JPS57198536A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS57198536A JPS57198536A JP56081295A JP8129581A JPS57198536A JP S57198536 A JPS57198536 A JP S57198536A JP 56081295 A JP56081295 A JP 56081295A JP 8129581 A JP8129581 A JP 8129581A JP S57198536 A JPS57198536 A JP S57198536A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- thickness
- metal powder
- nonmagnetic support
- recording medium
- 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
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
- G11B5/73929—Polyester substrates, e.g. polyethylene terephthalate comprising naphthalene ring compounds, e.g. polyethylene naphthalate substrates
Abstract
PURPOSE:To constitute a magnetic substance with very thin layer, by providing a subbing layer between a magnetic layer including a ferromagnetic metal powder and a nonmagnetic support. CONSTITUTION:On a nonmagnetic support such as polyethylene telephthalate, a subbing layer made of thermoplastic or thermosetting resin such as polyvinylchloride, binylidene chloride-acrylonitril copolymer, urethane rubber, chlorinated polypropylene, and mixture of polyvinyl formale and polyurethane, having about 0.5-5mu thickness. Further, a magnetic substance lalyer including feromagnetic metal powder, >= about 1,000 Oe of coercive force and <= about 2mu in thickness is provided on the background layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56081295A JPS57198536A (en) | 1981-05-28 | 1981-05-28 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56081295A JPS57198536A (en) | 1981-05-28 | 1981-05-28 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57198536A true JPS57198536A (en) | 1982-12-06 |
Family
ID=13742388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56081295A Pending JPS57198536A (en) | 1981-05-28 | 1981-05-28 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57198536A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59223935A (en) * | 1983-06-03 | 1984-12-15 | Tdk Corp | Magnetic recording medium |
JPS60164926A (en) * | 1984-02-08 | 1985-08-28 | Hitachi Maxell Ltd | Magnetic disk |
JPS6173235A (en) * | 1984-09-17 | 1986-04-15 | Hitachi Maxell Ltd | Magnetic recording medium |
JPS6292132A (en) * | 1985-10-18 | 1987-04-27 | Fuji Photo Film Co Ltd | Manufacture of magnetic recording medium |
JPS63187418A (en) * | 1987-01-30 | 1988-08-03 | Fuji Photo Film Co Ltd | Magnetic recording medium |
EP0797190A1 (en) | 1992-01-08 | 1997-09-24 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US5763046A (en) * | 1991-01-21 | 1998-06-09 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US5792548A (en) * | 1995-03-03 | 1998-08-11 | Tdk Corporation | Magnetic recording medium having a magnetic layer and an intermediate layer of specified composition |
US5906885A (en) * | 1995-03-28 | 1999-05-25 | Tdk Corporation | Magnetic recording medium |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946406A (en) * | 1972-09-05 | 1974-05-04 | ||
JPS5042813A (en) * | 1973-08-20 | 1975-04-18 | ||
JPS51144604A (en) * | 1975-06-09 | 1976-12-11 | Fuji Photo Film Co Ltd | Magnetic recorder process |
JPS5243404A (en) * | 1975-10-02 | 1977-04-05 | Fuji Photo Film Co Ltd | Magnetic recording media |
JPS5256509A (en) * | 1975-11-04 | 1977-05-10 | Tdk Corp | Magnetic recording material |
JPS5370397A (en) * | 1976-12-06 | 1978-06-22 | Fuji Photo Film Co Ltd | Strongly magnetic metallic powder, preparation of same and magneticrecording media emplying same |
JPS5572009A (en) * | 1978-11-27 | 1980-05-30 | Sony Corp | Preparation of magnetic powder |
JPS5613515A (en) * | 1979-07-16 | 1981-02-09 | Tdk Corp | Magnetic recording medium |
-
1981
- 1981-05-28 JP JP56081295A patent/JPS57198536A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946406A (en) * | 1972-09-05 | 1974-05-04 | ||
JPS5042813A (en) * | 1973-08-20 | 1975-04-18 | ||
JPS51144604A (en) * | 1975-06-09 | 1976-12-11 | Fuji Photo Film Co Ltd | Magnetic recorder process |
JPS5243404A (en) * | 1975-10-02 | 1977-04-05 | Fuji Photo Film Co Ltd | Magnetic recording media |
JPS5256509A (en) * | 1975-11-04 | 1977-05-10 | Tdk Corp | Magnetic recording material |
JPS5370397A (en) * | 1976-12-06 | 1978-06-22 | Fuji Photo Film Co Ltd | Strongly magnetic metallic powder, preparation of same and magneticrecording media emplying same |
JPS5572009A (en) * | 1978-11-27 | 1980-05-30 | Sony Corp | Preparation of magnetic powder |
JPS5613515A (en) * | 1979-07-16 | 1981-02-09 | Tdk Corp | Magnetic recording medium |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59223935A (en) * | 1983-06-03 | 1984-12-15 | Tdk Corp | Magnetic recording medium |
JPH0533444B2 (en) * | 1983-06-03 | 1993-05-19 | Tdk Electronics Co Ltd | |
JPS60164926A (en) * | 1984-02-08 | 1985-08-28 | Hitachi Maxell Ltd | Magnetic disk |
JPS6173235A (en) * | 1984-09-17 | 1986-04-15 | Hitachi Maxell Ltd | Magnetic recording medium |
JPS6292132A (en) * | 1985-10-18 | 1987-04-27 | Fuji Photo Film Co Ltd | Manufacture of magnetic recording medium |
JPH0559490B2 (en) * | 1985-10-18 | 1993-08-31 | Fuji Photo Film Co Ltd | |
JPS63187418A (en) * | 1987-01-30 | 1988-08-03 | Fuji Photo Film Co Ltd | Magnetic recording medium |
US5763046A (en) * | 1991-01-21 | 1998-06-09 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US5811172A (en) * | 1991-01-21 | 1998-09-22 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US5985408A (en) * | 1991-01-21 | 1999-11-16 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US6015602A (en) * | 1991-01-21 | 2000-01-18 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US6020022A (en) * | 1991-01-21 | 2000-02-01 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US6025082A (en) * | 1991-01-21 | 2000-02-15 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
EP0797190A1 (en) | 1992-01-08 | 1997-09-24 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
US5792548A (en) * | 1995-03-03 | 1998-08-11 | Tdk Corporation | Magnetic recording medium having a magnetic layer and an intermediate layer of specified composition |
US5906885A (en) * | 1995-03-28 | 1999-05-25 | Tdk Corporation | Magnetic recording medium |
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