JPS56156929A - Production of magnetic recording tape - Google Patents

Production of magnetic recording tape

Info

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
Application number
JP6090980A
Other languages
Japanese (ja)
Inventor
Osamu Myoga
Hitoshi Igarashi
Atsushi Kawai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6090980A priority Critical patent/JPS56156929A/en
Publication of JPS56156929A publication Critical patent/JPS56156929A/en
Pending legal-status Critical Current

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.
JP6090980A 1980-05-08 1980-05-08 Production of magnetic recording tape Pending JPS56156929A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
SU1001864A3 (en) Method for producing electric sheet steel with oriented texture
JPS51151215A (en) Process for manufacturing non-oriented silicon steel plate with low co re loss and high magnetic flux density
JPS52122213A (en) Production of ferromagnetic metal powder
JPS5418709A (en) Production of magnetic recording media
JPS56156929A (en) Production of magnetic recording tape
JPS5633810A (en) Preparation of magnetic recording medium
JPS56137516A (en) Wear resistant magnetic head and its manufacture
JPS51114111A (en) Method of manufacturing magnetic heads
JPS5637820A (en) Manufacture of laminated core chip for magnetic head
JPS5218302A (en) Magnetic sheet recording/playing method
JPS56156928A (en) Magnetic recording tape
JPS57169208A (en) Manufacture of amorphous alloy with excellent constant permeability
JPS55167139A (en) Manufacture of oxide magnetic thin film
JPS5419200A (en) Magnetic recording medium process
JPS529900A (en) Manufacturing method of ferromagnetic metallic powder
JPS5223311A (en) Magnetic recording body
JPS56169229A (en) Manufacture of magnetic recording medium
JPS5220297A (en) Method of manufacture of uni-directional electromagnetic steel plate h aving excellent magnetic properties
JPS5635705A (en) Production of magnetic alloy powder
JPS56146821A (en) Method for improving magnetic characteristic of amorphous alloy
JPS5778604A (en) Recording readout method
JPS5285802A (en) Production of magnetic recording medium
JPS6442039A (en) Magneto-optical recording medium
JPS5240114A (en) Manufacturing method of magnetic heads
JPS5712401A (en) Recording system