JPS56145536A - Recording and reproducing method for information signal and recording medium and pickup used for this - Google Patents
Recording and reproducing method for information signal and recording medium and pickup used for thisInfo
- Publication number
- JPS56145536A JPS56145536A JP4840980A JP4840980A JPS56145536A JP S56145536 A JPS56145536 A JP S56145536A JP 4840980 A JP4840980 A JP 4840980A JP 4840980 A JP4840980 A JP 4840980A JP S56145536 A JPS56145536 A JP S56145536A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- parts
- recording
- nonmagnetic
- reproducing
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/743—Patterned record carriers, wherein the magnetic recording layer is patterned into magnetic isolated data islands, e.g. discrete tracks
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Magnetic Record Carriers (AREA)
- Digital Magnetic Recording (AREA)
- Magnetic Heads (AREA)
Abstract
PURPOSE:To provide a novel method of recording and reproducing by alternately disposing substantially magnetic parts and nonmagnetic parts on the surface of a recording medium, recording information signals therein, applying a magnetic field, thereto and detecting the differences in the magnetic reluctance between the magnetic parts and nonmagnetic parts as current changes. CONSTITUTION:Pits 2 of 0.5- several mum lengths and 0.1-0.2mum depths are formed spirally or concentrically on a disc substrate 1 of a vinyl chloride base resin, and a magnetic material layer 3 of nickel metals or the like is formed on the surface thereof. Consequently, the inormation consisting substantially of magnetic raised parts and nonmagnetic recessed parts is recorded. A pickup consists of a magnetic body 31 having a gap 33, a coil 34 wound to this, a permanent magnet 32 and a nonmagnetic protecting member 38. When the disc rotates in an arrow (b) direction, the magnetic reluctance of the pickup changes in the magnetic parts and the nonmagnetic parts 2 and this change is detected as a change in the current of the coil 34. Thereby, the novel method of recording and reproducing is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4840980A JPS56145536A (en) | 1980-04-11 | 1980-04-11 | Recording and reproducing method for information signal and recording medium and pickup used for this |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4840980A JPS56145536A (en) | 1980-04-11 | 1980-04-11 | Recording and reproducing method for information signal and recording medium and pickup used for this |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24720983A Division JPS59229757A (en) | 1983-12-26 | 1983-12-26 | Pickup for reproduction of information signal |
| JP11694784A Division JPS6035347A (en) | 1984-06-07 | 1984-06-07 | Pickup |
| JP11694884A Division JPS6035348A (en) | 1984-06-07 | 1984-06-07 | Recording medium for high density information signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56145536A true JPS56145536A (en) | 1981-11-12 |
Family
ID=12802498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4840980A Pending JPS56145536A (en) | 1980-04-11 | 1980-04-11 | Recording and reproducing method for information signal and recording medium and pickup used for this |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56145536A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0120990A2 (en) * | 1983-03-31 | 1984-10-10 | International Business Machines Corporation | Read-only magnetic recording media and process of making the same |
| JPH02297081A (en) * | 1989-05-12 | 1990-12-07 | Mineruba:Kk | Magnetic head |
| US5995309A (en) * | 1995-03-06 | 1999-11-30 | Mitsubishi Denki Kabushiki Kaisha | Magnetic recording medium |
-
1980
- 1980-04-11 JP JP4840980A patent/JPS56145536A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0120990A2 (en) * | 1983-03-31 | 1984-10-10 | International Business Machines Corporation | Read-only magnetic recording media and process of making the same |
| JPH02297081A (en) * | 1989-05-12 | 1990-12-07 | Mineruba:Kk | Magnetic head |
| US5995309A (en) * | 1995-03-06 | 1999-11-30 | Mitsubishi Denki Kabushiki Kaisha | Magnetic recording medium |
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