JPS6029996A - Photomagnetic recording carrier - Google Patents

Photomagnetic recording carrier

Info

Publication number
JPS6029996A
JPS6029996A JP13754183A JP13754183A JPS6029996A JP S6029996 A JPS6029996 A JP S6029996A JP 13754183 A JP13754183 A JP 13754183A JP 13754183 A JP13754183 A JP 13754183A JP S6029996 A JPS6029996 A JP S6029996A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
film
formed
process
thin
metallic
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
JP13754183A
Inventor
Yuzuru Hosoe
Katsuhiro Kaneko
Toshio Niihara
Ken Sugita
Shinji Takayama
Original Assignee
Hitachi 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

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing

Abstract

PURPOSE:To obtain an inexpensive recording carrier with a high S/N ratio and an increment of performance exponent by forming successively a thin film of a garnet compound containing Bi, a vertically magnetized metallic magnetic film and a metallic reflective film as well as a transparent nonmagnetic dielectric film when necessary on a transparent substrate. CONSTITUTION:A garnet thin film 2 containing Bi is formed on the upper surface of a transparent substrate 1 by a sputtering or vapor deposition process, etc. A magnetic thin film 3 whose magnetization facilitating axis is vertical to the film surface is formed on the film 2 by the same process. In addition, a metallic reflective film 4 and a nonmagnetic dielectric film 5 of SiO2 or SiO are formed on the film 3 by the same process. The film 3 uses an Mn or Co crystalline magnetic thin film. For the film 2, an amorphous film of about 0.4mum thickness is formed by a sputtering process with a sintered matter (100mm.phi) of a compound (Bi0.7Y2.3Fe5O12) used as a target. Then an amorphous film 3 of Fe58CO22Tb20 is formed with about 0.04mum thickness as the film 3 by a vacuum vapor deposition process. Then an Al film and SiO2 film are formed with about 0.1mum thickness on the film 3 as films 4 and 5 respectively.
JP13754183A 1983-07-29 1983-07-29 Photomagnetic recording carrier Pending JPS6029996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13754183A JPS6029996A (en) 1983-07-29 1983-07-29 Photomagnetic recording carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13754183A JPS6029996A (en) 1983-07-29 1983-07-29 Photomagnetic recording carrier

Publications (1)

Publication Number Publication Date
JPS6029996A true true JPS6029996A (en) 1985-02-15

Family

ID=15201094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13754183A Pending JPS6029996A (en) 1983-07-29 1983-07-29 Photomagnetic recording carrier

Country Status (1)

Country Link
JP (1) JPS6029996A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6316624U (en) * 1986-07-17 1988-02-03
US5932139A (en) * 1994-03-17 1999-08-03 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader thereof
US7726792B2 (en) 2004-12-09 2010-06-01 Canon Kabushiki Kaisha Ink tank for liquid printing apparatus, method of manufacturing same, liquid printing apparatus with same, and method of detecting remaining ink

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6316624U (en) * 1986-07-17 1988-02-03
US5932139A (en) * 1994-03-17 1999-08-03 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader thereof
US6303929B1 (en) 1994-03-17 2001-10-16 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader therefor
US6436314B1 (en) 1994-03-17 2002-08-20 Hitachi Maxell, Ltd. Particulate fluorescent substance
US6458294B2 (en) 1994-03-17 2002-10-01 Hitachi Maxell, Ltd. Fluorescent ink compositions
US6471887B2 (en) 1994-03-17 2002-10-29 Hitachi Maxell, Ltd. Neodymium, ytterbium and/or erbium containing organic fluorescent compositions
US6688789B2 (en) 1994-03-17 2004-02-10 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader therefor
US7726792B2 (en) 2004-12-09 2010-06-01 Canon Kabushiki Kaisha Ink tank for liquid printing apparatus, method of manufacturing same, liquid printing apparatus with same, and method of detecting remaining ink
US8240826B2 (en) 2004-12-09 2012-08-14 Canon Kabushiki Kaisha Ink tank for liquid printing apparatus, method of manufacturing same, liquid printing apparatus with same, and method of detecting remaining ink

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