JPS56156929A - Production of magnetic recording tape - Google Patents
Production of magnetic recording tapeInfo
- Publication number
- JPS56156929A JPS56156929A JP6090980A JP6090980A JPS56156929A JP S56156929 A JPS56156929 A JP S56156929A JP 6090980 A JP6090980 A JP 6090980A JP 6090980 A JP6090980 A JP 6090980A JP S56156929 A JPS56156929 A JP S56156929A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- laser beam
- magnetic
- ferromagnetic region
- irradiated
- 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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers
-
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/855—Coating only part of a support with a magnetic layer
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To obtain a magnetic tape which is suited for a precision analog and digital recording, by giving a partial heating and annealing to a paramagnetic alloy tape to cause a phase transformation to the heated part into a ferromagnetic region. CONSTITUTION:The YAG laser beam, the electron beam, etc. is irradiated in a belt or bit train form to the tape surface 1 of a paramagnetic alloy of Fe-Co-Mn-Cr, etc. to cause a phase transformation. Thus a ferromagnetic region 2 is obtained at the heated part. The laser beam irradiation surface is covered with the argon gas, and the other side of the surface is water-cooled. The laser beam is irradiated to the tape with the laser beam diameter restricted to a desired value while giving a travelling to the tape in a certain speed. Owing to a consecutive ferromagnetic region, a magnetic tape is obtained with an excellent surface condition, smoothness and travelling performance plus a high mechanical strength. In the same way, a magnetic recording disk, a magnetic card, etc. can be obtained by forming an annealed region.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6090980A JPS56156929A (en) | 1980-05-08 | 1980-05-08 | Production of magnetic recording tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6090980A JPS56156929A (en) | 1980-05-08 | 1980-05-08 | Production of magnetic recording tape |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56156929A true JPS56156929A (en) | 1981-12-03 |
Family
ID=13155961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6090980A Pending JPS56156929A (en) | 1980-05-08 | 1980-05-08 | Production of magnetic recording tape |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56156929A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63229618A (en) * | 1987-03-18 | 1988-09-26 | Tokyo Jiki Insatsu Kk | Magnetic card and its production |
US20140332118A1 (en) * | 2005-05-27 | 2014-11-13 | Philip Morris Usa Inc. | Intermetallic magnetically readable medium |
-
1980
- 1980-05-08 JP JP6090980A patent/JPS56156929A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63229618A (en) * | 1987-03-18 | 1988-09-26 | Tokyo Jiki Insatsu Kk | Magnetic card and its production |
US20140332118A1 (en) * | 2005-05-27 | 2014-11-13 | Philip Morris Usa Inc. | Intermetallic magnetically readable medium |
US10489615B2 (en) * | 2005-05-27 | 2019-11-26 | Philip Morris Usa Inc. | Intermetallic magnetically readable medium |
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