RU1835086C - Носитель дл записи информации - Google Patents
Носитель дл записи информацииInfo
- Publication number
- RU1835086C RU1835086C SU904743833A SU4743833A RU1835086C RU 1835086 C RU1835086 C RU 1835086C SU 904743833 A SU904743833 A SU 904743833A SU 4743833 A SU4743833 A SU 4743833A RU 1835086 C RU1835086 C RU 1835086C
- Authority
- RU
- Russia
- Prior art keywords
- aluminum alloy
- magnesium
- hafnium
- layer
- carrier according
- Prior art date
Links
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 19
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 12
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims abstract description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 229910052749 magnesium Inorganic materials 0.000 claims description 12
- 239000011777 magnesium Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 239000010955 niobium Substances 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 20
- 150000001925 cycloalkenes Chemical class 0.000 description 4
- 229910052723 transition metal Inorganic materials 0.000 description 4
- 150000003624 transition metals Chemical class 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910005745 Ge—Cr Inorganic materials 0.000 description 1
- 229910005936 Ge—Sb Inorganic materials 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910001215 Te alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- -1 for example Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- G11B5/62—Record carriers characterised by the selection of the material
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- 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
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- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B7/2433—Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
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- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
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- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
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- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
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- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B7/2578—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
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- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
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- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
- G11B7/2585—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on aluminium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/928—Magnetic property
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
- Y10T428/12743—Next to refractory [Group IVB, VB, or VIB] metal-base component
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Holo Graphy (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Изобретение относитс к среде дл . записи информации, имеющей металлический слой, конкретно, к среде дл записи информации , обладающей хорошей коррозийной устойчивостью или стабильностью и небольшой зависимостью силы записи от линейной скорости. Цель изобретени заключаетс в повышении надежности при создании среды дл записи информации за счет увеличени коррозионной устойчивости и снижени изменений мощности записи от линейной скорости носител , Сущность изобретени : носитель дл записи информации содержит подложку и после- довательно сформированные на ней записывающий слой и металлический слой на основе алюмини , представл ющий сплав алюмини , содержащий, по меньшей мере, один элемент, выбранный из группы гафни и ниоби в количестве 0,1-10 эт.% о 1 пересчете на все атомы, образующие слой сплава алюмини . Сплав алюмини может содержать 0,1-10 ат.% магни в пересчете на все атомы, образующие слой сплава алюмини , при этом суммарное содержание гафни и магни составл ет 1-10 ат.%, з также 0,1-10 ат.% титана при суммарном содержании гафни , магни и титана 1-10 ат.%. Кроме того, сплав алюмини может дополнительно к гафнию и магнию содержать 0,1-1.0 ат.% хрома в пересчете на все атомы, образующие слой сплава алюмини , при этом суммарное содержание гафни , магни и хрома составл ет 1-10 ат.%. СО СЛ О 00 CS
Description
Изобретение относитс к среде дл записи информации, имеющей металлический слой, конкретно, к среде дл записи информации , обладающей хорошей коррозионной устойчивостью или стабильностью и небольшой зависимостью силы записи от линейной скорости.
Цель изобретени заключаетс в повышении надежности при создании среды дл записи информации за счет увеличени коррозионной устойчивости и снижени изменений мощности записи от линейной скорости носител .
Носитель дл записи информации содержит подложку и последовательно сформированные на ней записывающий слой и металлический слой на основе алюмини , представл ющий сплав алюмини , содержащий по меньшей мере, один элемент, выбранный из группы гафни и ниоби в
Ы
количестве 0.1-Ю ат.% в пересчете на все атомы, образующие слой сплава алюмини .
Сплав алюмини может содержать 0,1- 10 ат.% магни в пересчете на псе атомы, образующие слой сплава алюмини , при этом суммарное содержание гафни и магни составл ет 1-10 ат.%. а также 0,1-10 ат.% титана при суммарном содержании гафни , магни и титана 1-10 ат.%.
Кроме того, сплав алюмини может дополнительно к гафнию и магнию содержать 0,1-10 ат.% хрома в пересчете на все атомы, образующие слой сплава алюмини , при этом суммарное содержание гафни , маг- ни и хрома составл ет 1-10 ат.%.
Помимо этого, сплав алюмини , кроме гафни , магни , титана может содержать V- 5 ат.% хрома пересчете на все атомы, образующие слой сплава алюмини , при этом суммарное содержание гафни , магни , титана и хрома составл ет 1-10 ат.%,
Записывающий слой может вл тьс магнитооптическим, а отражающий металлический слой может иметь толщину 1005000 А.
Между подложкой и записывающим слоем может быть нанесена защитна пленка .
Хран ща с в среде дл записи информаци считываетс с помощью света, например , лазерного луча. Среды дл записи информации этого типа конкретно включают: оптические диски посткриптумного типа , способные к дополнительной записи, но не способные к стиранию записанного, оптические диски перезаписывающего типа, такие как магнитооптические диски дл записи и фазопеременные диски, способные к записи информации, также как и стиранию и воспроизведению записанной информации .
Материалы подложки не ограничены каким-то конкретными примерами. Однако, если лазерный луч падает на подложку, рекомендуетс , чтобы материал был прозрачным . Помимо неорганических материалов, таких как: стекло, алюминий и т.п., такие прозрачные материалы включают, например , органические материалы такие как: по- ли(металметакрилат), поликарбонат, полимерные сплавы поликарбоната с полистиролом , неупор доченные сополимеры циклоолефинов, типа, например, неупор доченные сополимеры циклоолефинов, по- ли-4-метил-1-пентен, эпоксидные смолы, полиэфирсульфоны, полисульфоны, имиды полиэфиров и т.п. Из указанных органических материалов рекомендуютс : полиметилме- такрилат, поликарбонат, неупор доченные
сополимеры циклоолефинов и неупор доченные сополимеры циклоолефинов.
Материал записывающего сло не ограничен особыми примерами, однако если
примен етс магнитооптический слой с моноаксиальной анизотропией, перпендикул рной поверхности сло , такой слой предпочтительно состоит из по меньшей мере , из одного члена, выбранного из 3d переходного металла и по меньшей мере одного элемента, выбранного из редкоземельного элемента, или состоит по меньшей мере из одного члена, выбранного из 3d переходного металла, коррозионноустойчивого метал5 ла и по меньшей мере оного элемента из редкоземельных.
Примен емые 3d переходные металлы включают Fe, Co. TI. V, Cr, Mn, NI, Си и Zn, из которых рекомендуютс Fe или Со или
0 они оба.
Магнитооптические слои желательно содержат 3d переходный металл в количестве 30-85 ат.% (предпочтительно 40-70 ат.%). коррозионноустойчивый металл в ко5 личестве менее 30 ат.% (предпочтительно 5-25 ат.%) и редкоземельный элемент в количестве 5-50 ат.% (предпочтительно 25-45 ат.%).
Если записывающий слой относитс к
0 физопеременному типу, то он состоит из Те или Se и пленки сплава Te-Ge-Sb, пленки сплава In-Sb-Te, пленки сплава Te-Ge-Cr или пленки сплава Te-Ge-Zn.
Толщина записывающего сло может
5о
составл ть 50-5000 А., предпочтительно
100-2000 А.
Используемые металлические слои,
0 описанные выше, имеют хорошую теплопроводность и в присутствии таких слоев центральные части макроуглублени (питов) предохран ют от чрезмерного перегрева, в результате чего зависимость мощности ла5 зерного пучка от линейной скорости становитс небольшой.
Защитна пленка повышает чувствительность среды и действует в качестве усиливающей пленки. Такой защитный слой
Q желательно имеет более высокий, чем у подложки , показатель преломлени .
В одном из примеров при толщине мео
таллического сло 500 А. Оптимальна величина мощности записи составл ет 3,7 мВт и 5,2 мВт при линейной скорости соответственно 5,7 м/с и 11,3 м/с.
Claims (7)
- Формула изобретени 1. Носитель дл записи информации, содержащий подложку и последовательносформированные на ней записывающей слой и отражающий металлический слой на основе алюмини , отличающийс тем. что, с целью повышени надежности за счет увеличени коррозионной устойчивости носител и снижени изменений мощности записи от линейной скорости носител , металлический слой выполнен на основе сплава алюмини , содержащего 0,1-10 ат.% по меньшей мере одного элемента из группы гафни и ниоби в пересчете на все атомы сплава алюмини .
- 2.Носитель по п.1, о т л и ч а ю щ и и - с тем. что сплав алюмини дополнительно содержитО,1-10ат.% магни в пересчете на все атомы сплава алюмини , при этом суммарное содержание гафни и магни составл ет 1-10 ат.%.
- 3.Носитель по п.2. отличаю щий- с тем. что сплао алюмини дополнительно содержит 0,1-10 ат.% титана в пересчете на все атомы сплава алюмини , при этом суммарное содержание гафни , магни и титана составл ет 1-10 ат.%.050
- 4.Носитель по п.2, отличающий- с тем. что сплав алюмини дополнительно содержит 0,1-10 ат.% хрома в пересчете на все атомы сплава алюмини , при этом суммарное содержание гафни , магни и хрома составл ет 1-10 ат.%.
- 5.Носитель по п.З, отличающий- с тем. что сплав алюмини дополнительно содержит 1-5 ат.% хрома в пересчете на все атомн сплава алюмини , при этом суммарное содержание гафнип, магни , титана и хрома составл ет 1-10 эт.%.
- 6.Носитель по пп.1-5, о т л и ч а ю щ и- й с тем, что записывающий слой вл етс магнитооптическим.
- 7.Носитель по пп.1-5, о т л и ч а ю щ lift с тем. что отражающий металлическийо слой имеет толщину от 100 до 5000 А,Приоритет по пунктам. 17.04,89 по пп. 1,6 и 7; 20.06,89 по пп. 2 и 5.25
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP9720689 | 1989-04-17 | ||
JP12955389 | 1989-05-23 | ||
JP12955489 | 1989-05-23 | ||
JP15753289 | 1989-06-20 |
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Publication Number | Publication Date |
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RU1835086C true RU1835086C (ru) | 1993-08-15 |
Family
ID=27468521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU904743833A RU1835086C (ru) | 1989-04-17 | 1990-04-16 | Носитель дл записи информации |
Country Status (8)
Country | Link |
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US (1) | US5032470A (ru) |
EP (1) | EP0393576B1 (ru) |
KR (1) | KR900016955A (ru) |
AT (1) | ATE141436T1 (ru) |
CS (1) | CS190990A2 (ru) |
DE (1) | DE69028032T2 (ru) |
PL (1) | PL284812A1 (ru) |
RU (1) | RU1835086C (ru) |
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MY106951A (en) * | 1987-12-08 | 1995-08-30 | Mitsui Chemicals Inc | Active energy ray-curable composition and optical recording medium having cured product of the composition |
CA2017226A1 (en) * | 1989-05-23 | 1990-11-23 | Kiyotaka Shindo | Information recording media |
US5500301A (en) * | 1991-03-07 | 1996-03-19 | Kabushiki Kaisha Kobe Seiko Sho | A1 alloy films and melting A1 alloy sputtering targets for depositing A1 alloy films |
DE69225771T2 (de) * | 1991-11-07 | 1998-10-01 | Toray Industries | Optisches Aufzeichnungsmedium |
US5948497A (en) * | 1992-10-19 | 1999-09-07 | Eastman Kodak Company | High stability silver based alloy reflectors for use in a writable compact disk |
US5972461A (en) | 1998-01-06 | 1999-10-26 | Imation Corp. | Rewritable optical data storage disk having enhanced flatness |
US6238763B1 (en) | 1998-01-06 | 2001-05-29 | Imation Corp. | Rewritable optical data storage disk having enhanced flatness |
JP4193185B2 (ja) * | 2006-07-12 | 2008-12-10 | 独立行政法人産業技術総合研究所 | 無色透明にできる反射型調光薄膜材料 |
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JPS5720933A (en) * | 1980-07-14 | 1982-02-03 | Toshiba Corp | Information recording carrier |
NL8102283A (nl) * | 1981-05-11 | 1982-12-01 | Philips Nv | Optisch uitleesbare informatieschijf met een reflectielaag gevormd uit een metaallegering. |
DE3425578A1 (de) * | 1984-07-11 | 1986-01-16 | Polygram Gmbh, 2000 Hamburg | Optisch auslesbarer plattenfoermiger informationstraeger hoher speicherdichte |
JPS61156550A (ja) * | 1984-12-27 | 1986-07-16 | Matsushita Electric Ind Co Ltd | 光熱磁気記録担体 |
JPS6267750A (ja) * | 1985-09-19 | 1987-03-27 | Sumitomo Metal Mining Co Ltd | 光磁気デイスク |
JPH0719396B2 (ja) * | 1985-12-09 | 1995-03-06 | ソニー株式会社 | 情報記録媒体 |
JPS62172545A (ja) * | 1986-01-23 | 1987-07-29 | Hitachi Maxell Ltd | 光磁気記録媒体 |
JPS62177721A (ja) * | 1986-01-31 | 1987-08-04 | Nec Corp | 磁気記録体 |
US4740430A (en) * | 1987-02-18 | 1988-04-26 | American Telephone And Telegraph Company, At&T Bell Laboratories | Magneto-optic memory |
-
1990
- 1990-04-13 US US07/508,698 patent/US5032470A/en not_active Expired - Fee Related
- 1990-04-16 RU SU904743833A patent/RU1835086C/ru active
- 1990-04-17 KR KR1019900005334A patent/KR900016955A/ko not_active IP Right Cessation
- 1990-04-17 PL PL28481290A patent/PL284812A1/xx unknown
- 1990-04-17 DE DE69028032T patent/DE69028032T2/de not_active Expired - Fee Related
- 1990-04-17 CS CS901909A patent/CS190990A2/cs unknown
- 1990-04-17 AT AT90107247T patent/ATE141436T1/de not_active IP Right Cessation
- 1990-04-17 EP EP90107247A patent/EP0393576B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
За вка EP № 0353392, кл. G 11 В 7/00, опубл. 07.02.90. За вка EP №03.1341.0. кл. G 11 В 7/00, опубл. 1988. * |
Also Published As
Publication number | Publication date |
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EP0393576A3 (en) | 1991-12-18 |
PL284812A1 (en) | 1991-02-25 |
CS190990A2 (en) | 1991-09-15 |
DE69028032T2 (de) | 1997-01-23 |
KR900016955A (ko) | 1990-11-14 |
ATE141436T1 (de) | 1996-08-15 |
US5032470A (en) | 1991-07-16 |
EP0393576B1 (en) | 1996-08-14 |
EP0393576A2 (en) | 1990-10-24 |
DE69028032D1 (de) | 1996-09-19 |
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