公开(公告)号：US6153355A

公开(公告)日：2000-11-28

申请号：US102745

申请日：1998-06-23

申请人： Makoto Takahashi ,  Takashi Kikukawa ,  Isamu Kuribayashi

发明人： Makoto Takahashi ,  Takashi Kikukawa ,  Isamu Kuribayashi

IPC分类号： G11B7/24 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/243 ,  G11B7/26

CPC分类号： G11B7/26 ,  G11B7/243 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B7/00557 ,  G11B7/006 ,  G11B7/258 ,  Y10S428/912 ,  Y10S428/913 ,  Y10S430/146

摘要： In a (Ge,Sb)-Te based optical recording medium of phase change type whose rate determining step in production has been initialization of the recording layer, the time required for production is reduced, and stable recording/reproducing properties are realized from the first overwriting operation. A phase-change type optical recording disc of write once read many-type requiring no initialization is also provided. The optical recording medium comprises a transparent substrate and a recording layer on the transparent substrate. The recording layer comprises at least one Te-based thin film and at least one reactive thin film, and the Te-based thin film is in contact with said reactive thin film. The Te-based thin film is formed from a Te-based material containing at least 95 at % of Te, and the reactive thin film is formed from a (Ge,Sb)-based material mainly comprising Ge and/or Sb. The optical change type material is formed by the mixing of the materials constituting the reactive thin film and Te. After forming the recording layer, the recording layer is irradiated with a continuous laser beam to mix the material constituting the Te-based thin film and the material constituting the reactive thin film.

摘要翻译： 在其中生产中的速率确定步骤已经被记录层初始化的相变型（Ge，Sb）-Te基光记录介质中，生产所需的时间减少，并且从第一 覆盖操作。 还提供了一种不需要初始化的一次写入多次读取的相变型光学记录盘。 光学记录介质包括透明基板和在透明基板上的记录层。 记录层包括至少一个Te基薄膜和至少一个反应性薄膜，Te基薄膜与所述反应性薄膜接触。 Te类薄膜由Te含量至少为95原子％的Te基材料形成，反应性薄膜由主要包含Ge和/或Sb的（Ge，Sb）基材料形成。 光学变化型材料通过混合构成反应性薄膜的材料和Te而形成。 在形成记录层之后，用连续激光束照射记录层，以混合构成Te基薄膜的材料和构成反应性薄膜的材料。

公开(公告)号：US09007883B2

公开(公告)日：2015-04-14

申请号：US14103082

申请日：2013-12-11

申请人： Motohiro Inoue ,  Tomoki Ushida ,  Atsuko Kosuda ,  Takashi Kikukawa

发明人： Motohiro Inoue ,  Tomoki Ushida ,  Atsuko Kosuda ,  Takashi Kikukawa

IPC分类号： G11B7/24 ,  G11B7/09 ,  G11B7/1267 ,  G11B7/24018 ,  G11B7/2403 ,  G11B7/24038 ,  G11B7/2405 ,  G11B7/24079 ,  G11B7/14

CPC分类号： G11B7/0903 ,  G11B7/09 ,  G11B7/1267 ,  G11B7/14 ,  G11B7/24018 ,  G11B7/2403 ,  G11B7/24038 ,  G11B7/2405 ,  G11B7/24079

摘要： An optical recording medium includes a recording and reading layer that is previously staked or formed afterword and has no concavo-convex pattern for tracking control, and a servo layer in which a concavo-convex pattern or a groove for tracking control is formed. Information can be recorded in the recording and reading layer while tracking is performed using the servo layer.

摘要翻译： 光记录介质包括预先被放样或形成的后记并且没有用于跟踪控制的凹凸图案的记录和读取层，以及形成用于跟踪控制的凹凸图案或凹槽的伺服层。 当使用伺服层执行跟踪时，信息可以被记录在记录和读取层中。

公开(公告)号：US08518514B2

公开(公告)日：2013-08-27

申请号：US13277465

申请日：2011-10-20

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

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

IPC分类号： G11B7/24

CPC分类号： G11B7/24038 ,  G11B2007/24314 ,  G11B2007/2432

摘要： Simple design of a multilayer optical recording medium is achieved while suppressing interlayer crosstalk and confocal crosstalk in the multilayer optical recording medium. Simple recording and reading control by a recording and reading unit is also achieved. The multilayer optical recording medium includes at least three or more recording and reading layers deposited one above the other with intermediate layers interposed therebetween, and information can be read by light irradiation from the layers. The intermediate layers have film thicknesses of two types or less, and all the recording and reading layers except the recording and reading layer farthest from a light incident surface have substantially the same optical constant.

摘要翻译： 在多层光学记录介质中抑制层间串扰和共焦串扰的同时实现多层光学记录介质的简单设计。 也可以通过记录和读取单元进行简单的记录和读取控制。 多层光学记录介质包括至少三个或更多个记录和读取层之间沉积的中间层，并且可以通过来自层的光照射来读取信息。 中间层具有两种或更少的膜厚度，并且离光入射表面最远的记录和读取层以外的所有记录和读取层具有基本上相同的光学常数。

公开(公告)号：US08355308B2

公开(公告)日：2013-01-15

申请号：US12005405

申请日：2007-12-26

申请人： Hidetake Itoh ,  Koji Mishima ,  Takashi Kikukawa

发明人： Hidetake Itoh ,  Koji Mishima ,  Takashi Kikukawa

IPC分类号： G11B7/013

CPC分类号： G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： An optical recording and reading method capable of enhancing the design flexibility of recording layers of an optical recording medium and performing accurate optical recording and reading operations. A basic recording layer is arranged in a position that is in the range of 90 μm to 110 μm away from a light incident surface of an optical recording medium, and recording layers are arranged in parallel with the basic recording layer. At least the position information of the recording layers is recorded in one of the basic recording layer and the recording layers.

摘要翻译： 一种光学记录和读取方法，其能够增强光记录介质的记录层的设计灵活性并执行精确的光学记录和读取操作。 基本记录层​​被布置在远离光记录介质的光入射表面的90μm至110μm的范围内，并且记录层与基本记录层​​平行布置。 至少记录层的位置信息被记录在基本记录层​​和记录层之一中。

公开(公告)号：US08339908B2

公开(公告)日：2012-12-25

申请号：US13032221

申请日：2011-02-22

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

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

IPC分类号： G11B7/00 ,  G11B7/24

CPC分类号： G11B7/0938 ,  G11B7/00736 ,  G11B7/24038 ,  G11B7/24079 ,  G11B2007/0013

摘要： An optical recording and reading method is provided in which the information necessary for recording and reading layers is quickly acquired to reduce the seek time during reading and recording. The optical recording and reading method is used for an optical recording medium that includes a plurality of recording and reading layers and a servo layer. Information is recorded on or read from the recording and reading layers by irradiating them with a recording and reading beam while the servo layer is irradiated with a servo beam to perform tracking control. When information is recorded on the recording and reading layers, control information necessary for subsequent recording and reading to be performed on the recording and reading layers is recorded on the servo layer 18. When the subsequent recording or reading is performed, the control information on the servo layer is consulted, and then the recording or reading is performed on the recording and reading layers.

摘要翻译： 提供一种光学记录和读取方法，其中快速获取记录和读取层所需的信息以减少读取和记录期间的寻道时间。 光学记录和读取方法用于包括多个记录和读取层和伺服层的光学记录介质。 当伺服层被伺服光束照射以进行跟踪控制时，通过用记录和读取光束照射记录和读取层来将信息记录在记录层和读取层上。 当信息被记录在记录层和读取层上时，对记录和读取层执行的后续记录和读取所需的控制信息被记录在伺服层18上。当执行后续的记录或读取时，控制信息 参考伺服层，然后在记录和读取层上执行记录或读取。

公开(公告)号：US08189443B2

公开(公告)日：2012-05-29

申请号：US12115040

申请日：2008-05-05

申请人： Takashi Kikukawa ,  Hidetake Itoh

发明人： Takashi Kikukawa ,  Hidetake Itoh

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10481 ,  G11B20/1816 ,  G11B2220/2541

摘要： A signal quality evaluation method is provided that can objectively evaluate signal quality regardless of a PRML detection method used. The signal quality evaluation method is used when recording and reading is performed by irradiating a medium with a laser beam having a wavelength of λ through an objective lens having a numerical aperture of NA. In the signal quality evaluation method, information of the difference between an ideal signal recoded in the medium and a real signal obtained by irradiating the medium with the laser beam is statistically analyzed for each signal level of the ideal signal. The evaluation of the quality of the real signal is made using the statistics obtained by the statistical analysis.

摘要翻译： 提供了可以客观地评估信号质量的信号质量评估方法，而不管使用什么PRML检测方法。 当通过具有数值孔径为NA的物镜用具有波长为λ的激光束照射介质进行记录和读取时，使用信号质量评估方法。 在信号质量评估方法中，对于理想信号的每个信号电平，统计分析在介质中重新编码的理想信号与通过用激光束照射介质获得的实际信号之间的差的信息。 使用统计分析得到的统计量，对实际信号的质量进行评估。

公开(公告)号：US08081555B2

公开(公告)日：2011-12-20

申请号：US12236653

申请日：2008-09-24

申请人： Takashi Kikukawa

发明人： Takashi Kikukawa

IPC分类号： G11B7/135

CPC分类号： G11B20/10009 ,  G11B20/10055 ,  G11B20/10101 ,  G11B20/1012 ,  G11B20/10481 ,  G11B2220/2537

摘要： A method for evaluating a read signal obtained by irradiating a medium with a laser beam through an objective lens and reading data from the reflected laser beam by a PRML detection method is provided. The method includes: a sampling step of sampling the data obtained from the reflected laser beam at clock timings to obtain sampled values; and a step of, when a constraint length of a PR class in the PRML detection method is an even number, computing an intermediate sampled value for evaluation using at least adjacent two of the sampled values arranged in the order sampled at the clock timings. The provided method is an objective evaluation method when the PRML detection method is used, whereby the selection of a recording medium and a reading apparatus is facilitated.

摘要翻译： 提供了一种用于评估通过用物镜照射激光束的介质并通过PRML检测方法从反射的激光束读取数据而获得的读取信号的方法。 该方法包括：采样步骤，在时钟定时对从反射激光束获得的数据进行采样，以获得采样值; 以及当PRML检测方法中的PR类的约束长度是偶数时，使用在时钟定时采样的顺序中排列的至少相邻的两个采样值来计算用于评估的中间采样值的步骤。 所提供的方法是当使用PRML检测方法时的客观评价方法，由此便于对记录介质和读取装置的选择。

公开(公告)号：US08009548B2

公开(公告)日：2011-08-30

申请号：US12269199

申请日：2008-11-12

申请人： Takashi Kikukawa

发明人： Takashi Kikukawa

IPC分类号： G11B7/24

CPC分类号： G11B7/24038

摘要： An optical recording medium of improved recording and reading characteristics, having both a read-only information recording layer and an information recording layer. The optical recording medium includes information recording layers capable of recording and reading by irradiation of laser light having a wavelength λ of 400 to 410 nm through an optical system having a numerical aperture NA of 0.8 to 0.9. In this medium, the information recording layers include at least a read-only information layer having information recorded in advance and an information recording layer different from the read-only information recording layer, the read-only information recording layer being capable of information recording of write-once type or rewritable type. The read-only information recording layer is stacked closest to a light incident surface of the laser light.

摘要翻译： 具有改善的记录和读取特性的光学记录介质，其具有只读信息记录层和信息记录层。 光记录介质包括能够通过数值孔径NA为0.8至0.9的光学系统通过用波长λ为400至410nm的激光的照射进行记录和读取的信息记录层。 在该介质中，信息记录层至少包括具有预先记录的信息的只读信息层和与只读信息记录层不同的信息记录层，只读信息记录层能够进行信息记录 一次写入型或可重写型。 只读信息记录层被堆叠成最靠近激光的光入射表面。

公开(公告)号：US20110205870A1

公开(公告)日：2011-08-25

申请号：US13032242

申请日：2011-02-22

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

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

IPC分类号： G11B7/24 ,  G11B7/00

CPC分类号： G11B7/24079 ,  G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： An optical recording medium including recording and reading layers and a servo layer increases the recording capacity thereof. In the optical recording medium including the plurality of recording and reading layers and the servo layer, the servo layer has a groove and a land that can be used to perform tracking control with a long-wavelength servo beam. Information is recorded on the recording and reading layers with a recording and reading beam having a wavelength shorter than the wavelength of the servo beam. Recording marks are formed on the recording and reading layers while both the groove and land are tracked.

摘要翻译： 包括记录和读取层和伺服层的光学记录介质增加其记录容量。 在包括多个记录和读取层和伺服层的光学记录介质中，伺服层具有可用于利用长波长伺服光束执行跟踪控制的凹槽和平台。 信息被记录在具有比伺服光束的波长短的波长的记录和读取光束的记录和读取层上。 在记录和读取层上形成记录标记，同时跟踪凹槽和平台。

公开(公告)号：US20110205868A1

公开(公告)日：2011-08-25

申请号：US13032203

申请日：2011-02-22

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

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

IPC分类号： G11B7/24 ,  G11B7/09

CPC分类号： G11B7/0938 ,  G11B7/24038 ,  G11B7/24079 ,  G11B7/24082 ,  G11B2007/0013

摘要： Efficient recording and reading are achieved in an optical recording medium including servo layers and recording and reading layers. The optical recording medium includes: a first servo layer having a projection and a depression for tracking control that are formed in a first spiral direction; a second servo layer having a projection and a depression for tracking control that are formed in a second spiral direction opposite to the first spiral direction; and a plurality of recording and reading layers having a flat structure with no projection and depression for tracking control. Information is recorded on each of the plurality of recording and reading layers while tracking control is performed using the first servo layer or the second servo layer.

摘要翻译： 在包括伺服层和记录和读取层的光学记录介质中实现有效的记录和读取。 光记录介质包括：第一伺服层，具有在第一螺旋方向上形成的用于跟踪控制的突起和凹陷; 具有与第一螺旋方向相反的第二螺旋方向形成的用于跟踪控制的突起和凹陷的第二伺服层; 以及具有平坦结构的多个记录和读取层，没有用于跟踪控制的突出和凹陷。 当使用第一伺服层或第二伺服层执行跟踪控制时，信息被记录在多个记录和读取层中的每一个上。