公开(公告)号：US06338911B1

公开(公告)日：2002-01-15

申请号：US09429082

申请日：1999-10-29

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B566

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10593 ,  Y10S428/90

摘要： A reproduction layer, a magnetic domain extending layer, an intermediate layer, and a recording layer are formed in this order. The magnetic domain extending layer, the intermediate layer, and the recording layer are exchange-coupled. The intermediate layer has a Curie temperature lower than that of any other magnetic layer. A non-magnetic intermediate layer is formed between the reproduction layer and the magnetic domain extending layer. Upon reproduction, magnetization information in the recording layer is transferred to and extended in the magnetic domain extending layer, where an extended magnetic domain is formed. The reproduction layer is magnetostatically coupled with the magnetic domain extending layer, so that the extended magnetic domain is transferred to the reproduction layer. This makes it possible to provide a magneto-optical recording medium characterized in moving of magnetic domain walls and extension of magnetic domains in good conditions, and increased signal intensity with a simpler structure.

摘要翻译： 依次形成再生层，磁畴延伸层，中间层和记录层。 磁畴延伸层，中间层和记录层是交换耦合的。 中间层的居里温度低于任何其他磁性层的居里温度。 在再现层和磁畴延伸层之间形成非磁性中间层。 在再现时，记录层中的磁化信息被转移到扩展磁畴的磁畴延伸层中并扩展。 再现层与磁畴延伸层磁静电耦合，从而将扩展磁畴转移到再现层。 这使得可以提供一种磁光记录介质，其特征在于在良好的条件下磁畴壁的移动和磁畴的延伸，并且以更简单的结构增加信号强度。

公开(公告)号：US06128274A

公开(公告)日：2000-10-03

申请号：US188581

申请日：1998-11-09

申请人： Go Mori ,  Michinobu Mieda ,  Naoyasu Iketani ,  Ippei Suzuki ,  Yoshiteru Murakami ,  Akira Takahashi

发明人： Go Mori ,  Michinobu Mieda ,  Naoyasu Iketani ,  Ippei Suzuki ,  Yoshiteru Murakami ,  Akira Takahashi

IPC分类号： G11B7/24 ,  G11B7/241 ,  G11B7/257 ,  G11B11/105

CPC分类号： G11B7/252 ,  G11B7/24056 ,  G11B7/24067 ,  G11B11/10584 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25718 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2578

摘要： An optical disk of the present invention includes a transparent dielectric film formed on a light incident side of the disk on an opposite side of an optical recording film so as to sandwich the transparent substrate therebetween, for suppressing bimetallic effects caused by a difference in thermal expansion between an optical recording film formed on an optical recording surface and the transparent substrate, whereby changes in tilt against temperature changes can be suppressed. Further, by an optimal selection of a reflectance of the transparent dielectric film, unwanted reflection due to multi-interference can be reduced at the same time.

摘要翻译： 本发明的光盘包括形成在光记录膜的相对侧上的光盘入射侧的透明电介质膜，以将透明基板夹在其间，用于抑制由热膨胀差引起的双金属效应 在形成在光学记录表面上的光学记录膜与透明基板之间，由此能够抑制倾斜温度变化的变化。 此外，通过对透明电介质膜的反射率的最佳选择，可以同时减少由于多次干涉引起的不期望的反射。

公开(公告)号：US6031816A

公开(公告)日：2000-02-29

申请号：US330495

申请日：1999-06-11

申请人： Tetsuya Inui ,  Hideaki Sato ,  Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

发明人： Tetsuya Inui ,  Hideaki Sato ,  Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/24 ,  G11B7/26 ,  G11B11/105

CPC分类号： G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582 ,  G11B7/0938 ,  G11B7/24

摘要： An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.

摘要翻译： 光盘具有地址记录部分，每个地址记录部分具有凹槽的一个侧壁的摆动部分。 每个地址记录部分通过在相邻的凸台中提供凹槽的凸起来形成，以便加宽凹槽。 由于以这样提供的摆动形式为凹凸形式，所以记录地址信息。 此外，这样设置在凹槽中的地址记录部分在光盘的径向上线性地设置。 通过这样布置记录有槽和/或焊盘信息的光盘，不会发生重放信息信号中的摆动频率分量的混合，扇区方法可应用于光盘，并且可以获得高质量的信息信号。

公开(公告)号：US5982715A

公开(公告)日：1999-11-09

申请号：US116328

申请日：1998-07-15

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Ippei Suzuki ,  Junji Hirokane ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Ippei Suzuki ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10584 ,  G11B11/10593 ,  G11B11/10515

摘要： A magneto-optical recording medium with a reproducing layer that exhibits in-plane magnetization at room temperature and that comes to exhibit perpendicular magnetization as temperature rises. The second shielding layer is used to block the magnetization of record bits other than a record bit to be reproduced from being copied on a signal reproducing area in the reproducing layer. Consequently, even in the case of high-density record bits in the recording layer, only the magnetization of the record bit to be reproduced is copied on the reproducing layer. Therefore, the application of the magneto-optical recording medium makes it possible to produce superior reproducing signals even in the case where the records bits with high density are formed on the recording layer.

摘要翻译： 一种具有再现层的磁光记录介质，其在室温下表现出平面内的磁化，并且随着温度升高而呈现垂直磁化强度。 第二屏蔽层用于阻止除被再现的记录位之外的记录位的磁化被复制在再现层中的信号再现区上。 因此，即使在记录层中的高密度记录位的情况下，只有将再现的记录位的磁化复制在再现层上。 因此，即使在记录层上形成具有高密度的记录位的情况下，也可以应用磁光记录介质来产生优良的再现信号。

公开(公告)号：US5901118A

公开(公告)日：1999-05-04

申请号：US803168

申请日：1997-02-19

申请人： Naoyasu Iketani ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

发明人： Naoyasu Iketani ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10586 ,  G11B11/10584 ,  G11B11/10515

摘要： A magneto-optical recording medium having a substrate whereupon a transparent dielectric layer, a readout layer showing in-plane magnetization at room temperature and perpendicular magnetization with an increase in temperature, a metal film layer, a recording layer made of a perpendicularly magnetized film, and a protective layer are formed in this order, wherein the film thickness of the readout layer is between 5 nm and 30 nm, the film thickness of the metal film layer is between 6 nm and 40 nm, and the film thickness of the recording layer is between 20 nm and 80 nm. Since recording domain information at a portion showing in-plane magnetization is masked, even when adjacent recording bit enters into the beam diameter of a light beam focused, it is possible to separately reproduce individual recording bits with high signal quality.

摘要翻译： 具有基板的磁光记录介质，其中透明介电层，在室温下显示出面内磁化的读出层和随温度升高的垂直磁化，金属膜层，垂直磁化膜制成的记录层， 并且依次形成保护层，其中读出层的膜厚度在5nm和30nm之间，金属膜层的膜厚度在6nm和40nm之间，记录层的膜厚度 在20nm和80nm之间。 由于在显示面内磁化的部分记录域信息被掩蔽，所以即使当相邻的记录位进入聚焦的光束的光束直径时，也可以分离再现具有高信号质量的各个记录位。

公开(公告)号：US5643687A

公开(公告)日：1997-07-01

申请号：US358682

申请日：1994-12-19

申请人： Naoyasu Iketani ,  Hiroyuki Katayama ,  Junichiro Nakayama ,  Kenji Ohta

发明人： Naoyasu Iketani ,  Hiroyuki Katayama ,  Junichiro Nakayama ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B7/257 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B7/2578 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10593 ,  G11B7/252 ,  G11B2007/24306 ,  G11B2007/25706 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25718 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2585 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optic memory medium including a first dielectric layer having a first main surface and a second main surface; a second dielectric layer for covering the first main surface of the first dielectric layer; and a magneto-optic memory layer for covering the second dielectric layer. The first dielectric layer is formed of an oxide having a refractive index in the range of 2.4 or more and 3.5 or less, and the second dielectric layer is formed of a material containing no oxygen. The magneto-optic memory medium is produced by the steps of forming a first layer by performing reactive sputtering in an atmosphere of a first sputter gas using a material containing a first element as a target; switching the first sputter gas to a second sputter gas; forming a second layer on the first layer by performing reactive sputtering in an atmosphere of the second sputter gas using a material containing the first element as a target; and forming a magneto-optic memory layer on the second dielectric layer.

摘要翻译： 一种磁光存储介质，包括具有第一主表面和第二主表面的第一介电层; 第二电介质层，用于覆盖第一介电层的第一主表面; 以及用于覆盖第二介电层的磁光存储层。 第一电介质层由折射率在2.4以上且3.5以下的氧化物形成，第二电介质层由不含氧的材料形成。 磁光存储介质通过以下步骤制造：通过使用包含第一元素作为靶的材料在第一溅射气体的气氛中进行反应溅射来形成第一层; 将第一溅射气体切换到第二溅射气体; 通过使用包含第一元素作为目标的材料在第二溅射气体的气氛中进行反应溅射，在第一层上形成第二层; 以及在所述第二电介质层上形成磁光存储层。

公开(公告)号：US5486395A

公开(公告)日：1996-01-23

申请号：US984350

申请日：1992-12-02

申请人： Yoshiteru Murakami ,  Naoyasu Iketani ,  Akira Takahashi ,  Kenji Ohta

发明人： Yoshiteru Murakami ,  Naoyasu Iketani ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  B32B3/02 ,  G11B5/66

CPC分类号： G11B11/10504 ,  G11B11/10515 ,  G11B11/10582 ,  G11B11/10586 ,  Y10S428/90

摘要： A magneto optical disk comprising: a circular substrate; a recording layer, formed on the substrate, for magneto-optical recording of information; a readout layer, formed between the substrate and the recording layer, for the reproduction of information recorded on the recording layer, wherein the readout layer has a Curie temperature which is higher than the Curie temperature of the recording layer, and exhibits in-plane magnetization at room temperature and a change from in-plane magnetization to perpendicular magnetization when its temperature rises over a certain temperature as a result of the application of a light beam, and wherein the magnetic compensation temperature is set such that it increases from the peripheral edge of the magneto-optical disk toward the center thereof. When the magneto-optical disk is used with a magneto-optical recording and reproducing device using a CAV system, it achieves high-density recording and the reproduction of signals with reduced noise, without causing the light beam control system to be complicated.

摘要翻译： 一种磁光盘，包括：圆形衬底; 记录层，形成在基板上，用于磁光记录信息; 形成在基板和记录层之间的用于再现记录在记录层上的信息的读出层，其中读出层的居里温度高于记录层的居里温度，并且表现出面内磁化 在室温下由于施加光束而在其温度上升超过一定温度时从面内磁化变化到垂直磁化的变化，并且其中磁补偿温度被设定为使得其从外周边缘 磁光盘朝向其中心。 当磁光盘与使用CAV系统的磁光记录和再现装置一起使用时，可以实现高密度记录和降低噪声的信号的再现，而不会使光束控制系统复杂化。

公开(公告)号：US20120292635A1

公开(公告)日：2012-11-22

申请号：US13574993

申请日：2010-12-28

申请人： Naoyasu Iketani ,  Tomohiro Nozawa ,  Yoshiaki Nozaki ,  John K. Twynam ,  Hiroshi Kawamura ,  Keiichi Sakuno

发明人： Naoyasu Iketani ,  Tomohiro Nozawa ,  Yoshiaki Nozaki ,  John K. Twynam ,  Hiroshi Kawamura ,  Keiichi Sakuno

IPC分类号： H01L29/20

CPC分类号： H01L27/0605 ,  H01L27/0629

摘要： This composite semiconductor device has a normally-on first field effect transistor and a normally-off second field effect transistor connected in series between first and second terminals, gates of the first and second field effect transistors being connected to second and third terminals, respectively, and N diodes being connected in series in a forward direction between a drain and a source of the second field effect transistor. Therefore, a drain-source voltage (Vds) of the second field effect transistor can be restricted to a voltage not higher than a withstand voltage of the second field effect transistor.

摘要翻译： 该复合半导体器件具有在第一和第二端子之间串联连接的常开第一场效应晶体管和常关第二场效应晶体管，第一和第二场效应晶体管的栅极分别连接到第二和第三端子， 并且N个二极管在第二场效应晶体管的漏极和源极之间沿正向串联连接。 因此，第二场效应晶体管的漏极 - 源极电压（Vds）可以被限制在不高于第二场效应晶体管的耐受电压的电压。

公开(公告)号：US06477120B1

公开(公告)日：2002-11-05

申请号：US09451260

申请日：1999-11-30

申请人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Akira Takahashi

发明人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B1100

CPC分类号： G11B11/10586 ,  G11B11/10515 ,  G11B11/10584

摘要： In order to provide a magneto-optical recording medium which can select a single recording magnetic domain in the recording layer accurately and expand and transfer the same to the reproducing layer, the magneto-optical recording medium is arranged in the following manner. That is, the magnetization direction of the reproducing layer is in-plane at room temperature and shifts to perpendicular at or above a predetermined temperature Ttrans.. The recording layer is a magnetic layer which is magneto-statically coupled to the reproducing layer and shows the perpendicular magnetization up to its Curie temperature. The magnetic mask layer is provided between the recording layer and reproducing layer, and the magnetization thereof is reduced to 0 (zero) at or above a predetermined temperature (Tm) which is at or above Ttrans.. The magnetization of the magnetic mask layer is larger than that of the recording layer at least in a range between room temperature and Ttrans..

摘要翻译： 为了提供可以精确地选择记录层中的单个记录磁畴并将其扩展并传送到再现层的磁光记录介质，磁光记录介质以如下方式布置。 也就是说，再现层的磁化方向在室温下处于平面，并在预定温度T trans以上移动到垂直方向。记录层是磁性层，磁性层与再现层磁耦合，并显示出 垂直磁化强度达其居里温度。 磁记录层设置在记录层和再现层之间，其磁化强度在等于或高于Ttrans的预定温度（Tm）以上或者高于Ttrans的0（零）。磁屏蔽层的磁化强度为 大于记录层的至少在室温和Ttrans之间的范围内。

公开(公告)号：US06388956B1

公开(公告)日：2002-05-14

申请号：US09440929

申请日：1999-11-16

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B1100

CPC分类号： G11B11/10593 ,  G11B11/10584

摘要： A magneto-optical storage medium includes an interference layer, a magnetic domain expansion layer, an intermediate layer, a magnetic masking layer, a recording layer, and a protection layer which are sequentially formed on a substrate. The magnetic domain expansion layer produces a smaller frictional force due to wall coercivity than do the other magnetic layers. The intermediate layer has the Curie temperature TC2 which is lower than those of the other magnetic layers. The magnetic masking layer is in a perpendicular magnetization state at temperatures that are in a proximity of TC2, and changes into an in-plane magnetization state at temperatures that are higher than the proximity of TC2. The recording layer produces a higher coercive force than those produced by the magnetic domain expansion layer at room temperature.