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公开(公告)号：DE60123859T2
公开(公告)日：2007-05-31
申请号：DE60123859
申请日：2001-03-02
Applicant: SONY CORP
Inventor： KUROKAWA KOTARO , YASUDA KOICHI , YAMASAKI TAKESHI , YUKUMOTO TOMOMI
Abstract: Initialization nonuniformity due to interference of light which occurs during an initialization process is reduced without causing degradation in the characteristic of signals recorded/reproduced on/from respective recording layers. A multilayer optical disk comprising at least a first information recording layer and a second information recording layer formed, on a substrate, into a multilayer structure with an intermediate layer disposed therebetween is illuminated with initializing light from the side of the first information recording layer to initialize the first information recording layer formed of a phase-change material serving as a recording material. The illumination with the initializing light is performed such that the numerical aperture NA of an objective lens used for illumination with the illuminating light, the longitudinal length L of the beam size of the initializing light, the thickness D of the intermediate layer, and the ratio R1 of the amount of light striking the first information recording layer after passing through the first information recording layer and being reflected by the second information recording layer to the amount of light incident on the first information recording layer satisfy the following relation for a wavelength lambda i of the initializing light: L x R1 ≤ 25Ä1 - exp(-0.0004 x NA x D )Ü.
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公开(公告)号：HK1033381A1
公开(公告)日：2001-08-24
申请号：HK01102136
申请日：2001-03-23
Applicant: SONY CORP
Inventor： YASUDA KOICHI , KUROKAWA KOTARO
Abstract: A multi-layered optical disc having its recording unit comprised of plural information recording layers (4,6), in which two or more information recording layers are layered on a substrate (2) 0.3 to 1.2mm in thickness, with the interposition of a transparent layer (5), to form a recording unit, a light transmitting protective layer is formed on the recording unit to a thickness of 10 to 177 mu m (7), and in which the light is illuminated from the side of the light transmitting protective layer to effect recording and/or reproduction of information signals. At least one of the information recording layers (6) except the information recording layer formed at a remotest position from the light transmitting protective layer has a phase change material as a recording material. A refractive index nc1 and an extinction coefficient kc1 in the crystallized state and a refractive index na1 and an extinction coefficient ka1 in the amorphous state of the phase change material constituting the first information recording layer (6) as counted from the light transmitting protective layer satisfy the relationship of (nc1/na1) ≤ 12, (kc1/ka1) ≤ 12 and (kc1/ka1) ≤ 5 (nc1/na1), where the cases of kc1/ka1
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公开(公告)号：ID20218A
公开(公告)日：1998-10-29
申请号：ID980613
申请日：1998-04-23
Applicant: SONY CORP
Inventor： KAWAKUBO OSAMU , KASHIWAGI TOSHIYUKI , YASUDA KOICHI , KANEKO MASAHIKO
IPC: G11B7/007 , G11B7/125 , G11B7/127 , G11B7/135 , G11B7/1372 , G11B7/24 , G11B7/254 , G11B7/257 , G11B11/10
Abstract: An optical recording medium is provided which achieves a higher recording capacity. This optical recording medium includes a base formed of thermoplastic resin which has a thickness ranging from between approximately 0.3 to 1.2 mm, a guide groove formed on the base, an information recording layer formed at least of a reflective film and an organic dye recording layer provided on the guide groove, and a light transmissive layer having a thickness ranging from between approximately 3 to 177 mum. In this optical recording medium, the unevenness DELTAt of the thickness of the light transmissive layer is set within the range of:wherein N.A. represents a numerical aperture of an optical head device of the optical disk recording and/or reproducing apparatus and lambd represents the wavelength of laser light utilized by the optical disk recording and/or reproducing apparatus.
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公开(公告)号：EP1285775A4
公开(公告)日：2007-11-14
申请号：EP02705406
申请日：2002-03-20
Applicant: SONY CORP
Inventor： KUROKAWA KOTARO , YASUDA KOICHI
CPC classification number: G11B7/243 , G11B7/006 , G11B7/24038 , G11B7/2578 , G11B2007/24304 , G11B2007/24308 , G11B2007/24312 , G11B2007/24314 , G11B2007/24316
Abstract: The present invention is a multilayer optical disc formed of a plurality of information recording sections having a phase change recording layer. A first information recording section provided at a laser-incident side uses, as a recording material, a phase change recording material which uses Sb and Te as major components and satisfies their ratio of 2.3
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公开(公告)号：CA2459838A1
公开(公告)日：2004-01-15
申请号：CA2459838
申请日：2003-07-04
Applicant: SONY CORP
Inventor： YASUDA KOICHI
Abstract: An optical recording medium comprising substrate (11) having indented configuration for demarcating track zones provided on a surface thereof, the indented configuration provided surface sequentially overlaid with optical recording layer (12) comprising a compound of at least tin (Sn), nitrogen (N ) and oxygen (O) and light transmission layer (13). The compound composition SnxNyOz of tin (Sn), nitrogen (N) and oxygen (O) constituting the optical recording layer (12) satisfies the relationships: 30
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Patent Agency Ranking
公开(公告)号：DE60123859T8
公开(公告)日：2007-09-06
申请号：DE60123859
申请日：2001-03-02
Applicant: SONY CORP
Inventor： KUROKAWA KOTARO , YASUDA KOICHI , YAMASAKI TAKESHI , YUKUMOTO TOMOMI
Abstract: Initialization nonuniformity due to interference of light which occurs during an initialization process is reduced without causing degradation in the characteristic of signals recorded/reproduced on/from respective recording layers. A multilayer optical disk comprising at least a first information recording layer and a second information recording layer formed, on a substrate, into a multilayer structure with an intermediate layer disposed therebetween is illuminated with initializing light from the side of the first information recording layer to initialize the first information recording layer formed of a phase-change material serving as a recording material. The illumination with the initializing light is performed such that the numerical aperture NA of an objective lens used for illumination with the illuminating light, the longitudinal length L of the beam size of the initializing light, the thickness D of the intermediate layer, and the ratio R1 of the amount of light striking the first information recording layer after passing through the first information recording layer and being reflected by the second information recording layer to the amount of light incident on the first information recording layer satisfy the following relation for a wavelength lambda i of the initializing light: L x R1 ≤ 25Ä1 - exp(-0.0004 x NA x D )Ü.
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公开(公告)号：DE60123859D1
公开(公告)日：2006-11-30
申请号：DE60123859
申请日：2001-03-02
Applicant: SONY CORP
Inventor： KUROKAWA KOTARO , YASUDA KOICHI , YAMASAKI TAKESHI , YUKUMOTO TOMOMI
Abstract: Initialization nonuniformity due to interference of light which occurs during an initialization process is reduced without causing degradation in the characteristic of signals recorded/reproduced on/from respective recording layers. A multilayer optical disk comprising at least a first information recording layer and a second information recording layer formed, on a substrate, into a multilayer structure with an intermediate layer disposed therebetween is illuminated with initializing light from the side of the first information recording layer to initialize the first information recording layer formed of a phase-change material serving as a recording material. The illumination with the initializing light is performed such that the numerical aperture NA of an objective lens used for illumination with the illuminating light, the longitudinal length L of the beam size of the initializing light, the thickness D of the intermediate layer, and the ratio R1 of the amount of light striking the first information recording layer after passing through the first information recording layer and being reflected by the second information recording layer to the amount of light incident on the first information recording layer satisfy the following relation for a wavelength lambda i of the initializing light: L x R1 ≤ 25Ä1 - exp(-0.0004 x NA x D )Ü.
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公开(公告)号：ID24789A
公开(公告)日：2000-08-16
申请号：ID20000113
申请日：2000-02-10
Applicant: SONY CORP
Inventor： YASUDA KOICHI , KUROKAWA KOTARO
Abstract: A multi-layered optical disc having its recording unit comprised of plural information recording layers (4,6), in which two or more information recording layers are layered on a substrate (2) 0.3 to 1.2mm in thickness, with the interposition of a transparent layer (5), to form a recording unit, a light transmitting protective layer is formed on the recording unit to a thickness of 10 to 177 mu m (7), and in which the light is illuminated from the side of the light transmitting protective layer to effect recording and/or reproduction of information signals. At least one of the information recording layers (6) except the information recording layer formed at a remotest position from the light transmitting protective layer has a phase change material as a recording material. A refractive index nc1 and an extinction coefficient kc1 in the crystallized state and a refractive index na1 and an extinction coefficient ka1 in the amorphous state of the phase change material constituting the first information recording layer (6) as counted from the light transmitting protective layer satisfy the relationship of (nc1/na1) ≤ 12, (kc1/ka1) ≤ 12 and (kc1/ka1) ≤ 5 (nc1/na1), where the cases of kc1/ka1
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公开(公告)号：EP1609614A4
公开(公告)日：2006-07-26
申请号：EP04719136
申请日：2004-03-10
Applicant: SONY CORP
Inventor： YASUDA KOICHI , OYAMADA MITSUAKI , NAKANO JUN , MITSUI NORIO , TAMADA SAKUYA
CPC classification number: G11B7/257 , G11B7/243 , G11B2007/24312 , G11B2007/2432 , G11B2007/24322 , G11B2007/2571
Abstract: An optical recording medium using Sn as the recording material to improve the jitter is provided, in which on the surface of a disc substrate 11 where a concave and convex shape dividing a track area is formed, are formed on the surface of the concave and convex shape a first protective layer 31 for protecting at least an optical recording layer 31, an optical recording layer 12 using a chemical compound at least composed of tin (Sn), nitrogen (N) and oxygen (O), formed on the first protective layer, a second protective layer 32 for protecting this optical recording layer, formed on this optical recording layer, and a light-transmittable layer 13 formed on the second protective layer; with this structure, the optical recording layer 12 under high temperature and high humidity can be stabilized by means of the first and second protective layers 31 and 32.
Abstract translation: 提供了一种使用Sn作为记录材料以改善抖动的光记录介质，其中在凹凸形状的表面上形成有划分轨道区域的凹凸形状的盘基板11的表面 形成用于至少保护光学记录层31的第一保护层31，使用至少由锡（Sn），氮（N）和氧（O）组成的化合物形成在第一保护层上的光学记录层12 形成在该光记录层上的用于保护该光记录层的第二保护层32和形成在第二保护层上的透光层13; 通过这种结构，可以通过第一和第二保护层31和32稳定高温和高湿度下的光学记录层12。
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公开(公告)号：DE60232293D1
公开(公告)日：2009-06-25
申请号：DE60232293
申请日：2002-03-20
Applicant: SONY CORP
Inventor： KUROKAWA KOTARO , YASUDA KOICHI
Abstract: The present invention is a multilayer optical disc formed of a plurality of information recording sections having a phase change recording layer. A first information recording section provided at a laser-incident side uses, as a recording material, a phase change recording material which uses Sb and Te as major components and satisfies their ratio of 2.3
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