SG82519A1 - Information recording medium and method of fabricating the same - Google Patents

Information recording medium and method of fabricating the same

Info

Publication number
SG82519A1
SG82519A1 SG9502012A SG1995002012A SG82519A1 SG 82519 A1 SG82519 A1 SG 82519A1 SG 9502012 A SG9502012 A SG 9502012A SG 1995002012 A SG1995002012 A SG 1995002012A SG 82519 A1 SG82519 A1 SG 82519A1
Authority
SG
Singapore
Prior art keywords
fabricating
same
recording medium
information recording
information
Prior art date
Application number
SG9502012A
Other languages
English (en)
Inventor
Mitsuaki Oshima
Komoda Hideaki
Ushigome Hisashi
Original Assignee
Matsushita Electric Ind Co 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of SG82519A1 publication Critical patent/SG82519A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • G11B20/00594—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits
    • G—PHYSICS
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    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • G—PHYSICS
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    • G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
    • G—PHYSICS
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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Credit Cards Or The Like (AREA)
  • Magnetic Record Carriers (AREA)
SG9502012A 1993-01-21 1994-01-19 Information recording medium and method of fabricating the same SG82519A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP859693 1993-01-21
JP9221993 1993-03-25
JP10742393 1993-04-09
JP20568293 1993-07-27
JP29750493 1993-11-02
JP31411493 1993-11-19

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SG82519A1 true SG82519A1 (en) 2001-08-21

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SG1998000736A SG71103A1 (en) 1993-01-21 1994-01-19 Information recording medium and method of fabricating the same
SG9502012A SG82519A1 (en) 1993-01-21 1994-01-19 Information recording medium and method of fabricating the same
SG1998000735A SG71102A1 (en) 1993-01-21 1994-01-19 Information recording medium and method of fabricating the same
SG1995002048A SG54982A1 (en) 1993-01-21 1994-01-19 Recording and reproducing apparatus

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SG1998000736A SG71103A1 (en) 1993-01-21 1994-01-19 Information recording medium and method of fabricating the same

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SG1998000735A SG71102A1 (en) 1993-01-21 1994-01-19 Information recording medium and method of fabricating the same
SG1995002048A SG54982A1 (en) 1993-01-21 1994-01-19 Recording and reproducing apparatus

Country Status (5)

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EP (5) EP0609013A3 (zh)
KR (2) KR100195398B1 (zh)
CN (4) CN1941125A (zh)
CA (3) CA2113842A1 (zh)
SG (4) SG71103A1 (zh)

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Publication number Priority date Publication date Assignee Title
US6075920A (en) * 1994-02-28 2000-06-13 Sony Corporation Method and apparatus for recording/ reproducing data and subcode information onto/from a recording medium
US6081785A (en) * 1995-10-09 2000-06-27 Matsushita Electric Industrial Co., Ltd. Optical disk, optical recorder, optical reproducer, crytocommunication system and program license system
US7191154B2 (en) 1995-10-09 2007-03-13 Matsushita Electric Industrial Co., Ltd. Apparatus for encrypting and recording received content information on a recording medium using both medium identification information and a cipher key for encryption
US5886979A (en) * 1996-10-21 1999-03-23 Fujitsu Limitd Information recording medium and method for recording and reproducing information to a medium to prevent unauthorized copying
US6747930B1 (en) 1996-12-24 2004-06-08 Hide & Seek Technologies, Inc. Data protection on an optical disk
JP3607486B2 (ja) * 1998-01-21 2005-01-05 株式会社東芝 情報記録再生装置
DE19815990A1 (de) * 1998-04-09 1999-10-14 Thomson Brandt Gmbh Gerät zur Aufzeichnung oder zur Wiedergabe von Informationen mit einem Antriebssystem für eine Abtasteinrichtung
FR2784830A1 (fr) * 1998-10-19 2000-04-21 Thomson Multimedia Sa Methode de copie evitant la duplication non-autorisee de donnees numeriques et dispositif de lecture pour la mise en oeuvre de la methode
US6563793B1 (en) 1998-11-25 2003-05-13 Enron Warpspeed Services, Inc. Method and apparatus for providing guaranteed quality/class of service within and across networks using existing reservation protocols and frame formats
JP3566121B2 (ja) * 1999-02-19 2004-09-15 株式会社ソニー・コンピュータエンタテインメント 光ディスク、光ディスクの製造方法及び該光ディスクを用いたエンターテインメント・システム
US7763345B2 (en) 1999-12-14 2010-07-27 Mannington Mills, Inc. Thermoplastic planks and methods for making the same
JP4277452B2 (ja) * 2000-02-25 2009-06-10 ソニー株式会社 記録装置、再生装置
JP4348851B2 (ja) 2000-09-21 2009-10-21 ソニー株式会社 記録媒体、ディスク記録装置および方法、並びにディスク再生装置及び方法
KR100719129B1 (ko) * 2001-02-06 2007-05-17 삼성전자주식회사 디스크 플레이어
CN100416683C (zh) * 2005-04-14 2008-09-03 日立麦克赛尔株式会社 光信息记录介质及母盘
US20060250912A1 (en) * 2005-05-09 2006-11-09 Pratt Thomas L System and method for multi-laser optical medium
JP4784371B2 (ja) * 2006-04-06 2011-10-05 ソニー株式会社 記録装置、記録方法および記録プログラム
SI3101141T1 (sl) 2007-06-08 2020-03-31 Epigenomics Ag Postopek za metilacijsko analizo
CN102186809A (zh) 2008-08-14 2011-09-14 拜尔农作物科学股份公司 杀虫性的4-苯基-1h-吡唑
EP2204094A1 (en) 2008-12-29 2010-07-07 Bayer CropScience AG Method for improved utilization of the production potential of transgenic plants Introduction
EP2227951A1 (de) 2009-01-23 2010-09-15 Bayer CropScience AG Verwendung von Enaminocarbonylverbindungen zur Bekämpfung von durch Insekten übertragenen Viren
CN102317259B (zh) 2009-02-17 2015-12-02 拜尔农科股份公司 杀真菌n-(苯基环烷基)羧酰胺，n-(苄基环烷基)羧酰胺和硫代羧酰胺衍生物
TW201031331A (en) 2009-02-19 2010-09-01 Bayer Cropscience Ag Pesticide composition comprising a tetrazolyloxime derivative and a fungicide or an insecticide active substance
EP2343280A1 (en) 2009-12-10 2011-07-13 Bayer CropScience AG Fungicide quinoline derivatives
WO2011080256A1 (en) 2009-12-28 2011-07-07 Bayer Cropscience Ag Fungicide hydroximoyl-tetrazole derivatives
KR20120102142A (ko) 2009-12-28 2012-09-17 바이엘 크롭사이언스 아게 살진균제 히드록시모일-헤테로사이클 유도체
BR112012012340A2 (pt) 2009-12-28 2015-09-08 Bayer Cropscience Ag composto, composição fungicida e método para o controle de fungo fitopatogênico de culturas
CN102933078A (zh) 2010-04-06 2013-02-13 拜耳知识产权有限责任公司 4-苯基丁酸和/或其盐用于提高植物应激耐受性的用途
EP2555626A2 (de) 2010-04-09 2013-02-13 Bayer Intellectual Property GmbH Verwendung von derivaten der (1-cyancyclopropyl)phenylphosphinsäure, deren ester und/oder deren salze zur steigerung der toleranz in pflanzen gegenüber abiotischem stress
US20130116287A1 (en) 2010-04-28 2013-05-09 Christian Beier Fungicide hydroximoyl-heterocycles derivatives
CN102971309A (zh) 2010-04-28 2013-03-13 拜尔农科股份公司 杀真菌剂肟基-杂环衍生物
WO2011134911A2 (en) 2010-04-28 2011-11-03 Bayer Cropscience Ag Fungicide hydroximoyl-tetrazole derivatives
UA110703C2 (uk) 2010-06-03 2016-02-10 Байєр Кропсайнс Аг Фунгіцидні похідні n-[(тризаміщений силіл)метил]-карбоксаміду
WO2011151370A1 (en) 2010-06-03 2011-12-08 Bayer Cropscience Ag N-[(het)arylalkyl)] pyrazole (thio)carboxamides and their heterosubstituted analogues
AU2011264074B2 (en) 2010-06-09 2015-01-22 Bayer Cropscience Nv Methods and means to modify a plant genome at a nucleotide sequence commonly used in plant genome engineering
BR112012031323A2 (pt) 2010-06-09 2015-09-08 Bayer Cropscience Nv métodos e meios para modificação de genoma vegetal em uma sequência de nucleotídeos comumente usada na engenahria genética de plantas
BR112013001430B1 (pt) 2010-07-20 2018-02-06 Bayer Cropscience Ag Compostos, composição fungicida e método para controle de fungos fitopatogênicos de culturas
EP2460406A1 (en) 2010-12-01 2012-06-06 Bayer CropScience AG Use of fluopyram for controlling nematodes in nematode resistant crops
EP2460407A1 (de) 2010-12-01 2012-06-06 Bayer CropScience AG Wirkstoffkombinationen umfassend Pyridylethylbenzamide und weitere Wirkstoffe
CN102135553B (zh) * 2010-12-24 2013-09-11 费金华 磁性帆示波器
EP2474542A1 (en) 2010-12-29 2012-07-11 Bayer CropScience AG Fungicide hydroximoyl-tetrazole derivatives
AR090010A1 (es) 2011-04-15 2014-10-15 Bayer Cropscience Ag 5-(ciclohex-2-en-1-il)-penta-2,4-dienos y 5-(ciclohex-2-en-1-il)-pent-2-en-4-inos sustituidos como principios activos contra el estres abiotico de las plantas, usos y metodos de tratamiento
AR085585A1 (es) 2011-04-15 2013-10-09 Bayer Cropscience Ag Vinil- y alquinilciclohexanoles sustituidos como principios activos contra estres abiotico de plantas
EP2718443B1 (en) 2011-06-06 2017-11-29 Bayer CropScience NV Methods and means to modify a plant genome at a preselected site
JP2014520776A (ja) 2011-07-04 2014-08-25 バイエル・インテレクチユアル・プロパテイー・ゲー・エム・ベー・ハー 植物における非生物的ストレスに対する活性薬剤としての置換されているイソキノリノン類、イソキノリンジオン類、イソキノリントリオン類およびジヒドロイソキノリノン類または各場合でのそれらの塩の使用
AU2012293636B2 (en) 2011-08-10 2015-12-03 Bayer Intellectual Property Gmbh Active compound combinations comprising specific tetramic acid derivatives
US20140221210A1 (en) 2011-09-09 2014-08-07 Peter Dahmen Acyl-homoserine lactone derivatives for improving plant yield
BR112014005471A2 (pt) 2011-09-12 2017-03-28 Bayer Ip Gmbh compostos de fórmula (i), (v), (vii), composição fungicida, método para o controle dos fungos fitopatogênicos das culturas, utilização dos compostos de fórmula (i) e processo para a produção das composições para o controle de fungos nocivos fitopatogênicos
JP6138797B2 (ja) 2011-09-16 2017-05-31 バイエル・インテレクチュアル・プロパティ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツングＢａｙｅｒ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ ＧｍｂＨ 植物収量を向上させるためのアシルスルホンアミド類の使用
CA2848625A1 (en) 2011-09-16 2013-03-21 Bayer Intellectual Property Gmbh Use of mefenpyr-diethyl in combination with prothioconazole and tebuconazole for improving plant yield
EP2755484A1 (en) 2011-09-16 2014-07-23 Bayer Intellectual Property GmbH Use of 5-phenyl- or 5-benzyl-2 isoxazoline-3 carboxylates for improving plant yield
JP2014527973A (ja) 2011-09-23 2014-10-23 バイエル・インテレクチユアル・プロパテイー・ゲー・エム・ベー・ハー 非生物的な植物ストレスに対する作用剤としての４−置換１−フェニルピラゾール−３−カルボン酸誘導体の使用
CN102495982B (zh) * 2011-11-30 2014-12-24 成都七巧软件有限责任公司 一种基于进程线程的防拷贝系统和防拷贝存储介质
CN102915744A (zh) * 2012-09-28 2013-02-06 山推楚天工程机械有限公司 铁磁性金属工件的物料代码磁记录读取装置及方法
CN106431008B (zh) * 2016-09-30 2018-10-30 浙江锦源实业有限公司 一种具有前后阻挡装置的镀膜模板机构
CN109471504B (zh) * 2018-10-22 2022-04-05 国网山东省电力公司烟台供电公司 一种分区实时电价计算系统
US10950266B1 (en) * 2020-02-28 2021-03-16 Western Digital Technologies, Inc. In-situ NFT pre-treatment to accumulate optically transparent material on NFT to improve reliability
CN111351723B (zh) * 2020-03-12 2022-10-14 河北交规院瑞志交通技术咨询有限公司 一种防眩板抗冲击性能试验装置及方法
JP7258804B2 (ja) * 2020-03-18 2023-04-17 株式会社東芝 磁気ディスク装置及びライト処理方法
US11436970B2 (en) * 2020-07-16 2022-09-06 Huayuan Semiconductor (Shenzhen) Limited Company Addressing and redundancy schemes for distributed driver circuits in a display device
JP2022045670A (ja) * 2020-09-09 2022-03-22 株式会社東芝 磁気ディスク装置及び記録領域の設定方法
CN112987609A (zh) * 2021-02-05 2021-06-18 爱威科技股份有限公司 主从驱动装置驱动控制方法与系统
CN113624920A (zh) * 2021-08-02 2021-11-09 上海德衡数据科技有限公司 一种水下数据中心防水的方法及系统
CN116688967B (zh) * 2023-07-25 2023-10-13 清徐泓博污水处理有限公司 一种基于dbd等离子体的多自由度式活性炭再生器及使用方法
CN116689188B (zh) * 2023-08-01 2023-10-20 江苏安江汽车部件有限公司 一种汽车饰板喷漆输送线及其工作方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441611A1 (en) * 1990-02-06 1991-08-14 Sharp Kabushiki Kaisha Magneto-optical recording medium and method for processing the surface
JPH04140192A (ja) * 1990-10-02 1992-05-14 Sumitomo Bakelite Co Ltd 磁気カード
JPH0655526A (ja) * 1992-08-05 1994-03-01 Kitagawa Iron Works Co Ltd コンクリートミキサの自動洗浄装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53117402A (en) * 1977-03-23 1978-10-13 Mitsubishi Electric Corp Video disc
JPS57172532A (en) * 1981-04-15 1982-10-23 Fujitsu Ltd Writing system for optical disk
JPS6055526A (ja) * 1983-09-06 1985-03-30 Ricoh Co Ltd 光ディスク記憶装置における光ディスク
JPS6095745A (ja) * 1983-10-31 1985-05-29 Hikari Yokoekawa 複数記録面のデイスクと装置
EP0167570A1 (en) * 1983-12-27 1986-01-15 Ncr Corporation Magnetic record medium and apparatus and method for tracking the same
JPS60261043A (ja) * 1984-06-07 1985-12-24 Victor Co Of Japan Ltd 情報記録媒体円盤
JPS6278704A (ja) * 1985-10-02 1987-04-11 Olympus Optical Co Ltd 磁界発生装置
JPS6295747A (ja) * 1985-10-22 1987-05-02 Toray Ind Inc 光学記録体
JPS62173630A (ja) * 1986-01-28 1987-07-30 Matsushita Electric Ind Co Ltd 光デイスク
JPH01204270A (ja) * 1988-02-08 1989-08-16 Toshiba Corp 情報処理装置
JPH03297699A (ja) * 1990-04-17 1991-12-27 Hitachi Maxell Ltd 感熱磁気記録媒体
JPH0434764A (ja) * 1990-05-28 1992-02-05 Internatl Business Mach Corp <Ibm> 磁気ディスク
JP3128774B2 (ja) * 1990-11-30 2001-01-29 大日本印刷株式会社 磁気感熱記録媒体
DE69230101T2 (de) * 1991-06-04 2000-03-02 Quantum Corp Miniaturplattenantriebsgerät mit eingebettetem Servosektor und trennbaren Datenfeldern und sofortiger Datenblockreihenfolge
US5345435A (en) * 1991-08-30 1994-09-06 Sony Corporation Optical disc and method for recording on optical disc
EP0549488B1 (en) * 1991-12-20 1998-09-30 Eastman Kodak Company A storage media for an optical information system having an identification code embedded therein
US5682360A (en) * 1992-01-29 1997-10-28 Matsushita Electric Industrial Co., Ltd. Recording and reproducing apparatus for use with a recording medium having an optical recording layer and magnetic recording layer
CN1075024A (zh) * 1992-01-29 1993-08-04 松下电器产业株式会社 录放装置
JPH05314433A (ja) * 1992-05-13 1993-11-26 Dainippon Ink & Chem Inc 磁気カード
JPH05325398A (ja) * 1992-05-27 1993-12-10 Sony Corp ディスク記録再生装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441611A1 (en) * 1990-02-06 1991-08-14 Sharp Kabushiki Kaisha Magneto-optical recording medium and method for processing the surface
JPH04140192A (ja) * 1990-10-02 1992-05-14 Sumitomo Bakelite Co Ltd 磁気カード
JPH0655526A (ja) * 1992-08-05 1994-03-01 Kitagawa Iron Works Co Ltd コンクリートミキサの自動洗浄装置

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KR100195398B1 (ko) 1999-06-15
CN1941125A (zh) 2007-04-04
CN1098810A (zh) 1995-02-15
CA2113877A1 (en) 1994-07-22
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EP0608126A2 (en) 1994-07-27
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EP0609013A3 (en) 1995-11-29
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