CA2014158C - Magneto-optic memory medium - Google Patents

Magneto-optic memory medium

Info

Publication number: CA2014158C
Authority: CA; Canada
Prior art keywords: film; magneto; reading; recording; memory medium
Prior art date: 1989-04-07
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.): Expired - Lifetime

Application number

CA002014158A

Other languages

English (en)

French (fr)

Inventor

Kenji Ohta

Akira Takahashi

Hiroyuki Katayama

Tomokazu Ise

Tomoyuki Miyake

Junichiro Nakayama

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.)

Sharp Corp

Original Assignee

Sharp Corp

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.)

1989-04-07

Filing date

1990-04-09

Publication date

1995-04-04

1989-04-07 Priority to JP1089318A priority Critical patent/JP2685888B2/ja

1989-07-21 Priority to JP1189318A priority patent/JPH06105955B2/ja

1990-04-06 Priority to EP90303736A priority patent/EP0391738B1/en

1990-04-06 Priority to DE69015407T priority patent/DE69015407T2/de

1990-04-06 Priority to US07/505,476 priority patent/US5095350A/en

1990-04-09 Application filed by Sharp Corp filed Critical Sharp Corp

1990-04-09 Priority to CA002014158A priority patent/CA2014158C/en

1995-04-04 Application granted granted Critical

1995-04-04 Publication of CA2014158C publication Critical patent/CA2014158C/en

2010-04-09 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

229910045601 alloy Inorganic materials 0.000 claims abstract description 10
239000000956 alloy Substances 0.000 claims abstract description 10
230000000694 effects Effects 0.000 claims description 13
239000000758 substrate Substances 0.000 claims description 10
229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 5
229910052723 transition metal Inorganic materials 0.000 claims description 5
238000003475 lamination Methods 0.000 claims description 2
230000005293 ferrimagnetic effect Effects 0.000 abstract description 7
239000010408 film Substances 0.000 description 119
150000004767 nitrides Chemical class 0.000 description 10
230000007423 decrease Effects 0.000 description 7
238000010276 construction Methods 0.000 description 5
239000000463 material Substances 0.000 description 5
230000035945 sensitivity Effects 0.000 description 5
230000005291 magnetic effect Effects 0.000 description 4
230000005415 magnetization Effects 0.000 description 4
229910052761 rare earth metal Inorganic materials 0.000 description 4
230000005381 magnetic domain Effects 0.000 description 3
239000000203 mixture Substances 0.000 description 3
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
239000011521 glass Substances 0.000 description 2
230000003287 optical effect Effects 0.000 description 2
238000004544 sputter deposition Methods 0.000 description 2
229910017083 AlN Inorganic materials 0.000 description 1
229910003564 SiAlON Inorganic materials 0.000 description 1
229910004541 SiN Inorganic materials 0.000 description 1
229910052782 aluminium Inorganic materials 0.000 description 1
229910052797 bismuth Inorganic materials 0.000 description 1
229910052804 chromium Inorganic materials 0.000 description 1
229910052681 coesite Inorganic materials 0.000 description 1
239000002131 composite material Substances 0.000 description 1
229910052906 cristobalite Inorganic materials 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
238000000151 deposition Methods 0.000 description 1
230000008021 deposition Effects 0.000 description 1
230000002708 enhancing effect Effects 0.000 description 1
230000001747 exhibiting effect Effects 0.000 description 1
229910052751 metal Inorganic materials 0.000 description 1
239000002184 metal Substances 0.000 description 1
238000000034 method Methods 0.000 description 1
239000004417 polycarbonate Substances 0.000 description 1
229920000515 polycarbonate Polymers 0.000 description 1
230000001681 protective effect Effects 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
239000004065 semiconductor Substances 0.000 description 1
239000000377 silicon dioxide Substances 0.000 description 1
235000012239 silicon dioxide Nutrition 0.000 description 1
229910052950 sphalerite Inorganic materials 0.000 description 1
229910052682 stishovite Inorganic materials 0.000 description 1
239000010409 thin film Substances 0.000 description 1
229910052718 tin Inorganic materials 0.000 description 1
229910052905 tridymite Inorganic materials 0.000 description 1
238000007740 vapor deposition Methods 0.000 description 1
NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
229910052984 zinc sulfide Inorganic materials 0.000 description 1

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording 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
- G11B11/10—Recording 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
- G11B11/105—Recording 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 thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material

CA002014158A 1989-04-07 1990-04-09 Magneto-optic memory medium Expired - Lifetime CA2014158C (en)

Priority Applications (6)

Application Number	Priority Date	Filing Date	Title
JP1089318A JP2685888B2 (ja)	1989-04-07	1989-04-07	磁気光学記録媒体
JP1189318A JPH06105955B2 (ja)	1989-07-21	1989-07-21	印刷用画像データ圧縮・復元システム
EP90303736A EP0391738B1 (en)	1989-04-07	1990-04-06	Magneto-optic memory medium
DE69015407T DE69015407T2 (de)	1989-04-07	1990-04-06	Magnetooptischer Aufzeichnungsträger.
US07/505,476 US5095350A (en)	1989-04-07	1990-04-06	Magneto-optic memory medium
CA002014158A CA2014158C (en)	1989-04-07	1990-04-09	Magneto-optic memory medium

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
JP89318/1989		1989-04-07
JP1189318A JPH06105955B2 (ja)	1989-07-21	1989-07-21	印刷用画像データ圧縮・復元システム
CA002014158A CA2014158C (en)	1989-04-07	1990-04-09	Magneto-optic memory medium

Publications (1)

Publication Number	Publication Date
CA2014158C true CA2014158C (en)	1995-04-04

Family

ID=25674059

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002014158A Expired - Lifetime CA2014158C (en)	1989-04-07	1990-04-09	Magneto-optic memory medium

Country Status (2)

Country	Link
JP (1)	JPH06105955B2 (ja)
CA (1)	CA2014158C (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5583656A (en) *	1992-12-31	1996-12-10	Eastman Kodak Company	Methods and apparatus for attaching compressed look-up table (LUT) representations of N to M-dimensional transforms to image data and for processing image data utilizing the attached compressed LUTs
JP4192640B2 (ja) *	2003-03-19	2008-12-10	セイコーエプソン株式会社	ブロック内のエッジを検出しながら処理を行う画像処理装置、および画像処理方法

1989
- 1989-07-21 JP JP1189318A patent/JPH06105955B2/ja not_active Expired - Fee Related
1990
- 1990-04-09 CA CA002014158A patent/CA2014158C/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
JPH06105955B2 (ja)	1994-12-21
JPH0353767A (ja)	1991-03-07

Legal Events

Date	Code	Title	Description
1990-04-09	EEER	Examination request
2010-04-09	MKEX	Expiry

Publication	Publication Date	Title
EP0619577B1 (en)	1999-03-03	Magneto-optical recording medium and method for reproducing information therein
US5204193A (en)	1993-04-20	Recording magnetooptical recording medium
EP0810594B1 (en)	2004-08-04	Magneto-optical recording medium
US4753853A (en)	1988-06-28	Double-layered magnetooptical recording medium
JP2986622B2 (ja)	1999-12-06	光磁気メモリー素子およびその記録再生方法
US4871614A (en)	1989-10-03	Opto-magnetic recording medium having three exchange-coupled magnetic layers
US5862105A (en)	1999-01-19	Information recording method capable of verifying recorded information simultaneously with recording, and magneto-optical recording medium used in the method
EP0479474B1 (en)	1995-12-13	Magneto-optical recording medium
US5486395A (en)	1996-01-23	Magneto-optical disk
US5719829A (en)	1998-02-17	Magnetooptical recording medium allowing super-resolution, and information reproduction method using the medium
US5663935A (en)	1997-09-02	Magneto-optical recording medium having two magnetic layers of exchange-coupled at ferromagnetic phase
US5666346A (en)	1997-09-09	Super-resolution magnetooptical recording medium using magnetic phase transition material, and method for reproducing information from the medium
CA1226672A (en)	1987-09-08	Magneto-optical memory element
US5965286A (en)	1999-10-12	Magneto-optical recording medium
US5095350A (en)	1992-03-10	Magneto-optic memory medium
CA2014158C (en)	1995-04-04	Magneto-optic memory medium
EP0330394B1 (en)	1996-07-17	Two-layered type opto-magnetic recording medium having low-coercive force layer containing Gd and at least one of Tb and Dy
US4777082A (en)	1988-10-11	Optical magnetic recording medium
EP0668585B1 (en)	2000-12-27	Information recording method and system using a magneto-optical medium
US5240784A (en)	1993-08-31	Magnetooptical recording medium
JPS61246946A (ja)	1986-11-04	光磁気記録媒体
JPS59201247A (ja)	1984-11-14	光磁気記録媒体
US4999260A (en)	1991-03-12	Magneto-optical recording medium comprising a rare-earth-transition metal dispersed in a dielectric
KR930002168B1 (ko)	1993-03-27	자기광 메모리 매체
JPH0528555A (ja)	1993-02-05	光磁気記録媒体