公开(公告)号：US07197005B2

公开(公告)日：2007-03-27

申请号：US09971704

申请日：2001-10-09

申请人： Tatsuya Kato ,  Hideki Hirata ,  Hajime Utsunomiya ,  Hiroyasu Inoue

发明人： Tatsuya Kato ,  Hideki Hirata ,  Hajime Utsunomiya ,  Hiroyasu Inoue

IPC分类号： G11B7/24

CPC分类号： G11B7/24079 ,  G11B7/00454 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/243 ,  G11B7/256 ,  G11B7/2578 ,  G11B7/258 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316

摘要： In an optical recording medium including a grooved light-transparent substrate, a phase change recording layer, a dielectric layer and a reflective layer, recording is carried out by irradiating a laser beam to the recording layer through an objective lens in an optical system. The recording is carried out in a groove recording mode under the conditions: 0.48≦PT/(λ/NA)≦0.74, and PT≦0.50 μm wherein λ is a laser beam wavelength, NA is an objective lens numerical aperture, and PT is a track pitch, thereby forming a recorded mark having opposite ends extending out of the groove. This enables high density recording and increases the data transfer rate of a phase change optical recording medium.

摘要翻译： 在包括带槽的光透明基板，相变记录层，电介质层和反射层的光记录介质中，通过光学系统中的物镜将激光束照射到记录层来进行记录。 在凹槽记录模式下，在0.48≤P /（λ/ NA）<= 0.74和P <=0.50μm的条件下进行记录 其中λ是激光束波长，NA是物镜数值孔径，并且P T T是轨道间距，从而形成具有相对端延伸出凹槽的记录标记。 这使得能够进行高密度记录并增加相变光学记录介质的数据传送速率。

公开(公告)号：US06665260B2

公开(公告)日：2003-12-16

申请号：US09899152

申请日：2001-07-06

申请人： Tatsuya Kato ,  Hajime Utsunomiya ,  Hiroyasu Inoue ,  Hideki Hirata

发明人： Tatsuya Kato ,  Hajime Utsunomiya ,  Hiroyasu Inoue ,  Hideki Hirata

IPC分类号： G11B724

CPC分类号： G11B7/24085 ,  G11B7/00745 ,  G11B7/261

摘要： In an optical recording medium wherein grooves or lands formed on the supporting substrate are used for the recording tracks, and wherein prepits are also formed, production of the supporting substrate and high density recording are facilitated. This medium comprises a supporting substrate and a recording layer on the substrate wherein the surface of the supporting substrate on which the recording layer is formed is formed with alternating continuous convex portions and continuous concave portions which are substantially parallel to each other. The adjacent continuous convex portions are connected by bridging convex portions extending in transverse direction, and the bridging convex portion has a planar configuration that its width is minimum at or near the center between the adjacent continuous convex portions. The supporting substrate is produced by using a master disk which has a resist layer formed with mother patterns of each of the continuous convex portions, continuous concave portions, and prepits. In the production of the master disk, the resist layer is intermittently irradiated with one exposure beam, and the area irradiated is used as the mother pattern of the continuous concave portions or convex portions, and the area which was not irradiated is used as the mother pattern of the prepits.

摘要翻译： 在其中形成在支撑基板上的槽或焊盘用于记录轨道的光记录介质中，并且还形成预凹坑，便于生产支撑基板和高密度记录。 该介质包括支撑衬底和衬底上的记录层，其中形成有记录层的支撑衬底的表面形成有彼此基本平行的交替的连续凸部和连续凹部。 相邻的连续凸部通过在横向延伸的桥接凸部连接，并且桥接凸部具有在相邻的连续凸部之间的中心处或其附近的宽度最小的平面构造。 支撑基板通过使用具有形成有连续凸部，连续凹部和预凹坑中的每一个的母体图案的抗蚀剂层的母盘来制造。 在母盘的制造中，用一个曝光束间歇地照射抗蚀剂层，照射的面积用作连续凹部或凸部的母体图案，未照射的区域用作母体 预制图案。

公开(公告)号：US6115351A

公开(公告)日：2000-09-05

申请号：US221125

申请日：1998-12-28

申请人： Hajime Utsunomiya ,  Tatsuya Kato ,  Hiroyasu Inoue

发明人： Hajime Utsunomiya ,  Tatsuya Kato ,  Hiroyasu Inoue

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/24 ,  G11B7/254 ,  G11B7/257 ,  G11B7/26

CPC分类号： G11B7/2578 ,  G11B7/006 ,  G11B7/24 ,  G11B7/26 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/25706 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25716 ,  G11B2007/25718 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/256 ,  G11B7/2585 ,  G11B7/2595

摘要： Prevented is the reliability loss in phase change optical recording media during high-temperature storage, and also prevented is the phenomenon of self-erase by which a part of record marks having been formed in the media are erased due to the lateral heat diffusion into the recording layer while recording laser beams are irradiated to the media. The optical recording medium disclosed has a recording layer of a phase change type and is applied to driving units for overwriting it at a linear velocity of V.sub.0. The medium is so designed as to satisfy the requirement of 1

摘要翻译： 防止在高温存储期间相变光学记录介质中的可靠性损失，并且还防止了由于横向热扩散到介质中而在介质中形成的记录标记的一部分被擦除的自擦除现象 记录激光束的记录层被照射到介质上。 所公开的光记录介质具有相变型的记录层，并被施加到用于以V 0的线速度重写的驱动单元。 该介质被设计成满足1

公开(公告)号：US6096400A

公开(公告)日：2000-08-01

申请号：US220344

申请日：1998-12-24

申请人： Hiroyasu Inoue ,  Tatsuya Kato ,  Hajime Utsunomiya

发明人： Hiroyasu Inoue ,  Tatsuya Kato ,  Hajime Utsunomiya

IPC分类号： G11B7/0045 ,  G11B7/007 ,  G11B7/24 ,  B32B3/02

CPC分类号： G11B7/24079 ,  G11B7/00718 ,  G11B7/24 ,  G11B7/00454 ,  Y10T428/21

摘要： In a phase change-type optical recording medium of absorption coefficient control structure used by land/groove recording system, difference in reproduction characteristics between the land and the groove is minimized while ensuring sufficient output of the tracking signal. In the optical recording medium of the present invention, light absorption coefficient at the wavelength of said recording/reproducing beam is such that: Ac/Aa.gtoreq.0.8 when light absorption coefficient in crystalline region is Ac and light absorption coefficient in amorphous region is Aa; relation between groove width W.sub.G and land width W.sub.L is such that: x=2W.sub.G /(W.sub.L +W.sub.G).gtoreq.1.03; and the relation: .lambda.max.sup.i

摘要翻译： 在由槽脊/沟槽记录系统使用的吸收系数控制结构的相变型光学记录介质中，在确保足够的跟踪信号的输出的同时，使焊盘和凹槽之间的再现特性差异最小化。 在本发明的光记录介质中，所述记录/再现光束的波长处的光吸收系数使得当结晶区域的光吸收系数为Ac时的Ac / Aa> / = 0.8，非晶区域的光吸收系数为 阿 槽宽度WG和焊盘宽度WL之间的关系使得：x = 2WG /（WL + WG）> / = 1.03; 当反射光谱中的局部最小值的波长为λ迷你时，满足λmaxi <λu

公开(公告)号：US20080239934A1

公开(公告)日：2008-10-02

申请号：US12076070

申请日：2008-03-13

申请人： Hiroshi Shingai ,  Tatsuya Kato ,  Masanori Kosuda ,  Hiroshi Takasaki ,  Hideki Hirata ,  Hajime Utsunomiya

发明人： Hiroshi Shingai ,  Tatsuya Kato ,  Masanori Kosuda ,  Hiroshi Takasaki ,  Hideki Hirata ,  Hajime Utsunomiya

IPC分类号： G11B7/24

CPC分类号： G11B7/2433 ,  G11B7/24038 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/25706 ,  G11B2007/25715 ,  Y10T428/21

摘要： An optical recording medium is provided which includes two or more information layers in which an Sb-based eutectic material is used as the material for a recording film of a translucent information layer. There is also provided a recording film material for the optical recording medium. The translucent information layer is configured to include a recording film formed of a phase change material SbxGeyInz containing Sb, Ge, and In in an atomic ratio of x:y:z, where 5≦y≦15 and 4≦z≦15 are satisfied. The recording film further includes Te in an atomic ratio of a, provided that x+y+z+a=100 and 4≦a≦15 are satisfied. An interface layer formed of a ZrO2—Cr2O3 film having a thickness of 2 nm or more and 10 nm or less is provided on the laser beam incident side of the recording film. When the compositional ratio of the ZrO2—Cr2O3 film is given by ZrO2:Cr2O3=B:C (mol %), 20≦B≦90, 10≦C≦80, and B+C=100 are satisfied.

摘要翻译： 提供了一种光记录介质，其包括其中使用Sb基共晶材料作为半透明信息层的记录膜的材料的两个或更多个信息层。 还提供了一种用于光学记录介质的记录膜材料。 半透明信息层被配置为包括由包含Sb，Ge和Sb的相变材料Sb x Sub x Z z形成的记录膜;以及 在x：y：z的原子比中，其中5 <= y <= 15且4 <= z <= 15。 如果满足x + y + z + a = 100和4 <= a <= 15，则记录膜还包括原子比a的Te。 提供由厚度为2nm以上且10nm以下的ZrO 2·2L 2 O 3·3膜形成的界面层 在记录膜的激光束入射侧。 当ZrO 2→2→2→3 <3>膜的组成比由ZrO 2：Cr： B = C（摩尔％），20 <= B <= 90，10 <= C <= 80，B + C = 100。

公开(公告)号：US20080175125A1

公开(公告)日：2008-07-24

申请号：US12010163

申请日：2008-01-22

申请人： Hiroshi Shingai ,  Tatsuya Kato ,  Masanori Kosuda ,  Hiroshi Takasaki ,  Hideki Hirata ,  Hajime Utsunomiya

发明人： Hiroshi Shingai ,  Tatsuya Kato ,  Masanori Kosuda ,  Hiroshi Takasaki ,  Hideki Hirata ,  Hajime Utsunomiya

IPC分类号： G11B3/74

CPC分类号： G11B7/24038 ,  G11B7/2433 ,  G11B7/2578 ,  G11B7/259 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/25706 ,  G11B2007/25715 ,  Y10T428/21

摘要： A next-generation optical recording medium has two or more information layers which include a translucent information layer. The translucent information layer has a recording film and an interface layer, provided adjacent to the recording film on the side of the light incident surface. The recording film is made of a phase change material having SbxTeyGez elements and elemental ratios. Y satisfies 5≦y≦15 and z satisfies 5≦z≦15. When In having an elemental ratio of a is further added and x+y+z+a=100 holds, a satisfies 4≦a≦15. The interface layer comprises of ZrO2—Cr2O3 film thickness of which is in a range of from 2 nm to 10 nm. When ZrO2:Cr2O3═C:D (mol %), the compositional ratios ZrO2 and Cr2O3 in the ZrO2—Cr2O3 film, holds, the C satisfies 20≦C≦90, and the D satisfies 10≦D≦80, and the C and the D satisfy C+D=100. The ZrO2 is stabilized ZrO2 which contains Y2O3, when ZrO2:Y2O3=(100-X):X (mol %), the compositional ratios ZrO2 and Y2O3 in the stabilized ZrO2, holds, the X satisfies 2≦X≦10.

摘要翻译： 下一代光记录介质具有包括半透明信息层的两个或多个信息层。 半透明信息层具有记录膜和界面层，与光入射表面侧的记录膜相邻。 该记录膜由具有Sb x Si x Y y z z z元素和元素比的相变材料制成。 Y满足5 <= y <= 15，z满足5 <= z <= 15。 当进一步添加具有a的元素比率的In并且x + y + z + a = 100成立时，满足4 <= a <= 15。 界面层包含ZrO 2→2→2→3→3→3膜，其膜厚在2nm至10nm的范围内。 当ZrO 2：Cr 2 O 3 -C（D）（摩尔％）时，组成比ZrO 2 < 和ZrO 2 -r 2 O 3 O 3膜中的Cr 2 O 3 O 3 满足20 <= C <= 90，D满足10 <= D <= 80，C和D满足C + D = 100。 当ZrO 2 2时，ZrO 2 2是稳定的含有Y 2 O 3 O 3的ZrO 2 （100-X）：X（摩尔％），组成比ZrO 2和Y _{2 3 <3>，X满足2 <= X <= 10。}

公开(公告)号：US06605328B2

公开(公告)日：2003-08-12

申请号：US09886258

申请日：2001-06-22

申请人： Hiroshi Shingai ,  Hiroyasu Inoue ,  Tatsuya Kato ,  Hajime Utsunomiya ,  Yoshitomo Tanaka

发明人： Hiroshi Shingai ,  Hiroyasu Inoue ,  Tatsuya Kato ,  Hajime Utsunomiya ,  Yoshitomo Tanaka

IPC分类号： B32B302

CPC分类号： G11B7/2433 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/256 ,  G11B7/2578 ,  G11B7/259 ,  G11B2007/24306 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25716 ,  Y10T428/21

摘要： In an optical recording medium comprising a phase change recording layer (4) containing Sb and optionally, Te and/or In as a main component, the recording layer is able to be crystallized to provide a crystallized region which contains rhombohedral crystals consisting essentially of Sb and is substantially free of a crystal phase other than the rhombohedral crystals. When the recording layer contains a rare earth element, Zr, Hf, Ti or Sn as an auxiliary component, the medium has a dielectric layer (31) composed of silicon oxide, silicon nitride, aluminum oxide, or a mixture of zinc sulfide and at least 30 mol % of silicon oxide, disposed contiguous to and in front of the recording layer (4) as viewed from the recording/reading beam incident side. The medium has a high transfer rate and improved thermal stability.

公开(公告)号：US6040030A

公开(公告)日：2000-03-21

申请号：US153294

申请日：1998-09-15

申请人： Hajime Utsunomiya ,  Tatsuya Kato ,  Hiroyasu Inoue

发明人： Hajime Utsunomiya ,  Tatsuya Kato ,  Hiroyasu Inoue

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/007 ,  G11B7/125 ,  G11B7/30 ,  B32B3/00

CPC分类号： G11B7/006 ,  G11B7/00718 ,  G11B7/00454 ,  G11B7/00557 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

摘要： A method for recording/reproducing an optical recording medium of phase change type is provided. The method enables a high density recording while increase in the cross erase is suppressed. The method also enables an accurate tracking while increase in the crosstalk is suppressed. The method is adapted for use with an optical recording medium of phase change type comprising a substrate having a thickness of up to 0.8 mm wherein lands and grooves on opposite sides of the land are formed on the surface, and both the lands and the grooves are used as recording tracks, and the medium is overwritten at a recording power Pw (mW) and an erasing power Pe (mW) which meet the relation: (Pw/Pe).times.k.sup.2 .ltoreq.8.5, when the medium has a recording track pitch P (.mu.m), the recording/reproducing optical system has a numerical aperture NA, and the recording/reproducing light has a wavelength .lambda. (.mu.m) which meet the relation: k=(.lambda./NA)/P.gtoreq.1.78.

摘要翻译： 提供了一种用于记录/再现相变型光记录介质的方法。 该方法能够进行高密度记录，同时抑制交叉擦除的增加。 该方法还能够进行精确的跟踪，同时抑制串扰的增加。 该方法适用于包括厚度高达0.8mm的基板的相变型光记录介质，其中在该表面上形成有焊盘相对两侧的焊盘和凹槽，并且焊盘和凹槽均为 用作记录轨道，并且当介质具有记录轨道间距时，记录功率Pw（mW）和满足关系式（Pw / Pe）xk2 <8.5的擦除功率Pe（mW）被覆盖介质 P（μm），记录/再现光学系统具有数值孔径NA，并且记录/再现光具有满足以下关系的波长λ（μm）：k =（λ/NA)/P>/=1.78 。

公开(公告)号：US06618349B2

公开(公告)日：2003-09-09

申请号：US09788589

申请日：2001-02-21

申请人： Hiroyasu Inoue ,  Hajime Utsunomiya ,  Hiroshi Shingai ,  Tetsuro Mizushima ,  Tatsuya Kato

发明人： Hiroyasu Inoue ,  Hajime Utsunomiya ,  Hiroshi Shingai ,  Tetsuro Mizushima ,  Tatsuya Kato

IPC分类号： G11B700

CPC分类号： G11B7/007

摘要： In an optical recording medium of land/groove recording system, a sufficient tilt margin and a reduced cross talk are realized simultaneously with a sufficiently increased output. Provided is an optical recording medium having a light-transmitting substrate formed with grooves wherein the grooves and the region between adjacent grooves are used for the recording track, and a reading beam is irradiated through the light-transmitting substrate, wherein the relations: −12.6T+15.6≦x≦25T−3.8, and 0.55≦T≦0.68 are satisfied when the reading beam has a wavelength of &lgr;, the light-transmitting substrate has a refractive index at the wavelength &lgr; of n, the reading optical system has a numerical aperture of NA, recording track pitch is PT, the groove has a depth of &lgr;/(x·n), and T is PT/(&lgr;/NA).

摘要翻译： 在平台/凹槽记录系统的光记录介质中，充分提高输出同时实现足够的倾斜余量和减少的串扰。 提供了一种光记录介质，其具有形成有沟槽的光透射基板，其中沟槽和相邻凹槽之间的区域用于记录轨道，并且通过透光基板照射读取光束，其中满足关系： 当读取光束具有lambd的波长时，透光衬底的折射率为n的波长，读取光学系统具有NA的数值孔径，记录轨道间距为PT，槽具有lambd的深度 /（xn），T为PT /（lambd / NA）。

公开(公告)号：US6087067A

公开(公告)日：2000-07-11

申请号：US55873

申请日：1998-04-07

申请人： Tatsuya Kato ,  Hajime Utsunomiya ,  Tsuyoshi Komaki ,  Hideki Hirata

发明人： Tatsuya Kato ,  Hajime Utsunomiya ,  Tsuyoshi Komaki ,  Hideki Hirata

IPC分类号： G11B7/24 ,  G11B7/254 ,  G11B7/257

CPC分类号： G11B7/257 ,  G11B7/24 ,  G11B7/2542 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/25706 ,  G11B2007/2571 ,  G11B2007/25715 ,  G11B2007/25716 ,  G11B7/252 ,  G11B7/2534 ,  G11B7/256 ,  Y10S430/146

摘要： An optical recording medium of phase change type, and in particular, a dual side medium prepared by adhering two single side media is provided. In this medium, deformation of record marks generated in the overwriting due to difference in light absorption between the record marks and the region other than the record marks is prevented by providing a reflective layer of high light transmission, and increase in jitter and failure of track servo and focus servo caused by uneven coating of the adhesive layer and the resin protective layer are prevented. The optical recording medium comprises a substrate, a recording layer of phase change type on the surface side of the substrate, and a reflective layer and a light absorption layer disposed in this order on the surface side of the recording layer. The light absorption layer has a light transmission of 85% or higher in wavelength range S (wavelength in the range of 400 to 450 nm), up to 55% at the recording/reproducing wavelength, and 80% or higher in wavelength range L (wavelength in the range of 800 to 830 nm).

摘要翻译： 提供了相变型的光记录介质，特别是提供了通过粘附两个单面介质制备的双面介质。 在该介质中，由于记录标记与记录标记之外的区域之间的光吸收差异而在重写中产生的记录标记的变形通过提供高光传输的反射层而被防止，并且增加了轨迹的抖动和故障 防止了粘合剂层和树脂保护层的不均匀涂覆引起的伺服和聚焦伺服。 光记录介质包括基板，基板的表面侧的相变型记录层，以及依次设置在记录层的表面侧的反射层和光吸收层。 光吸收层的波长范围S（波长在400〜450nm）的光透射率高达85％以上，记录/再生波长为55％以下，波长范围为80％以上 波长在800至830nm的范围内）。