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WO2008142928A1 - 光記録媒体及びその再生方法 - Google Patents

光記録媒体及びその再生方法 Download PDF

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Publication number
WO2008142928A1
WO2008142928A1 PCT/JP2008/057422 JP2008057422W WO2008142928A1 WO 2008142928 A1 WO2008142928 A1 WO 2008142928A1 JP 2008057422 W JP2008057422 W JP 2008057422W WO 2008142928 A1 WO2008142928 A1 WO 2008142928A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
recording medium
information
optical recording
substrate
Prior art date
Application number
PCT/JP2008/057422
Other languages
English (en)
French (fr)
Inventor
Koji Mishima
Tsutomu Aoyama
Takashi Kikukawa
Original Assignee
Tdk Corporation
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
Priority claimed from JP2007219462A external-priority patent/JP4803138B2/ja
Application filed by Tdk Corporation filed Critical Tdk Corporation
Priority to US12/451,526 priority Critical patent/US8238214B2/en
Publication of WO2008142928A1 publication Critical patent/WO2008142928A1/ja

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • 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
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

　３層以上の情報層を備え、再生時のクロストークを抑制しつつ従来よりも情報層の厚さ方向の設置密度を高めることが可能である光記録媒体及びその再生方法を提供する。光記録媒体１０は、基板１２と、第１情報層１４と、第１スペーサ層１６と、第２情報層１８と、第２スペーサ層２０と、第３情報層２２と、基板１２よりも薄いカバー層２４と、を有する３層構造であり、これらの層がこの順で基板１２の上に配置され、第１情報層１４の反射率をＲ１、第２情報層１８の反射率をＲ２、第３情報層２２の反射率をＲ３として次の式(I)を満足し、 　(Ｒ２×Ｒ３×Ｒ２)／Ｒ１≦０．００３２　式(I) 第１スペーサ層１６の厚さと第２スペーサ層２０の厚さとが等しい。
PCT/JP2008/057422 2007-05-18 2008-04-16 光記録媒体及びその再生方法 WO2008142928A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/451,526 US8238214B2 (en) 2007-05-18 2008-04-16 Optical recording medium and method for reproducing the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007-133279 2007-05-18
JP2007133279 2007-05-18
JP2007-219462 2007-08-27
JP2007219462A JP4803138B2 (ja) 2007-05-18 2007-08-27 光記録媒体及びその再生方法

Publications (1)

Publication Number Publication Date
WO2008142928A1 true WO2008142928A1 (ja) 2008-11-27

Family

ID=40031644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/057422 WO2008142928A1 (ja) 2007-05-18 2008-04-16 光記録媒体及びその再生方法

Country Status (1)

Country Link
WO (1) WO2008142928A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194390A1 (en) * 2010-02-09 2011-08-11 Chia-Tao Hsu Control method for adjusting laser power of laser beam irradiating multi-layer optical storage medium and related controller thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004213720A (ja) * 2002-12-27 2004-07-29 Tdk Corp 光記録媒体
JP2005285222A (ja) * 2004-03-30 2005-10-13 Tdk Corp 多層情報記録媒体製造方法および多層情報記録媒体製造装置
JP2006073053A (ja) * 2004-08-31 2006-03-16 Tdk Corp 光記録媒体
JP2007080303A (ja) * 2005-09-09 2007-03-29 Toshiba Corp 情報記録媒体および光ディスク装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004213720A (ja) * 2002-12-27 2004-07-29 Tdk Corp 光記録媒体
JP2005285222A (ja) * 2004-03-30 2005-10-13 Tdk Corp 多層情報記録媒体製造方法および多層情報記録媒体製造装置
JP2006073053A (ja) * 2004-08-31 2006-03-16 Tdk Corp 光記録媒体
JP2007080303A (ja) * 2005-09-09 2007-03-29 Toshiba Corp 情報記録媒体および光ディスク装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194390A1 (en) * 2010-02-09 2011-08-11 Chia-Tao Hsu Control method for adjusting laser power of laser beam irradiating multi-layer optical storage medium and related controller thereof

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