DE69133223D1 - Magnetooptische Aufzeichnungs-/Wiedergabevorrichtung - Google Patents
Magnetooptische Aufzeichnungs-/WiedergabevorrichtungInfo
- Publication number
- DE69133223D1 DE69133223D1 DE69133223T DE69133223T DE69133223D1 DE 69133223 D1 DE69133223 D1 DE 69133223D1 DE 69133223 T DE69133223 T DE 69133223T DE 69133223 T DE69133223 T DE 69133223T DE 69133223 D1 DE69133223 D1 DE 69133223D1
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- optical recording
- reproducing device
- reproducing
- recording
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
- G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
- G11B13/045—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties combined recording by magnetic and optic means
-
- 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
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/1871—Shaping or contouring of the transducing or guiding surface
-
- 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
- G11B2005/0002—Special dispositions or recording techniques
-
- 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
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
-
- 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
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2158077A JPH0775042B2 (ja) | 1990-06-13 | 1990-06-13 | 光磁気記録再生装置 |
JP15807790 | 1990-06-13 | ||
JP15807290A JPH0778844B2 (ja) | 1990-06-13 | 1990-06-13 | 光磁気記録再生装置 |
JP15807290 | 1990-06-13 | ||
JP2162098A JP2559156B2 (ja) | 1990-06-20 | 1990-06-20 | 光磁気記録再生装置 |
JP16209890 | 1990-06-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69133223D1 true DE69133223D1 (de) | 2003-04-24 |
DE69133223T2 DE69133223T2 (de) | 2004-02-05 |
Family
ID=27321288
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69133223T Expired - Lifetime DE69133223T2 (de) | 1990-06-13 | 1991-06-13 | Magnetooptische Aufzeichnungs-/Wiedergabevorrichtung |
DE69129280T Expired - Lifetime DE69129280T2 (de) | 1990-06-13 | 1991-06-13 | Magnetooptisches Aufzeichnungs/Wiedergabegerät |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69129280T Expired - Lifetime DE69129280T2 (de) | 1990-06-13 | 1991-06-13 | Magnetooptisches Aufzeichnungs/Wiedergabegerät |
Country Status (4)
Country | Link |
---|---|
US (2) | US5202862A (de) |
EP (2) | EP0461907B1 (de) |
CA (1) | CA2043995C (de) |
DE (2) | DE69133223T2 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5392263A (en) * | 1990-01-31 | 1995-02-21 | Sony Corporation | Magneto-optical disk system with specified thickness for protective layer on the disk relative to the numerical aperture of the objective lens |
CA2043995C (en) * | 1990-06-13 | 1997-06-24 | Kenji Ohta | Magneto-optical recording/reproducing device |
DE69127902D1 (de) * | 1990-08-10 | 1997-11-13 | Minnesota Mining & Mfg | Direkt überschreibbares thermomagnetisches speichersystem mit hoher speicherdichte |
JP2636957B2 (ja) * | 1990-08-10 | 1997-08-06 | シャープ株式会社 | 磁気記録再生装置 |
US5910932A (en) * | 1991-09-11 | 1999-06-08 | Sony Corporation | Optical disk and optical disk system with numerical aperture of objective lens related to protective layer thickness of optical disk |
CA2080981C (en) * | 1991-10-21 | 1999-02-16 | Junji Hirokane | Magneto-optical recording method and magneto-optical memory device |
JPH05197903A (ja) * | 1991-10-28 | 1993-08-06 | Canon Inc | 光磁気記録装置 |
US5831944A (en) * | 1993-02-26 | 1998-11-03 | Canon Kabushiki Kaisha | Magnetooptical recording medium and method for reproducing information from a magnetooptical recording medium having three layers |
USRE38501E1 (en) | 1992-08-28 | 2004-04-20 | Canon Kabushiki Kaisha | Magnetooptical recording medium and information recording and reproducing methods using the recording medium |
JPH06302031A (ja) * | 1993-02-22 | 1994-10-28 | Sharp Corp | 光磁気記録媒体および光磁気記録装置 |
US5563564A (en) * | 1993-04-22 | 1996-10-08 | University Of Houston | Strong high-temperature superconductor trapped field magnets |
CA2137062A1 (en) * | 1993-12-08 | 1995-06-09 | Takumi Shimamori | Magneto-optical recording and reading-out method |
WO1995035572A1 (en) * | 1994-06-20 | 1995-12-28 | Neomagic Corporation | Graphics controller integrated circuit without memory interface |
KR970060108A (ko) * | 1996-01-18 | 1997-08-12 | 김광호 | 광자기 기록막 및 이를 적용한 광자기 디스크 |
JP3853512B2 (ja) * | 1997-04-21 | 2006-12-06 | 株式会社リコー | 磁気光学素子 |
JP3496113B2 (ja) * | 1997-07-02 | 2004-02-09 | 富士通株式会社 | 情報記録媒体、情報記録媒体の再生方法および情報記録媒体の再生装置 |
US6455174B1 (en) * | 1998-11-05 | 2002-09-24 | Hitachi Maxell, Ltd. | Magnetic recording medium, recording and reproducing head, and magnetic recording and reproducing method |
US6475611B1 (en) * | 1999-12-14 | 2002-11-05 | Seagate Technology Llc | Si-containing seedlayer design for multilayer media |
US7688685B1 (en) * | 2000-03-01 | 2010-03-30 | Hitachi, Ltd. | Magneto-optical recording device capable of changing the shapes of heating areas |
US6873576B1 (en) * | 2000-05-24 | 2005-03-29 | Koninklijke Philips Electronics N.V. | Method of thermally-assisted data recording and a recording apparatus |
US7554898B2 (en) * | 2002-02-26 | 2009-06-30 | Dphi Acquisitions, Inc. | Dual density disc with associated properties |
JP4087849B2 (ja) * | 2002-12-24 | 2008-05-21 | 富士通株式会社 | 光磁気記録媒体の製造方法 |
US20050166218A1 (en) * | 2002-12-24 | 2005-07-28 | Fujitsu Limited | Magneto-optical recording medium and method for producing the same |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5459915A (en) * | 1977-10-20 | 1979-05-15 | Sony Corp | Method and apparatus for reading of magnetic recording signal |
JPS5634A (en) * | 1979-06-11 | 1981-01-06 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS57105838A (en) * | 1980-12-24 | 1982-07-01 | Ricoh Co Ltd | Photo-thermal magnetic recording medium |
JPS5819753A (ja) * | 1981-07-30 | 1983-02-04 | Nec Corp | 垂直磁気記録体及びこれを用いた垂直磁化信号再生方法 |
JPS5841451A (ja) * | 1981-09-03 | 1983-03-10 | Nec Corp | 垂直磁気記録体 |
JPS5851451A (ja) * | 1981-09-19 | 1983-03-26 | Mitsubishi Electric Corp | 受像管 |
JPS5953855A (ja) * | 1982-09-21 | 1984-03-28 | Ricoh Co Ltd | 熱磁気記録体 |
WO1984002603A1 (en) * | 1982-12-23 | 1984-07-05 | Sony Corp | Thermomagnetic optical recording/reproducing method |
JPS6070543A (ja) * | 1983-09-28 | 1985-04-22 | Toshiba Corp | 情報記録担体 |
JPS60127548A (ja) * | 1983-12-14 | 1985-07-08 | Matsushita Electric Ind Co Ltd | 光記録再生装置 |
JPS6122451A (ja) * | 1984-07-09 | 1986-01-31 | Victor Co Of Japan Ltd | 光磁気記録媒体 |
JPS6171437A (ja) * | 1984-09-14 | 1986-04-12 | Fujitsu Ltd | 光磁気デイスク |
EP0180459B1 (de) * | 1984-10-30 | 1991-12-18 | Brother Kogyo Kabushiki Kaisha | Magnetooptisches Speichermedium und Gerät zum Schreiben auf und Lesen von dem Medium |
JPS61214258A (ja) * | 1985-03-20 | 1986-09-24 | Hitachi Ltd | 書込み再生一体化磁気ヘツド |
JPS61278060A (ja) * | 1985-05-31 | 1986-12-08 | Nec Home Electronics Ltd | 光熱磁気記録再生装置 |
JPS621148A (ja) * | 1985-06-26 | 1987-01-07 | Toshiba Corp | 光磁気効果による情報記録再生装置 |
JPS6243848A (ja) * | 1985-08-20 | 1987-02-25 | Seiko Epson Corp | 光磁気記録媒体 |
US4694358A (en) * | 1985-10-28 | 1987-09-15 | Kerdix, Inc. | Magneto-optic recording structure and method |
US5051970A (en) * | 1987-05-08 | 1991-09-24 | Nippon Telegraph And Telephone Corporation | Magneto-optic recording system with overwrite capability |
JPH01107344A (ja) * | 1987-10-21 | 1989-04-25 | Hitachi Ltd | 光磁気記録媒体及びその製造方法 |
JPH01171137A (ja) * | 1987-12-25 | 1989-07-06 | Hitachi Ltd | 光磁気記録媒体 |
JPH0242664A (ja) * | 1988-08-01 | 1990-02-13 | Matsushita Electric Ind Co Ltd | 光熱磁気記録媒体並びにその記録装置及びこれらを用いた光熱磁気記録方式 |
JP2653523B2 (ja) * | 1989-09-08 | 1997-09-17 | シャープ株式会社 | 光磁気メモリ素子の記録再生方法並びにその装置 |
JPH03214447A (ja) * | 1990-01-19 | 1991-09-19 | Canon Inc | 光磁気記録方法 |
CA2043995C (en) * | 1990-06-13 | 1997-06-24 | Kenji Ohta | Magneto-optical recording/reproducing device |
JP2790716B2 (ja) * | 1990-07-27 | 1998-08-27 | キヤノン株式会社 | 光磁気記録装置 |
JPH117344A (ja) * | 1997-06-18 | 1999-01-12 | Nec Shizuoka Ltd | 省電力パソコン |
JP3651200B2 (ja) * | 1997-08-22 | 2005-05-25 | Nok株式会社 | 貴金属微粒子担持光触媒薄膜の製造法 |
-
1991
- 1991-06-06 CA CA002043995A patent/CA2043995C/en not_active Expired - Lifetime
- 1991-06-11 US US07/713,742 patent/US5202862A/en not_active Expired - Lifetime
- 1991-06-13 EP EP91305374A patent/EP0461907B1/de not_active Expired - Lifetime
- 1991-06-13 EP EP97203052A patent/EP0827143B1/de not_active Expired - Lifetime
- 1991-06-13 DE DE69133223T patent/DE69133223T2/de not_active Expired - Lifetime
- 1991-06-13 DE DE69129280T patent/DE69129280T2/de not_active Expired - Lifetime
-
1993
- 1993-01-04 US US08/000,271 patent/US5325344A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0461907B1 (de) | 1998-04-22 |
EP0827143A2 (de) | 1998-03-04 |
EP0461907A2 (de) | 1991-12-18 |
EP0827143A3 (de) | 2000-01-19 |
US5202862A (en) | 1993-04-13 |
EP0461907A3 (de) | 1994-01-05 |
CA2043995C (en) | 1997-06-24 |
DE69129280T2 (de) | 1998-11-05 |
EP0827143B1 (de) | 2003-03-19 |
US5325344A (en) | 1994-06-28 |
DE69129280D1 (de) | 1998-05-28 |
DE69133223T2 (de) | 2004-02-05 |
CA2043995A1 (en) | 1991-12-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |