JPS6442043A - Magneto-optical recording medium - Google Patents

Magneto-optical recording medium

Info

Publication number
JPS6442043A
JPS6442043A JP62198713A JP19871387A JPS6442043A JP S6442043 A JPS6442043 A JP S6442043A JP 62198713 A JP62198713 A JP 62198713A JP 19871387 A JP19871387 A JP 19871387A JP S6442043 A JPS6442043 A JP S6442043A
Authority
JP
Japan
Prior art keywords
substrate
copolymer
magneto
formula
protective layer
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.)
Granted
Application number
JP62198713A
Other languages
Japanese (ja)
Other versions
JP2633572B2 (en
Inventor
Kunihiko Mizumoto
Koichi Haruta
Hiroichi Kajiura
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.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries 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 Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP62198713A priority Critical patent/JP2633572B2/en
Priority to PCT/JP1988/000785 priority patent/WO1989001687A1/en
Priority to EP88906911A priority patent/EP0331737B1/en
Priority to DE3855347T priority patent/DE3855347T2/en
Priority to AT88906911T priority patent/ATE139052T1/en
Publication of JPS6442043A publication Critical patent/JPS6442043A/en
Application granted granted Critical
Publication of JP2633572B2 publication Critical patent/JP2633572B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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Abstract

PURPOSE:To stabilize remarkable magnetic recording characteristic preferably over a long period of time by selecting a specific copolymer as plastic to constitute a substrate, selecting a specific compd. for a protective layer as well and combining both. CONSTITUTION:The transparent plastic constituting the substrate is the copolymer consisting of at least ethylene and the cyclic olefin expressed by formula I as constituting monomers. The monomer unit of formula I in the copolymer is the substantially amorphous copolymer which has the structure expressed by formula II. The protective layer consists of the compd. selected from Si3N4, AlN, etc. In formulas I, II, R<1>-R<12> are hydrogen, alkyl group, etc.; (n) is 0 or >=1 positive integer. The maintenance of the long-period magneto-optical characteristics of the magneto-optical recording medium formed by using the plastic substrate is thereby improved; in addition, the adhesion of the substrate and the protective layer is improved.
JP62198713A 1987-08-08 1987-08-08 Magneto-optical recording medium Expired - Lifetime JP2633572B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62198713A JP2633572B2 (en) 1987-08-08 1987-08-08 Magneto-optical recording medium
PCT/JP1988/000785 WO1989001687A1 (en) 1987-08-08 1988-08-08 Photomagnetic recording medium
EP88906911A EP0331737B1 (en) 1987-08-08 1988-08-08 Photomagnetic recording medium
DE3855347T DE3855347T2 (en) 1987-08-08 1988-08-08 PHOTOMAGNETIC STORAGE MEDIUM
AT88906911T ATE139052T1 (en) 1987-08-08 1988-08-08 PHOTOMAGNETIC STORAGE MEDIUM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62198713A JP2633572B2 (en) 1987-08-08 1987-08-08 Magneto-optical recording medium

Publications (2)

Publication Number Publication Date
JPS6442043A true JPS6442043A (en) 1989-02-14
JP2633572B2 JP2633572B2 (en) 1997-07-23

Family

ID=16395773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62198713A Expired - Lifetime JP2633572B2 (en) 1987-08-08 1987-08-08 Magneto-optical recording medium

Country Status (1)

Country Link
JP (1) JP2633572B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5607780A (en) * 1993-07-30 1997-03-04 Hitachi Metals, Ltd. Target for magneto-optical recording medium and process for production thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61292601A (en) * 1985-06-21 1986-12-23 Mitsui Petrochem Ind Ltd Optical material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61292601A (en) * 1985-06-21 1986-12-23 Mitsui Petrochem Ind Ltd Optical material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5607780A (en) * 1993-07-30 1997-03-04 Hitachi Metals, Ltd. Target for magneto-optical recording medium and process for production thereof

Also Published As

Publication number Publication date
JP2633572B2 (en) 1997-07-23

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