-
公开(公告)号：AT431256T
公开(公告)日：2009-05-15
申请号：AT02705406
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
-
公开(公告)号：MY128618A
公开(公告)日：2007-02-28
申请号：MYPI20000447
申请日：2000-02-09
Applicant: SONY CORP
Inventor： YASUDA KOICHI , KUROKAWA KOTARO
Abstract: A MULTI-LAYERED OPTICAL DISC HAVING ITS RECORDING UNIT COMPRISED OF PLURAL INFORMATION RECORDING LAYERS, IN WHICH TWO OR MORE INFORMATION RECORDING LAYERS ARE LAYERED ON A SUBSTRATE 0.3 TO 1.2 MM IN THICKNESS, WITH THE INTERPOSITION OF A TRANSPARENT LAYER, TO FORM A RECORDING UNIT, A LIGHT TRANSMITTING PROTECTIVE LAYER IS FORMED ON THE RECORDING UNIT TO A THICKNESS OF 10 TO 177 µM, 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 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 KA1 IN THE AMORPHOUS STATE OF THE PHASE CHANGE MATERIAL CONSISTING THE FIRST INFORMATION RECORDING LAYER AS COUNTED FROM THE LIGHT TRANSMITTING PROTECTIVE LAYER SATISFY THE RELATIONSHIP OF (NC1/NA1)
-
公开(公告)号：JP2011198410A
公开(公告)日：2011-10-06
申请号：JP2010063998
申请日：2010-03-19
Inventor： SAKAMOTO TETSUHIRO , MIYAMOTO HIROTAKA , NAKANO ATSUSHI , YASUDA KOICHI
IPC: G11B7/24
CPC classification number: G11B7/24038
Abstract: PROBLEM TO BE SOLVED: To prevent multiple beam interference which is a practical problem caused by stray light, in relation to a multilayer optical recording medium having N (N≥5) boundary surfaces at which incident light can be reflected.SOLUTION: Each of M boundary surfaces selected from N boundary surfaces (M≤N) is defined as Li (i=0, 1, ..., M, wherein an interface having a smaller value i is formed at a lower layer position farther away from the uppermost surface which is a light-incident surface), and when j
Abstract translation: 要解决的问题：为了防止由杂散光引起的实际问题的多束干涉，相对于具有可以反射入射光的N（N≥5）个边界面的多层光学记录介质。解决方案：M 从N个边界面（M≤N）中选择的边界面被定义为Li（i = 0,1，...，M），其中具有较小值i的界面形成在离最上表面较远的较低层位置 其为光入射面），并且当j
-
14.发明专利Optical recording medium and method of manufacturing the same, and target for sputtering and method of manufacturing the same 有权光学记录介质及其制造方法，以及用于喷射的目标及其制造方法
公开(公告)号：JP2009269224A
公开(公告)日：2009-11-19
申请号：JP2008119544
申请日：2008-05-01
Inventor： YASUDA KOICHI , TAKAGAWA SHIGEKI
CPC classification number: G11B7/266 , C23C14/06 , C23C14/3414 , G11B7/2433 , G11B7/252 , G11B2007/24306 , G11B2007/24314 , G11B2007/24316 , G11B2007/2432
Abstract: PROBLEM TO BE SOLVED: To provide an optical recording medium which has improved recording sensitivity and high productivity. SOLUTION: The optical recording medium has a substrate 20 in which an uneven shape partitioning a track domain is formed, an optical recording layer 33 formed on the substrate 20, and a light transmission layer 41 formed on the optical recording layer 33. The composition of the optical recording layer is indicated by the chemical formula: (Sb 2 Se 3 ) w Te x O y Pd z (w, x, y, and z are expressed in mole%; 10 (mole%)≤w≤60 (mole%); 0 (mole%) COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：提供具有改善的记录灵敏度和高生产率的光学记录介质。 解决方案：光记录介质具有其中形成分隔轨道域的不均匀形状的基板20，形成在基板20上的光学记录层33和形成在光学记录层33上的光透射层41。 光学记录层的组成由以下化学式表示：（Sb
2 Se 3 ） （w，x，y和z以摩尔％表示; 10（摩尔％）≤w≤60（摩尔％）; 0（摩尔％ 摩尔％） -
公开(公告)号：JP2004071152A
公开(公告)日：2004-03-04
申请号：JP2003347270
申请日：2003-10-06
Inventor： ONO MASUMI , FUKUMOTO ATSUSHI , YASUDA KOICHI
Abstract: PROBLEM TO BE SOLVED: To realize tracking control of a SR disk, by using a simple optical system and to suppress power consumption.
SOLUTION: The optical disk (SR disk) 11 made of a material layer is reproduced, which varies its reflection factor according to the temperature on a transparent substrate provided with phase pits. The reflected light from a laser spot on the recording surface of an optical disk 11 is made incident to a quadripartite detector 20 through PBS15 and a cylindrical lens 18, and information signals are obtained from its output. Moreover, error signals Et, Ef are generated from each photosensor output of the detector 20, and the tracking servo by a push-pull method and the focus servo by a astigmatic method are carried out. This allows a side spot, using a diffraction grating etc. which need not be formed and optical system to be simplified, and allows power consumption to be held low. Moreover, since the reflected light from a main spot is utilized, tracking control can be carried out, when a rear aperture detection (RAD) type SR disk with a low initial reflection factor is reproduced.
COPYRIGHT: (C)2004,JPO-
Patent Agency Ranking
公开(公告)号：JP2001216681A
公开(公告)日：2001-08-10
申请号：JP2000384278
申请日：2000-12-18
Applicant: SONY CORP
Inventor： YASUDA KOICHI , FUKUMOTO ATSUSHI , ONO MASUMI
Abstract: PROBLEM TO BE SOLVED: To perform stable tracking control when an optical disk of super high resolution reproducing system is reproduced. SOLUTION: In the method for reproducing an optical recording medium, a control information recording part SA having at least an information recording part DA capable of recording information and at least a wobble pit WP used in control for reading out information recorded in the information recording part DA is prepared, information recorded in the information recording part DA is read out by a laser beam irradiating the optical recording medium in only the information recording part DA of which a recording layer 3 changed by temperature is provided based on reflected light reflected by the information recording part DA, and tracking control is performed by the laser beam irradiating the optical recording medium based on reflected light reflected by the control information recording part SA.
-
公开(公告)号：JP2000260065A
公开(公告)日：2000-09-22
申请号：JP6100999
申请日：1999-03-09
Applicant: SONY CORP
Inventor： YASUDA KOICHI , KUROKAWA KOTARO
IPC: G11B7/24
Abstract: PROBLEM TO BE SOLVED: To obtain an optical disk for verification that is writable only once by laminating plural information recording layers and optical transmission layers with a specific thickness with a transparent intermediate layer between them on a substrate with a specific thickness where guide grooves with a ruggedness pattern are formed and making an information recording layer being the farthest from a support substrate an information recording layer that is writable only once due to a phase change material film. SOLUTION: Plural information recording layers 3 and 4 with a transparent intermediate layer 5 between them are laminated on a 0.3 to 1.2 mm thick support substrate 2 where guide grooves with a ruggedness pattern are formed, and a 10 to 177 μm thick optical transmission layer 6 is laminated on them. The information recording layer 4 is an information recording layer that is writable only one time due to a phase change material film using phase change material. When the phase change material is applied for the layer 4, sufficient light quantity can be supplied even to the information recoding layer 3 of a lower layer side owing to the setting of an optical characteristic, and also when laser beams are converged on the layer 4, the laser beams can be reflected with sufficient contrast.
-
公开(公告)号：JP2000260060A
公开(公告)日：2000-09-22
申请号：JP6098699
申请日：1999-03-09
Applicant: SONY CORP
Inventor： YASUDA KOICHI , KUROKAWA KOTARO
Abstract: PROBLEM TO BE SOLVED: To make a recording medium rewritable and recordable in a high density by laminating information recording layers consisting of phase transition materials made arranging enhancement films and crystallization acceleration films, forming reflection film only on the information recording layers on the extreme supporting substrate side and selecting the film materials constituting the respective information recording layers. SOLUTION: An optical disk 1 is constituted by laminating the information recording layers 3 and 4 holding an intermediate layer 5 in-between on the supporting substrate 2, then forming a light transparent layer 6 thereon. The information recording layers 3 on the supporting substrate 2 side are formed by laminating reflections 3A to semi- transparent enhancement films 3G successively from the supporting substrate 2 side. The information recording layers 4 are formed to the same structure as the structure of the information recording layers 3 by omitting the reflection films and the antitransparent enhancement films 3G. At this time, the second and first crystallization acceleration layers 3C, 3E are formed by using the materials containing one kind of the nitrides or oxides of any of Si, Ge, Sn, etc. As a result, the non-crystallized regions of the phase transition material films 3D can be easily crystallized even when the linear speed is increased by reducing the diameter of a beam spot.
-
公开(公告)号：JP2000235732A
公开(公告)日：2000-08-29
申请号：JP3508699
申请日：1999-02-12
Applicant: SONY CORP
Inventor： YASUDA KOICHI , KUROKAWA KOTARO
Abstract: PROBLEM TO BE SOLVED: To increase recording density in three-dimensional directions and to ensure a larger capacity. SOLUTION: Two or more information recording layers 4, 6 are laminated on a substrate 2 having 0.3-1.2 mm thickness by way of a transparent layer 5 to form a recording part and the objective multilayered optical disk 1 is obtained. A light transmissive protective layer 7 having 10-177 μm thickness is formed on the recording part and an information signal is recorded and reproduced by irradiation with light from the protective layer side. One of the two or more information recording layers other than the information recording layer formed at a position remotest from the light transmissive protective layer uses a phase change material as a recording material. The refractive index nc1 and extinction coefficient kc1 of the phase change material in the crystalline state and the refractive index na1 and extinction coefficient ka1 of the phase change material in the amorphous state satisfy the relations of (nc1/na1)
-
公开(公告)号：JPH11227334A
公开(公告)日：1999-08-24
申请号：JP3485898
申请日：1998-02-17
Applicant: SONY CORP
Inventor： YASUDA KOICHI
Abstract: PROBLEM TO BE SOLVED: To realize a crosstalk cancellation by controlling an absorptivity by one recording film. SOLUTION: A recording film 3 of the optical recording medium having the film 3 formed on a base plate 1 having a guide groove 2 is formed of a mixture of a metal and a dielectric. When a recording pulse is illuminated to the film 3, the metal is reacted with the dielectric, and hence an oxide is, for example, formed. And, since the oxide has a higher light transmittance than that of the metal, the film 3 is made of the mixture of the metal and the oxide. Thus, the light transmittance, reflectivity of the film can be easily controlled.
-
-
-
-
-
-
-
-
-
Search Results
76
records
(took 0.027 seconds)
