording medium, information reproducing device, information recording device, and information recording/reproducing device |
| US7122237B2 (en) | 2000-11-24 | 2006-10-17 | Ngk Insulators, Ltd. | Honeycomb filter and method for manufacturing the same |
-
1981
- 1981-03-06 JP JP3199781A patent/JPS57147145A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0840308A1 (en) * | 1995-07-19 | 1998-05-06 | Sony Corporation | Recording medium, information reproducing device, information recording device, and information recording/reproducing device |
| EP0840308A4 (en) * | 1995-07-19 | 1999-07-14 | Sony Corp | Recording medium, information reproducing device, information recording device, and information recording/reproducing device |
| US6157610A (en) * | 1995-07-19 | 2000-12-05 | Sony Corporation | Recording medium, information reproducing apparatus, information recording device, and information recording and reproducing apparatus |
| US7122237B2 (en) | 2000-11-24 | 2006-10-17 | Ngk Insulators, Ltd. | Honeycomb filter and method for manufacturing the same |
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