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。

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。

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。

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。

公开(公告)号：US5270994A

公开(公告)日：1993-12-14

申请号：US931990

申请日：1992-08-19

申请人： Junichiro Nakayama ,  Tomoyuki Miyake ,  Hiroyuki Katayama ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Tomoyuki Miyake ,  Hiroyuki Katayama ,  Kenji Ohta

IPC分类号： G11B11/105 ,  G11B19/02 ,  G11B7/00

CPC分类号： G11B11/10595 ,  G11B11/10517 ,  G11B11/10523 ,  G11B11/1056 ,  G11B19/02

摘要： A recording and reading method and device of magneto-optical memory elements are provided to record and read an information signal to and from the magneto-optical memory elements, which contain at least two magnetic layers that are magnetically coupled, by means of a light-intensity modulated overwriting method employing a recording magnetic field and an initializing magnetic field. A control feature is included for applying the initializing magnetic field to the magneto-optical memory elements at least one time between the point of time when moving the magneto-optical memory elements to a recording or reading position, finishing a reading or recording, and ascertaining the selected operation such as recording or erasing and the point of time when subsequent recording begins such that the initializing magnetic field is not applied at the same time as the recording magnetic field.

摘要翻译： 提供磁光存储器元件的记录和读取方法和装置，用于通过发光元件记录和读取与包含至少两个磁耦合的磁层的磁光存储元件的信息信号， 采用记录磁场和初始化磁场的强度调制重写方法。 包括控制特征，用于在将磁光存储元件移动到记录或读取位置，完成读取或记录之间的时间点之间的至少一个时间将初始化磁场施加到磁光存储元件，并且确定 所选择的操作如记录或擦除以及后续记录开始的时间点，使得初始化磁场不与记录磁场同时施加。

公开(公告)号：US5233597A

公开(公告)日：1993-08-03

申请号：US714933

申请日：1991-06-13

申请人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Kenji Ohta

IPC分类号： G11B11/105 ,  G11B23/00

CPC分类号： G11B23/0021 ,  G11B11/10584 ,  Y10S430/146

摘要： A magneto-optical disk according to the present invention has a substrate (12), a recording layer (13) formed on the substrate and an outer layer (14) formed on the recording layer, above which a floating head is hovered. The outer layer is constituted of a protective layer, an antisticking layer for head, having a texture formed on its surface and other layers. The magneto-optical disk is designed such that, when rotated at a constant angular velocity, the thickness of the outer layer (14) is substantially inversely proportional to a radial position r on the magneto-optical disk raised to the 1/2nd power. In the formation of the outer layer, a screen whose meshes become gradually finer from the innermost portion toward the circumferential portion of the magneto-optical disk is employed based on the screen printing technique. Further, photo hardening resin is used as the outer layer, and simply by changing a wavelength or irradiation amount of light to be applied thereto, a texture is readily formed on the surface of the outer layer. By the use of the present invention, stable recording, erasing and re-writing operations are achieved, and it becomes possible to prevent the floating head from sticking to the magneto-optical disk and reduce the cost thereof.

公开(公告)号：US5214636A

公开(公告)日：1993-05-25

申请号：US421757

申请日：1989-10-16

申请人： Toshio Ishikawa ,  Hiroyuki Katayama ,  Kazuo Van ,  Tomoyuki Miyake ,  Junichiro Nakayama ,  Kenji Ohta ,  Hideyoshi Yamaoka

发明人： Toshio Ishikawa ,  Hiroyuki Katayama ,  Kazuo Van ,  Tomoyuki Miyake ,  Junichiro Nakayama ,  Kenji Ohta ,  Hideyoshi Yamaoka

IPC分类号： G11B7/24053 ,  G11B7/253 ,  G11B7/254

CPC分类号： G11B7/253 ,  G11B7/24053 ,  G11B7/254

摘要： An optical recording element according to the present invention comprising: (i) a transparent substrate through which light passes; (ii) a transparent low-resistance layer having a specific resistance so as to prevent the adhesion of dust to the surface of the element caused by a static charge, the layer being formed on the surface, on which a light beam is incident, of the transparent substrate; and (iii) an optical thin film composed of at least one layer, formed on the other surface of the transparent substrate so as to transmit light beams used for recording, erasing and playback, and reflect lights which have wavelengths different from the wavelength of the above light beams and are within a specified visible region of the spectrum. With this arrangement, lights within a specified visible region of the spectrum are reflected so that the element appears to be colored according to the wavelengths of the reflected lights. Also, a problem often found in a conventional optical recording element having a transparent substrate of a resin material that the surface of the element is hardened by a light beam, can be solved. Even if a static charge is generated on the surface of such an element, the conductive transparent low-resistance substrate can eliminate the static charge outward whereby a static charge is less likely to be accumulated and the surface can be kept clean in order to improve the reliability.

摘要翻译： 根据本发明的光学记录元件包括：（i）光通过的透明基板; （ii）具有电阻率的透明低电阻层，以防止由静电引起的灰尘附着在元件表面上，该层形成在光束入射的表面上的层是 透明基板; 和（iii）由至少一层构成的光学薄膜，形成在透明基板的另一个表面上，以透射用于记录，擦除和重放的光束，并且反射具有与波长不同的波长的光 在光束之上，并且在光谱的指定可视区域内。 通过这种布置，光谱的指定可视区域内的光被反射，使得该元件看起来根据反射光的波长着色。 而且，通过在具有树脂材料的透明基板的光学记录元件中经常发现的问题在于，元件的表面被光束硬化。 即使在这种元件的表面上产生静电荷，导电透明低电阻基板也可以向外消除静电荷，由此静电荷不易累积，并且表面可以保持清洁以改善 可靠性。

公开(公告)号：US5157568A

公开(公告)日：1992-10-20

申请号：US624404

申请日：1990-12-07

申请人： Hiroyuki Katayama ,  Junichiro Nakayama ,  Tomoyuki Miyake ,  Kenji Ohta

发明人： Hiroyuki Katayama ,  Junichiro Nakayama ,  Tomoyuki Miyake ,  Kenji Ohta

IPC分类号： G11B5/105 ,  G11B5/60 ,  G11B11/105

CPC分类号： G11B5/6005 ,  G11B11/1058 ,  G11B5/105

摘要： A floating type magnetic head device of the present invention includes a slider capable of floating above a recording medium while moving relatively to the recording medium, and a magnetic head. The magnetic head is incorporated inside a cavity section formed substantially in the center of the slider. By incorporating the magnetic head inside the cavity section, the magnetic head can be protected, thereby reducing a possibility of head crash of the magnetic head due to its contact with dust or a projecting object existing on the surface of the recording medium. Further, by disposing the magnetic head substantially in the center of the slider, it can be avoided that the direction of an air stream at the center of the slider varies depending on an instantaneous position in a radial direction of the recording medium, thereby providing stable floating characteristics of the floating type magnetic head device and improving accuracy of recording.

摘要翻译： 本发明的浮动式磁头装置包括能够在相对于记录介质移动的同时在记录介质上漂浮的滑块和磁头。 磁头装在基本上形成在滑块中心的空腔部分内。 通过将磁头结合在空腔部分内，可以保护磁头，从而减少磁头由于与灰尘或存在于记录介质表面上的突出物体的接触而头部碰撞的可能性。 此外，通过将磁头设置在滑块的中心，可以避免滑块中心处的空气流的方向根据记录介质的径向方向上的瞬时位置而变化，从而提供稳定的 浮动式磁头装置的浮动特性，提高记录精度。

公开(公告)号：US5989671A

公开(公告)日：1999-11-23

申请号：US879916

申请日：1997-06-20

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 ,  G11B5/60

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. The layer to form guiding grooves is made up of ultraviolet-hardening resin, photo-resist, or a photochromic material. For example, in the case of using ultraviolet-hardening resin, after a guiding groove pattern has been exposed by projecting an ultraviolet ray on a layer made up of ultraviolet-hardening resin, the exposed areas harden to form areas corresponding to guiding grooves between those exposed areas. The guiding grooves are formed by removing the areas corresponding to guiding grooves from the layer made up of the ultraviolet-hardening resin. Additionally, along with a guiding groove pattern, an index pattern can also be exposed. The guiding grooves thus formed do not reduce the recording density for information of the optical tape.

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。 反射投影到记录层上的光的光反射性磁性层也可以在其上进行磁记录或磁光记录，从而显着提高光带的存储容量。 此外，光带设置有一层以形成用于跟踪控制的引导槽。 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。 例如，在使用紫外线硬化树脂的情况下，通过在由紫外线固化型树脂构成的层上投射紫外线而引导槽图案露出后，露出的区域变硬，形成与引导槽对应的区域 暴露地区。 通过从由紫外线固化树脂构成的层去除与导向槽相对应的区域来形成引导槽。 另外，与引导槽图案一样，还可以暴露索引图案。 如此形成的引导槽不会降低用于光带的信息的记录密度。

公开(公告)号：US5707727A

公开(公告)日：1998-01-13

申请号：US395165

申请日：1995-02-27

申请人： Akira Takahashi ,  Yoshiteru Murakami ,  Junsaku Nakajima ,  Kenji Ohta ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Michinobu Mieda

发明人： Akira Takahashi ,  Yoshiteru Murakami ,  Junsaku Nakajima ,  Kenji Ohta ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Michinobu Mieda

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66 ,  B32B5/16 ,  G11B5/02 ,  G11B11/00

CPC分类号： G11B11/10593 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10517 ,  G11B11/10586 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium has a recording layer whereon information is magneto-optically recorded. A readout layer is provided on the recording layer. The readout layer has a compensating temperature that is located between room temperature and the Curie temperature. In the readout layer, upon an application of a light beam, the in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to vertical magnetization occurs as the temperature of the irradiated area of the readout layer rises above a predetermined temperature. By employing this magneto-optical recording medium, with an application of a light beam that is intensity modulated into two levels, only a spot having a temperature not less than a predetermined temperature is involved in the reproduction; therefore, a recorded bit with a size smaller than the diameter of the light beam can be reproduced, thereby greatly increasing the recording density. Further, the level of the reproduced signals is increased, and crosstalk from the adjoining tracks is reduced; thus, information recording and overwriting can be conducted more easily.

摘要翻译： 磁光记录介质具有磁信息记录信息的记录层。 读出层设置在记录层上。 读出层具有位于室温和居里温度之间的补偿温度。 在读出层中，在施加光束时，在室温下发生平面内磁化，并且随着读出层的照射区域的温度上升到预定值以上，从面内磁化向垂直磁化的转变发生 温度。 通过采用该磁光记录介质，通过施加强度调制为两个级别的光束，只有具有不低于预定温度的温度的点参与再现; 因此，可以再现具有小于光束直径的尺寸的记录位，从而大大提高记录密度。 此外，再现信号的电平增加，并且来自相邻轨道的串扰减小; 因此，可以更容易地进行信息记录和重写。