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1. 发明授权

US5554436A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5554436A
公开(公告)日：1996-09-10
申请号：US341310
申请日：1994-11-16
申请人： Hiroyuki Katayama , Junichiro Nakayama , Naoyasu Iketani , Kenji Ohta
发明人： Hiroyuki Katayama , Junichiro Nakayama , Naoyasu Iketani , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10586 , Y10S428/90 , Y10S430/146 , Y10T428/12632 , Y10T428/12861 , Y10T428/12986 , Y10T428/24942 , Y10T428/31678
摘要： A magneto-optical recording medium is composed of first through fourth magnetic layers laminated in this order in such a way that an exchange coupling exists between any adjacent layers of the first through fourth magnetic layers so that a magnetization direction can be copied, wherein the first magnetic layer is a memory layer, the second magnetic layer is a writing layer, the third magnetic layer is a switching layer, and the fourth magnetic layer is an initializing layer. Further, respective Curie temperatures Tci satisfy an inequation Tc.sub.3
摘要翻译：磁光记录介质由依次层叠的第一至第四磁性层组成，使得在第一至第四磁性层的任何相邻层之间存在交换耦合，使得可以复制磁化方向，其中第一磁性层是存储层，第二磁性层是写入层，第三磁性层是开关层，第四磁性层是初始化层。此外，各居里温度Tci满足不等式Tc3

2. 发明授权

US5643687A Magneto-optic memory medium and a method for producing the same 失效
标题翻译：磁光存储介质及其制造方法
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。

3. 发明授权

US5637394A Magneto-optical recording medium and method of reproducing magneto-optical information using thereof 失效
标题翻译：磁光记录介质及其再现磁光信息的方法
公开(公告)号：US5637394A
公开(公告)日：1997-06-10
申请号：US356857
申请日：1994-12-15
申请人： Junsaku Nakajima , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Kenji Ohta
发明人： Junsaku Nakajima , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10584 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium comprising a readout layer and a recording layer has a relationship that an external magnetic field H1 is smaller than an external magnetic field H4, where the H1 is a minimum external magnetic field necessary to make a magnetization direction of the readout layer direct to the direction reverse to a magnetization direction of the recording layer substantially at the room temperature, and the H4 is a maximum external magnetic field necessary to make the magnetization direction of the readout layer direct to the direction same as the magnetization direction of the recording layer at an high temperature not lower than a predetermined temperature. Moreover, the magneto-optical disk is provided, between the readout layer and the recording layer, with an intermediate layer which inhibits an effective bias magnetic field from the recording layer to the readout layer at the room temperature. Since it is possible to reproduce only the information in the high-temperature area close to the center of the laser beam irradiated during reproducing, recording density is improved. Furthermore, since an initializing magnetic field at reproducing is not necessary and the reproducing magnetic field can be made smaller, the apparatus can be made smaller and the electric power consumption can be decreased.
摘要翻译：包括读出层和记录层的磁光记录介质具有外部磁场H1小于外部磁场H4的关系，其中H1是使读出磁化方向发生所需的最小外部磁场层直接与基本上在室温下的记录层的磁化方向相反的方向，并且H4是使读出层的磁化方向直到与磁化方向相同的方向所需的最大外部磁场记录层在不低于预定温度的高温下进行。此外，在读出层和记录层之间设置磁光盘，其中间层在室温下抑制从记录层到读出层的有效偏置磁场。由于只能再现靠近在再现期间照射的激光束的中心的高温区域的信息，所以记录密度提高。此外，由于不需要再现时的初始化磁场并且可以使再现磁场更小，所以可以使装置更小，并且可以降低电力消耗。

4. 发明授权

US5674583A Optical recording medium and manufacturing method thereof 失效
标题翻译：光记录介质及其制造方法
公开(公告)号：US5674583A
公开(公告)日：1997-10-07
申请号：US461164
申请日：1995-06-05
申请人： Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Kazuo Van
发明人： Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Kazuo Van
IPC分类号： G11B5/00 , G11B7/003 , G11B7/004 , G11B7/007 , G11B7/24 , G11B7/26 , G11B11/105 , G11B13/00 , G11B13/04 , G11B20/00 , G11B23/28 , G11B5/66
CPC分类号： G11B23/281 , G11B11/10582 , G11B13/00 , G11B13/04 , G11B13/045 , G11B23/28 , G11B5/00 , G11B7/0031 , G11B7/24 , G11B7/26 , G11B11/10502 , G11B20/00086 , G11B7/004 , G11B7/007 , Y10S428/90 , Y10T428/265
摘要： An optical tape including an optical recording layer for permitting information to be optically recorded thereon and a light-reflective magnetic layer; the light-reflective magnetic layer which reflects light projected onto the recording layer, also permits magnetic recording or magneto-optical recording to be performed thereon, thereby increasing a storage capacity of the optical tape remarkably; further, the optical tape is provided with a layer to form guiding grooves for tracking control, which layer to form guiding grooves is made up of ultraviolet-hardening resin, photo-resist, or a photochromic material.
摘要翻译：一种光学带，包括用于允许光学记录信息的光学记录层和光反射性磁性层; 反映投影到记录层上的光的光反射性的磁性层也可以在其上进行磁记录或磁光记录，从而显着地增加了光带的存储容量。此外，光带设置有层以形成用于跟踪控制的引导槽，其中形成导向槽的层由紫外线硬化树脂，光致抗蚀剂或光致变色材料构成。

5. 发明授权

US5662988A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5662988A
公开(公告)日：1997-09-02
申请号：US387294
申请日：1995-02-10
申请人： Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Yoshiteru Murakami
发明人： Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Yoshiteru Murakami
IPC分类号： G11B11/105 , G11B11/10 , G11B13/04
CPC分类号： G11B11/10586 , G11B11/10506 , G11B11/10515 , Y10S428/90 , Y10S430/146 , Y10T428/12632 , Y10T428/12861 , Y10T428/12986 , Y10T428/24942 , Y10T428/31678
摘要： The magneto-optical recording medium is provided with a readout layer which shows the in-plane magnetization and which changes from the in-plane magnetization to the vertical magnetization when its temperature rises higher than a predetermined temperature by irradiation of the light beam, a memory layer which records information thereon magneto-optically, an intermediate layer which keeps in-plane magnetization from room temperatures to its Curie temperature, and an writing layer which has a Curie temperature higher than that of the memory layer and has coercive force lower than that of the memory layer. Since the intermediate layer becomes a domain wall in optical modulation recording, it prevents the memory layer and the writing layer from forming a domain wall, so information can be recorded in good condition. Moreover, a portion of the readout layer besides a center portion of the light beam shows the in-plane magnetization and masks the memory layer at playback. Therefore, a recording bit can be made small and recording density can be improved without increasing interference of signals from neighboring recording bits, which causes noises.
摘要翻译：磁光记录介质设置有读出层，该读出层显示平面内的磁化强度，并且当读出层的温度通过照射光束而升高到高于预定温度时，其从平面内磁化强度变化到垂直磁化强度;存储器在磁光上记录信息的层，将室内的平面磁化保持到其居里温度的中间层，以及具有比存储层的居里温度高的居里温度并具有低于存储层的矫顽力的矫顽力的写层内存层。由于中间层成为光调制记录中的畴壁，因此防止存储层和写入层形成畴壁，因此可以将信息记录在良好状态。此外，除了光束的中心部分之外，读出层的一部分表示平面内磁化，并且在重放时掩蔽存储层。因此，可以使记录位小，并且可以提高记录密度，而不会增加来自相邻记录位的信号的干扰，这导致噪声。

6. 发明授权

US5427833A Magneto-optical recording medium and method for processing the surface 失效
标题翻译：磁光记录介质及表面处理方法
公开(公告)号：US5427833A
公开(公告)日：1995-06-27
申请号：US175957
申请日：1993-12-30
申请人： Junichiro Nakayama , Yoshiteru Murakami , Hiroyuki Katayama , Kenji Ohta
发明人： Junichiro Nakayama , Yoshiteru Murakami , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B11/10 , B29C59/02 , B29L17/00 , G11B5/60 , G11B7/26 , G11B11/105 , G11B5/66
CPC分类号： G11B5/6005 , G11B11/1058 , G11B11/10584 , Y10S428/90 , Y10S428/928 , Y10T428/218 , Y10T428/24355 , Y10T428/31935
摘要： A surface of a magneto-optical recording medium of the present invention is textured with fine and physical protrusions and recessions. The shapes of physical protrusions and recessions vary at each radial locations on the medium such that, for example, rough protrusions and recessions are formed in inner parts of the recording medium and fine protrusions and recessions are formed in outer parts thereof. Therefore, floating force given to a floating head from the medium being rotated based on the constant angular velocity method through an air layer in the outer parts equals floating force in the inner parts. Consequently, since the floating height of the floating head becomes constant irrespective of radial locations on the medium, information can be recorded under constant recording conditions, permitting the accuracy of the recording to improve. Regarding a method for processing the surface of a magneto-optical recording medium relating to the present invention, for example, a texture tape whose roughness is large is used in inner parts of the medium while a texture tape whose roughness is small is used in outer parts thereof. As a result, a magneto-optical recording medium having the above characteristics is produced.
摘要翻译：本发明的磁光记录介质的表面具有精细和物理的突出和凹陷的纹理。物理突起和凹陷的形状在介质上的每个径向位置处变化，使得例如在记录介质的内部形成粗糙的突起和凹陷，并且在其外部形成微小的突起和凹陷。因此，通过外部部分中的空气层，基于恒定的角速度法，从介质旋转的浮动浮动力等于内部部分的浮力。因此，由于浮动头的浮动高度与介质上的径向位置无关地变得恒定，所以可以在恒定的记录条件下记录信息，从而可以提高记录的准确性。关于本发明的磁光记录介质的表面的处理方法，例如，在粗糙度小的纹理带用于外部的粗糙度较小的纹理带时，粗糙度大的纹理带用于介质的内部，其部分。结果，产生具有上述特性的磁光记录介质。

7. 发明授权

US5353278A Magneto-optical disk and method of manufacturing the same 失效
标题翻译：磁光盘及其制造方法
公开(公告)号：US5353278A
公开(公告)日：1994-10-04
申请号：US694990
申请日：1991-05-02
申请人： Yoshiteru Murakami , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Hirotaka Toki
发明人： Yoshiteru Murakami , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Hirotaka Toki
IPC分类号： G11B11/105 , G11B23/00 , G11B5/54
CPC分类号： G11B23/0042 , G11B11/10582 , G11B11/10584
摘要： A magneto-optical disk comprising a substrate whereon a recording medium is formed, and a depression is formed on the substrate on the inside of the recording medium of the substrate. A center hub is installed on the depression such that the center hub is substantially level with a protective resin layer covering the recording medium. On the center hub, a flying head performs CSS (Contact Start and Stop). This configuration of the disk eliminates the occurrence of dust due to the abrasion and head crash, and achieves stable CSS. A method of manufacturing the magneto-optical disk, wherein the protective resin layer is formed after installing the center hub on the depression. In this method, since a space is not produced between the center hub and the protective resin layer, the stable flying characteristics is obtained. And a magneto-optical disk whereon small physical bumps and pits are formed on the substrate on the inside of the recording medium, which prevents the flying head from sticking to the disk. A method of manufacturing the magneto-optical disk by using a stamper, which permits the disk to be mass produced.
摘要翻译：一种磁光盘，包括形成记录介质的基板，并且在基板的记录介质的内侧上的基板上形成凹陷。中心毂安装在凹陷处，使得中心毂基本上与覆盖记录介质的保护树脂层水平。在中心枢纽上，飞头执行CSS（联系人启动和停止）。盘的这种配置消除了由于磨损和头部碰撞引起的灰尘的发生，并且实现了稳定的CSS。一种制造磁光盘的方法，其中在将中心毂安装在凹陷部之后形成保护树脂层。在该方法中，由于在中心轮毂和保护树脂层之间不产生空间，因此获得了稳定的飞行特性。另外，在记录介质的内侧的基板上形成小的物理凸点和凹坑的磁光盘，防止飞头粘附到盘上。通过使用压模来制造磁光盘的方法，该压模允许大量生产盘。

8. 发明授权

US5343448A External magnetic field device for a magnetooptical information recording and reproducing apparatus 失效
标题翻译：用于磁光信息记录和再现装置的外部磁场装置
公开(公告)号：US5343448A
公开(公告)日：1994-08-30
申请号：US949335
申请日：1992-09-22
申请人： Tomoyuki Miyake , Hiroyuki Katayama , Junichiro Nakayama , Takahiro Miyake , Kenji Ohta , Shozo Kobayashi
发明人： Tomoyuki Miyake , Hiroyuki Katayama , Junichiro Nakayama , Takahiro Miyake , Kenji Ohta , Shozo Kobayashi
IPC分类号： G11B11/105 , G11B11/00 , G11B11/10
CPC分类号： G11B11/10508
摘要： An external magnetic field device for a magnetooptical information recording and reproducing apparatus in which an external magnetic field to be applied to a magnetooptical information recording medium is modulated by supplying to a magnetic head an alternate current the polarity of which is changed according to information to be recorded. The device comprises an offset circuit for producing an offset in the alternate current. The direction of the offset is selected so as to increase the current level of the polarity by which the initial magnetization of the information recording medium is reversed. The direction of the offset may be selected so as to cancel the leakage magnetic field.
摘要翻译：一种用于磁光信息记录和再现装置的外部磁场装置，其中通过向磁头提供施加到磁光信息记录介质的外部磁场，该极性的极性根据要被改变的信息而改变记录。该装置包括用于在交流电中产生偏移的偏置电路。选择偏移的方向，以便增加信息记录介质的初始磁化反转的极性的电流电平。可以选择偏移的方向以抵消泄漏磁场。

9. 发明授权

US5338646A Optical memory device having an improved light reflection or optical memory layer 失效
标题翻译：具有改进的光反射或光存储层的光存储器件
公开(公告)号：US5338646A
公开(公告)日：1994-08-16
申请号：US15066
申请日：1993-02-08
申请人： Junichiro Nakayama , Tomoyuki Miyake , Hiroyuki Katayama , Kazuo Van , Kenji Ohta
发明人： Junichiro Nakayama , Tomoyuki Miyake , Hiroyuki Katayama , Kazuo Van , Kenji Ohta
IPC分类号： G11B7/24 , G11B7/244 , G11B7/247 , G11B7/248 , G11B7/251 , G11B7/254 , G11B7/257 , G11B7/258 , G03C1/72 , G11B5/702 , G11B5/706
CPC分类号： G11B7/258 , G11B7/244 , G11B7/2472 , G11B7/248 , G11B7/251 , G11B2007/24308 , G11B7/2533 , G11B7/2534 , G11B7/2542 , G11B7/2585 , G11B7/259 , G11B7/2595 , Y10S428/90 , Y10S430/146
摘要： An optical memory device comprising at least one transparent substrate and a light reflection layer or an optical memory layer laminated on one surface of the substrate, in which the light reflection layer or the optical memory layer is constituted with a UV-ray or electron-ray cured resin dispersingly containing a light reflective metal powder or an optical recording material.
摘要翻译：一种光学存储器件，包括至少一个透明基板和层叠在基板的一个表面上的光反射层或光学存储器层，其中光反射层或光学存储器层由UV射线或电子射线分散含有光反射金属粉末或光学记录材料的固化树脂。

10. 发明授权

US5303100A Magnetic disk device with floating-type magnetic head 失效
标题翻译：带浮动磁头的磁盘装置
公开(公告)号：US5303100A
公开(公告)日：1994-04-12
申请号：US752052
申请日：1991-08-29
申请人： Junichiro Nakayama , Hiroyuki Katayama , Tomoyuki Miyake , Kenji Ohta
发明人： Junichiro Nakayama , Hiroyuki Katayama , Tomoyuki Miyake , Kenji Ohta
IPC分类号： G11B21/21 , G11B5/54 , G11B11/10 , G11B11/105 , G11B19/20 , G11B21/12 , G11B5/55
CPC分类号： G11B19/20 , G11B11/10556 , G11B11/1058 , G11B11/10586 , G11B11/10595 , G11B5/54
摘要： A magnetic disk device having a floating-type magnetic head, for use with a disk-shaped recording medium having a sliding area for the floating-type magnetic head formed outside a recording area. The length in the disk radial direction of a suspension supporting the floating-type magnetic head is varied depending on individual magnetic disk devices. In another arrangement, a control means is provided for setting two reference values so that a radial position of the floating-type magnetic head detected by a detection section is compared with these reference values, and for alternating one of the preset reference values to the other reference value upon receiving a rotation stop signal. In still another arrangement, control means is provided, whereby a radial position for sliding of the floating-type magnetic head is randomly varied within the sliding area. According to these arrangements, since the radial position for sliding of the floating-type magnetic head is varied within the sliding area without being located at the same position, abrasion within the sliding area can be dispersed. As a result, it becomes possible to extend the longevities of the floating-type magnetic head and the recording medium.
摘要翻译：一种具有浮动型磁头的磁盘装置，与形成在记录区域之外的浮动型磁头的滑动区域的盘形记录介质一起使用。支撑浮动型磁头的悬架的盘径方向上的长度根据各个磁盘装置而变化。在另一种布置中，提供控制装置用于设置两个参考值，使得由检测部分检测到的浮动型磁头的径向位置与这些参考值进行比较，并且将一个预设参考值与另一个参考值交替接收到旋转停止信号时的参考值。在另一种布置中，提供控制装置，由此浮动式磁头的滑动的径向位置在滑动区域内随机变化。根据这些布置，由于浮动型磁头的滑动的径向位置在滑动区域内变化而不位于相同的位置，所以可以分散滑动区域内的磨损。结果，可以延长浮动型磁头和记录介质的寿命。

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