公开(公告)号：US20060153051A1

公开(公告)日：2006-07-13

申请号：US10562901

申请日：2004-06-29

申请人： Takashi Kikukawa ,  Narutoshi Fukuzawa ,  Tatsuhiro Kobayashi

发明人： Takashi Kikukawa ,  Narutoshi Fukuzawa ,  Tatsuhiro Kobayashi

IPC分类号： G11B7/24

CPC分类号： G11B7/00454 ,  G11B7/00452 ,  G11B7/24038 ,  G11B7/24065 ,  G11B7/243 ,  G11B2007/24304 ,  G11B2007/2432 ,  G11B2007/25706 ,  G11B2007/25715

摘要： An optical recording medium 10 having a substrate 11, an optically transparent layer 12, and a first dielectric layer 31, a noble metal oxide layer 23, a second dielectric layer 32, a light absorbing layer 22, a third dielectric layer 33 and a reflecting layer 21 which are disposed between the optically transparent layer 12 and the substrate 11, records and reproduces data into and from the optical recording medium 10 by irradiating the optical recording medium 10 with a laser beam 40 from the optically transparent layer 12 side. λ/NA is set to be not longer than 640 nm when λ designates a wavelength of the laser beam 40 and NA designates a numerical aperture of an objective lens, and setting is done as Pw×0.1≦Pr≦Pw×0.5 when Pw and Pr designate recording power and reproducing power of the laser beam 40 respectively, while a recording mark train including recording marks each having a length not larger than λ/4 NA is recorded and data are reproduced from the recording mark train.

摘要翻译： 具有基板11，光学透明层12和第一介电层31，贵金属氧化物层23，第二电介质层32，光吸收层22，第三电介质层33和反射的光记录介质10 设置在光学透明层12和基板11之间的层21通过用光学透明层12侧的激光束40照射光学记录介质10来记录数据并从光学记录介质10再现数据。 当λ表示激光束40的波长，NA表示物镜的数值孔径时，λ/ NA设定为不大于640nm，并且设定为Pwx0.1 <= Pr <= Pwx0.5，当 Pw和Pr分别指示激光束40的记录功率和再现功率，同时记录包括具有不大于λ/ 4NA的长度的记录标记的记录标记列，并且从记录标记列再现数据。

公开(公告)号：US20060126482A1

公开(公告)日：2006-06-15

申请号：US10561096

申请日：2004-06-30

申请人： Takashi Kikukawa ,  Narutoshi Fukuzawa ,  Tatsuhiro Kobayashi

发明人： Takashi Kikukawa ,  Narutoshi Fukuzawa ,  Tatsuhiro Kobayashi

IPC分类号： G11B7/24

CPC分类号： G11B7/00452 ,  G11B7/24 ,  G11B7/252 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316

摘要： It is an object of the present invention to provide an optical recording disc which can record data constituted by a recording mark train including recording marks and blank regions neighboring recording marks therein and reproduce the data therefrom even in the case where the lengths of a recording mark and a blank region between neighboring recording marks are shorter than the resolution limit, thereby markedly increasing the storage capacity thereof and can improve the C/N ratio of the reproduced signal. An optical recording disc includes a substrate 2, a third dielectric layer 3, a light absorption layer 4, a second dielectric layer 5, a decomposition reaction layer 6 containing platinum oxide as a primary component, a first dielectric layer 7 and a light transmission layer 8 and wherein the second dielectric layer has a thickness of 20 nm to 100 nm and the optical recoding disc is constituted so that when it is irradiated with a laser beam 20 from the side of the light transmission layer 8, the platinum oxide contained in the decomposition reaction layer 6 as a primary component is decomposed into platinum and oxygen so that a bubble pit is formed in the decomposition reaction layer 6 by thus generated oxygen gas and fine particles of the noble metal precipitate into the bubble pit, thereby forming a recording mark in the decomposition reaction layer 6.

摘要翻译： 本发明的目的是提供一种光学记录盘，其可以记录由包括记录标记和包括记录标记在内的空白区域的记录标记列构成的数据，并且即使在记录标记的长度的情况下再现数据 并且相邻记录标记之间的空白区域比分辨率极限短，从而显着增加其存储容量，并且可以提高再现信号的C / N比。 光记录盘包括基板2，第三电介质层3，光吸收层4，第二电介质层5，含有氧化铂作为主要成分的分解反应层6，第一电介质层7和光透射层 8，其中所述第二电介质层的厚度为20nm至100nm，并且所述光学记录盘被构造成使得当从所述光透射层8的一侧照射激光束20时， 作为主要成分的分解反应层6分解为铂和氧，从而通过这样产生的氧气在分解反应层6中形成气泡，并且贵金属的细颗粒沉淀到气泡坑中，从而形成记录标记 在分解反应层6中。

公开(公告)号：US06901036B2

公开(公告)日：2005-05-31

申请号：US09942036

申请日：2001-08-30

申请人： Junji Tominaga ,  Takashi Nakano ,  Nobufumi Atoda ,  Akira Sato ,  Manami Kuiseko ,  Takashi Kikukawa

发明人： Junji Tominaga ,  Takashi Nakano ,  Nobufumi Atoda ,  Akira Sato ,  Manami Kuiseko ,  Takashi Kikukawa

IPC分类号： G11B7/005 ,  G11B7/013 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/131 ,  G11B7/1381 ,  G11B7/24085

摘要： An apparatus for reproducing information stored in an optical recording medium which comprises marks or pits which are arranged at a pitch less than λ/2NA, wherein λ is a wavelength of light used for reproduction and NA is an numerical aperture of an objective lens. The apparatus generally comprises a laser diode, a polarization beam splitter, an objective lens, beam splitters, a low-frequency light detecting system with a photodetector, a high-frequency light detecting system with a photodetector, and a signal processing circuit for combining detection signals from the photodetectors. In the high-frequency light detecting system, before a convergent lens, a shielding band is provided so as to shield the middle of a bundle of rays of reproduction light.

摘要翻译： 一种用于再现存储在光学记录介质中的信息的装置，包括以小于λ/ 2NA的间距排列的标记或凹坑，其中λ是用于再现的光的波长，NA是物镜的数值孔径。 该装置通常包括激光二极管，偏振分束器，物镜，分束器，具有光电检测器的低频光检测系统，具有光电检测器的高频光检测系统，以及用于组合检测的信号处理电路 来自光电探测器的信号。 在高频光检测系统中，在会聚透镜之前，设置屏蔽带以屏蔽再生光束的中间。

公开(公告)号：US20050105418A1

公开(公告)日：2005-05-19

申请号：US10929894

申请日：2004-08-30

申请人： Masashi Kuwahara ,  Takayuki Shima ,  Junji Tominaga ,  Takashi Kikukawa ,  Narutoshi Fukuzawa ,  Tatsuhiro Kobayashi

发明人： Masashi Kuwahara ,  Takayuki Shima ,  Junji Tominaga ,  Takashi Kikukawa ,  Narutoshi Fukuzawa ,  Tatsuhiro Kobayashi

IPC分类号： G11B7/243 ,  G03G5/05 ,  G11B5/09 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/125 ,  G11B7/24

CPC分类号： G11B7/24 ,  G03G5/0564 ,  G11B7/00456 ,  G11B7/1267

摘要： A method for determining a read power of a laser beam according to the present invention includes a step of setting a power of a laser beam to a recommended recording power Pw′ and forming a recording mark train including at least one of a recording mark having a length shorter than a resolution limit and a blank region having a length shorter than the resolution limit in an optical recording disc, thereby recording test data therein, a step of setting the power of the laser beam to a recommended read power Pr′ and reproducing the test data recorded in the optical recording disc, a step of judging whether or not signal characteristics of a reproduced signal obtained by reproducing the test data satisfies reference conditions, and determining an optimum read power of the laser beam based on the result of the judgment. According to the thus constituted method for determining a read power of a laser beam, even in the case where the length of a recording mark or the length of a blank region between neighboring recording marks is shorter than the resolution limit, it is possible to record and reproduce a recording mark train including these recording marks and blank regions. Therefore, this method can be applied to an optical recording medium whose storage capacity is markedly increased.

摘要翻译： 根据本发明的用于确定激光束的读取功率的方法包括将激光束的功率设置为推荐的记录功率Pw'并形成记录标记列的步骤，该记录标记列包括具有 长度短于分辨率极限，并且具有长度短于光学记录盘中的分辨率极限的空白区域，从而在其中记录测试数据，将激光束的功率设置为推荐读取功率Pr'并再现 记录在光学记录盘中的测试数据，判断通过再现测试数据获得的再现信号的信号特性是否满足参考条件，并且基于判断结果确定激光束的最佳读取功率的步骤。 根据如此构成的确定激光束的读取功率的方法，即使在记录标记的长度或相邻记录标记之间的空白区域的长度短于分辨率限制的情况下，也可以记录 并且再现包括这些记录标记和空白区域的记录标记列。 因此，该方法可以应用于存储容量明显增加的光记录介质。

公开(公告)号：US06465070B2

公开(公告)日：2002-10-15

申请号：US09760847

申请日：2001-01-17

申请人： Takashi Kikukawa ,  Hajime Utsunomiya

发明人： Takashi Kikukawa ,  Hajime Utsunomiya

IPC分类号： B32B302

CPC分类号： G11B7/243 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10T428/21

摘要： High temperature reliability, and in particular, the high temperature reliability after repeated overwriting operations is improved in an optical recording medium wherein a material of Ag—In—Sb—Te system is used for the recording layer. Provided is an optical recording medium having a recording layer of phase change type, wherein said recording layer contains Ag, In, Sb, and Te as its main components, and Ge as its sub-component such that, when molar ratio of the elements constituting the main and sub-components is represented by formula (I): (AgaInbSbcTed) (1-e/100)Gee, 2≦a≦20, 2≦b≦20, 35≦c≦80, 8≦d≦40, a+b+c+d=100, and 1≦e≦15.

摘要翻译： 特别是在采用Ag-In-Sb-Te系统的材料用于记录层的光记录介质中，改进了重复重写操作后的高温可靠性。 提供了具有相变型记录层的光记录介质，其中所述记录层包含Ag，In，Sb和Te作为其主要成分，Ge作为其子组分，使得当构成 主分量和子成分由式（I）表示：（AgaInbSbcTed）（1-e / 100）Gee，2 <= a <= 20,2 <= b <= 20,35 <= c < 8 <= d <= 40，a + b + c + d = 100，1 <= e <= 15。

公开(公告)号：US06461710B1

公开(公告)日：2002-10-08

申请号：US09456404

申请日：1999-12-08

申请人： Takashi Kikukawa ,  Hajime Utsunomiya

发明人： Takashi Kikukawa ,  Hajime Utsunomiya

IPC分类号： B32B302

CPC分类号： B82Y10/00 ,  C23C14/0623 ,  G11B7/24 ,  G11B7/243 ,  G11B7/257 ,  Y10T428/21

摘要： In an optical recording medium wherein a layer of nonlinear optical material and a recording layer of phase change type are formed extreme close to each other to enable reading of small record marks beyond diffraction limit, a high C/N is realized and decrease of the C/N in the reading is also suppressed. More illustratively, the optical recording medium has a mask layer (nonlinear optical material layer) and a recording layer of phase change type formed to sandwich an intermediate dielectric layer such that an optical aperture can be formed in the mask layer by irradiation of reading light beam from the side of the mask layer. The intermediate dielectric layer has a thickness of 5 to 70 nm; or near field light generated near the optical aperture is used in the reading. The recording layer contains Ag, In, Sb and Te as its main components and Ge and/or N as its sub-component.

摘要翻译： 在其中非线性光学材料层和相变型记录层形成为非常接近以使得能够读取超出衍射极限的小记录标记的光记录介质中，实现了高C / N，并降低了C / N在阅读中也被抑制。 更具体地说，光学记录介质具有掩模层（非线性光学材料层）和相变型记录层，以形成夹层中间介质层，使得通过读取光束的照射可以在掩模层中形成光学孔 从掩模层的一侧。 中间介电层的厚度为5〜70nm; 或在光学孔径附近产生的近场光用于读取。 记录层包含Ag，In，Sb和Te作为其主要组分，Ge和/或N作为其子组分。

公开(公告)号：US06406772B2

公开(公告)日：2002-06-18

申请号：US09737776

申请日：2000-12-18

申请人： Junji Tominaga ,  Isamu Kuribayashi ,  Makoto Takahashi ,  Takashi Kikukawa

发明人： Junji Tominaga ,  Isamu Kuribayashi ,  Makoto Takahashi ,  Takashi Kikukawa

IPC分类号： B32B302

CPC分类号： B60L11/1809 ,  B60L2210/20 ,  G11B7/243 ,  G11B7/257 ,  G11B7/2595 ,  G11B7/26 ,  G11B7/266 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  H02J7/0011 ,  H02J7/0063 ,  H02J7/14 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T10/725 ,  Y02T90/127 ,  Y02T90/14 ,  Y10S430/146 ,  Y10T428/21

摘要： A phase change optical recording medium has on a substrate a recording layer consisting essentially of a Sb base thin film and a reactive thin film. The Sb base thin film is formed by depositing a Sb base material containing at least 95 at % of Sb to a thickness of 70-150 Å. The reactive thin film is formed of a material which forms a phase change recording material when mixed with Sb. The reactive thin film is typically formed of an In—Ag—Te or Ge—Te material. Stable write/read characteristics are accomplished at the first overwriting, initializing operation is eliminated, and rewriting is impossible at the same linear velocity as recording.

摘要翻译： 相变光记录介质在基板上具有基本上由Sb基薄膜和反应性薄膜组成的记录层。 Sb基薄膜通过沉积含有至少95原子％的Sb的Sb基材料形成，厚度为70-150埃。 反应性薄膜由与Sb混合时形成相变记录材料的材料形成。 反应性薄膜通常由In-Ag-Te或Ge-Te材料形成。 在第一次重写时可以实现稳定的写入/读取特性，消除了初始化操作，并且以与记录相同的线速度不可能进行重写。

公开(公告)号：US6111849A

公开(公告)日：2000-08-29

申请号：US163605

申请日：1998-09-30

申请人： Jiro Yoshinari ,  Masanori Kosuda ,  Hiroshi Shingai ,  Takashi Kikukawa

发明人： Jiro Yoshinari ,  Masanori Kosuda ,  Hiroshi Shingai ,  Takashi Kikukawa

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/243 ,  G11B7/26 ,  G11B7/30 ,  B32B3/00

CPC分类号： G11B7/0062 ,  G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B7/00454 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/257 ,  G11B7/258 ,  Y10T428/21

摘要： An optical recording medium comprising a substrate, at least one dielectric layer and a phase change type recording layer. In overwriting, the recording medium should satisfy the condition V.sub.OW /V.sub.OP

摘要翻译： 一种光记录介质，包括基底，至少一个电介质层和相变型记录层。 在重写中，记录介质应满足条件VOW / VOP <1，优选为0.5≤VOW/ VOP <0.95，其中VOP是最佳线速度，VOW是用于重写的线速度。 这使得记录标记的记录介质在60至80℃下已被储存至少100小时后，可以将介质上记录标记的可擦除性至少为26dB。

公开(公告)号：US5891542A

公开(公告)日：1999-04-06

申请号：US982499

申请日：1997-12-02

申请人： Junji Tominaga ,  Takashi Kikukawa ,  Isamu Kuribayashi ,  Makoto Takahashi

发明人： Junji Tominaga ,  Takashi Kikukawa ,  Isamu Kuribayashi ,  Makoto Takahashi

IPC分类号： B41M5/26 ,  C03C17/22 ,  C23C14/06 ,  G11B7/243 ,  B32B3/00

CPC分类号： G11B7/243 ,  C03C17/22 ,  C03C2217/289 ,  G11B2007/24308 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B7/252 ,  G11B7/254 ,  G11B7/258 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

摘要： One object of the invention is to achieve a phase change type optical recording medium having high degree of modulation and recording sensitivity, and another object of the invention is to achieve a phase change type optical recording medium having already stable write/read characteristics at the time of the first overwriting. The optical recording medium comprises a recording layer made up of an optical recording material containing given amounts of In, Ag, Te and Sb. In one Raman spectrum embodiment of the optical recording there are a scattering peak I-1 having a Raman shift in a range of 113 to 117 cm.sup.-1 and a scattering peak I-2 having a Raman shift in a range of 123 to 127 cm.sup.-1, said scattering peak I-2 being larger in half-width than said scattering peak I-1. In another Raman spectrum embodiment, there are a scattering peak II-1 having a Raman shift in a range of 105 to 125 cm.sup.-1 and a scattering peak II-2 having a Raman shift in a range of 140 to 160 cm.sup.-1, said scattering peak II-1 being higher in intensity than said scattering peak II-2.

摘要翻译： 本发明的一个目的是实现具有高调制度和记录灵敏度的相变型光学记录介质，并且本发明的另一个目的是实现当时具有稳定的写入/读取特性的相变型光学记录介质 的第一次覆盖。 光记录介质包括由含有给定量的In，Ag，Te和Sb的光记录材料构成的记录层。 在光记录的一个拉曼光谱实施例中，存在拉曼位移在113至117cm -1范围内的散射峰I-1和拉曼位移在123至127cm的范围内的散射峰I-2 -1，所述散射峰I-2的半宽度大于所述散射峰I-1。 在另一个拉曼光谱实施例中，存在拉曼位移在105至125cm -1范围内的散射峰II-1和拉伸位移在140至160cm -1范围内的散射峰II-2， 所述散射峰II-1的强度高于所述散射峰II-2。

公开(公告)号：US08649250B2

公开(公告)日：2014-02-11

申请号：US13032274

申请日：2011-02-22

申请人： Hideki Hirata ,  Takashi Kikukawa ,  Atsuko Kosuda ,  Motohiro Inoue

发明人： Hideki Hirata ,  Takashi Kikukawa ,  Atsuko Kosuda ,  Motohiro Inoue

IPC分类号： G11B7/24

CPC分类号： G11B7/24038

摘要： A series of optical recording media is provided to reduce a burden on an optical pickup by introducing a standardized idea among a plurality of optical recording media. In the series of optical recording media, optical recording media are of a plurality of types, each optical recording medium including a plurality of planar recording and reading layers with no projections and depressions for tracking control, and a servo layer with projections and depressions for tracking control. The plurality of optical recording media have different numbers of stacked recording and reading layers, and the positions of the servo layers with respect to the corresponding light incident surfaces are standardized among the plurality of optical recording media.

摘要翻译： 提供了一系列光记录介质，通过在多个光记录介质之间引入标准化的想法来减轻光拾取器的负担。 在一系列光记录介质中，光记录介质是多种类型的，每个光记录介质包括多个不具有用于跟踪控制的凹凸的平面记录和读取层，以及具有用于跟踪的凹凸的伺服层 控制。 多个光记录介质具有不同数量的堆叠记录和读取层，并且伺服层相对于相应的光入射面的位置在多个光记录介质之间被标准化。