专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20130057977A1 MAGNETIC RECORDING REPRODUCING APPARATUS AND MAGNETIC RECORDING MEDIUM 有权
标题翻译：磁记录重放装置和磁记录介质
公开(公告)号：US20130057977A1
公开(公告)日：2013-03-07
申请号：US13586984
申请日：2012-08-16
申请人： Toshihiko Sakai , Yoshiteru Murakami
发明人： Toshihiko Sakai , Yoshiteru Murakami
IPC分类号： G11B21/02 , G11B5/82
CPC分类号： G11B5/09 , G11B5/012 , G11B2005/0005
摘要： In information recording areas of a disc-shaped magnetic recording medium, recording columns adjacent to each other relative to a radial direction are formed to partially overlap with each other in the radial direction. A first recording and a second recording are selectively performed. In the first recording, a first recording column, a second recording column (the outer adjacent recording column of the first recording column) and a third recording column (the outer adjacent recording column of the second recording column) are formed so that the radial positions of the inner and outer circumferential edges of the first recording column, those of a second recording column, and those of a third recording column satisfy R1in
摘要翻译：在盘形磁记录介质的信息记录区域中，相对于径向相邻的记录柱形成为在径向上彼此部分重叠。选择性地执行第一记录和第二记录。在第一记录中，形成第一记录列，第二记录列（第一记录列的外相邻记录列）和第三记录列（第二记录列的外相邻记录列），使得径向位置第一记录列的内周边缘和第二记录列的外圆周边缘和第三记录列的内圆周边缘和外圆周边缘满足R1in

2. 发明授权

US08130457B2 Magnetic recording/reproducing apparatus and method for determining magnetic recording condition 有权
标题翻译：用于确定磁记录条件的磁记录/再现装置和方法
公开(公告)号：US08130457B2
公开(公告)日：2012-03-06
申请号：US12514256
申请日：2007-11-07
申请人： Ikuo Nakano , Yoshiteru Murakami , Shigemi Maeda
发明人： Ikuo Nakano , Yoshiteru Murakami , Shigemi Maeda
IPC分类号： G11B27/36 , G11B5/02
CPC分类号： G11B5/02 , G11B11/10536 , G11B2005/001 , G11B2005/0021
摘要： A magnetic recording/reproducing apparatus 100 includes: a magnetic head 1; a magnetic recording medium 2; a spindle 3 and a spindle motor 4; a suspension arm 5; a voice coil motor 6; and a control unit 7. The control unit 7 has: a motor driver 8; a head amplifier 9; a read/write channel 10; a laser driver 11; and a controller 12. The controller 12 has: a preliminary recording unit 13; a judgment unit 14; an extraction unit 15; a drive condition determining unit 16; and a preliminary recording terminating unit 17. Based on a reproduction signal evaluation value obtained using these units and a predetermined reference value, a drive condition is determined which is suitable for recording onto the magnetic recording medium 2.
摘要翻译：磁记录/再现装置100包括：磁头1; 磁记录介质2; 主轴3和主轴电动机4; 悬架臂5; 音圈电机6; 和控制单元7.控制单元7具有：马达驱动器8; 头放大器9; 读/写通道10; 激光驱动器11; 和控制器12.控制器12具有：初步记录单元13; 判断单元14; 提取单元15; 驱动条件确定单元16; 和预备记录终止单元17.基于使用这些单元获得的再现信号评估值和预定参考值，确定适合于记录在磁记录介质2上的驱动条件。

3. 发明申请

US20100254243A1 Optical information recording medium and optical information processing apparatus 审中-公开
公开(公告)号：US20100254243A1
公开(公告)日：2010-10-07
申请号：US12801485
申请日：2010-06-11
申请人： Go Mori , Hirohisa Yamada , Masaki Yamamoto , Yasuhiro Harada , Hideharu Tajima , Shigemi Maeda , Yoshiteru Murakami
发明人： Go Mori , Hirohisa Yamada , Masaki Yamamoto , Yasuhiro Harada , Hideharu Tajima , Shigemi Maeda , Yoshiteru Murakami
IPC分类号： G11B7/00
CPC分类号： G11B20/18 , G11B7/00736 , G11B7/24065 , G11B7/252 , G11B7/258 , G11B20/10009 , G11B20/10046 , G11B20/1012 , G11B20/10481 , G11B20/1217 , G11B20/1426 , G11B2220/2541 , G11B2220/2579
摘要： This invention allows super-resolution reproduction with which a better bER value is attainable, when information is recorded by a random pattern including a mark length not longer than a resolution limit, by use of a highly versatile signal decoding method.Information is recorded as marks and spaces coded by RLL(1,7) modulation, which each of the marks and spaces have one of a plurality of lengths, and 2T marks and 2T spaces of the marks and spaces being formed are shorter than 0.12 μm. An information recording layer (20) includes a reproduction film (21) and a reflective film (22) which are provided in this order from a side from which reproducing light is incident, which reproduction film is made of (i) zinc oxide, (ii) strontium titanate, (iii) titanium oxide, (iv) cerium oxide, or (v) a material including at least one of the (i) through (iv), and which reflective film is made of tantalum or titanium.

4. 发明申请

US20100232269A1 OPTICAL INFORMATION STORAGE MEDIUM REPRODUCTION APPARATUS AND CONTROL METHOD OF THE SAME 审中-公开
公开(公告)号：US20100232269A1
公开(公告)日：2010-09-16
申请号：US12734169
申请日：2008-09-25
申请人： Masaki Yamamoto , Hirohisa Yamada , Yasuhiro Harada , Go Mori , Hideharu Tajima , Shigemi Maeda , Yoshiteru Murakami
发明人： Masaki Yamamoto , Hirohisa Yamada , Yasuhiro Harada , Go Mori , Hideharu Tajima , Shigemi Maeda , Yoshiteru Murakami
IPC分类号： G11B20/10
CPC分类号： G11B7/00 , G11B7/0037 , G11B7/005 , G11B7/08511 , G11B7/12 , G11B7/126 , G11B7/1263 , G11B7/24 , G11B7/24038 , G11B19/125 , G11B19/128 , G11B2007/0013
摘要： In an optical information storage medium reproduction apparatus (10) for reproducing an optical information storage medium including a plurality of information recording layers each including a recording mark having a length shorter than an optical system resolution limit, reproduction laser power for reading an information recording layer closest to a reproduction-laser-incident surface of the optical information storage medium is set to be lower than reproduction laser power for reading an information recording layer farthest from the reproduction-laser-incident surface but not lower than minimum reproduction laser power that satisfies a reproduction signal characteristic that the optical information storage medium reproduction apparatus (10) requires. With the arrangement, it is possible to prevent that the information recording layer closest to the reproduction-laser-incident surface is irradiated wrongly with reproduction laser having high reproduction laser power, thereby making it possible to obtain successful reproduction quality. That is, it is possible to realize the optical information storage medium reproduction apparatus (10) that can set optimum reproduction laser power and perform stable super resolution reproduction.

5. 发明授权

US06665235B2 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium 失效
标题翻译：磁光记录介质以及用于磁光记录介质的记录和再现方法和光头
公开(公告)号：US06665235B2
公开(公告)日：2003-12-16
申请号：US10214881
申请日：2002-08-08
申请人： Yoshiteru Murakami , Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta , Naoyasu Iketani
发明人： Yoshiteru Murakami , Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta , Naoyasu Iketani
IPC分类号： G11B1100
CPC分类号： G11B11/10586 , B60T1/005 , F16D63/00 , G11B7/00718 , G11B7/126 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10595
摘要： Featured is a recording and reproducing method of a magneto-optical recording medium including a recording layer for recording thereon information magneto-optically and a readout layer which has in-plane magnetization at room temperature and where a transition occurs from in-plane magnetization to perpendicular magnetization as temperature raises. The method includes projecting a light beam onto such a magneto-optical recording medium so as to form a perpendicularly magnetized area in the readout layer by duplication of the magnetization of said recording layer to the area. In further embodiments, the recording medium further includes an intermediate layer made of non-magnetic film formed between the readout and recording layers and the readout and recording layers are composed of rare-earth transition metal alloys such as TbFeCo (recoding layer) readout layer, made of GdFeCo (readout layer).
摘要翻译：特别是磁光记录介质的记录和再现方法，其包括用于在其上记录磁光信息的记录层和在室温下具有面内磁化的读出层，并且其中从面内磁化转变为垂直磁化随温度升高。该方法包括将光束投影到这种磁光记录介质上，以便通过将所述记录层的磁化复制到该区域而在读出层中形成垂直磁化区域。在另外的实施例中，记录介质还包括由读出和记录层之间形成的非磁性膜制成的中间层，并且读出和记录层由稀土过渡金属合金如TbFeCo（记录层）读出层，由GdFeCo（读出层）制成。

6. 发明授权

US06483785B1 Magneto-optical recording method using the relation of beam diameter and an aperture of converging lens 失效
标题翻译：使用光束直径与会聚透镜孔径的磁光记录方法
公开(公告)号：US06483785B1
公开(公告)日：2002-11-19
申请号：US09685829
申请日：2000-10-10
申请人： Yoshiteru Murakami , Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta , Naoyasu Iketani
发明人： Yoshiteru Murakami , Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta , Naoyasu Iketani
IPC分类号： G11B1100
CPC分类号： G11B7/126 , G11B7/00718 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10584 , G11B11/10586 , G11B11/10595 , Y10S428/90
摘要： Featured is a recording and reproducing method for recording and reproducing information on and from a recording medium. The medium includes a base having a property that a light can be transmitted therethrough, a readout layer formed on the base, which has an in-plane magnetization at room temperature, whereas, a transition occurs from in-plane magnetization to perpendicular magnetization as temperature rises and a recording layer formed on said readout layer for recording thereon information magneto-optically. A groove for guiding a light beam is formed on a readout layer side of the base and a groove width is set substantially equal to a land width formed between grooves. The recording layer on the grooves and the recording layer on lands are used in recording and reproducing information. Further a light beam is incident on a converging lens of an optical head, the light beam having a larger diameter &ohgr; than an aperture &agr; of the converging lens for converging the light beam on a predetermined position of the magneto-optical recording medium.
摘要翻译：特色是用于在记录介质上记录和再现信息的记录和再现方法。该介质包括具有光可以透射的性质的基底，形成在基底上的读出层，其在室温下具有面内磁化强度，而从平面内磁化转变为垂直磁化转变为温度并且在所述读出层上形成用于在其上记录光学信息的记录层。在基板的读出层侧形成用于引导光束的槽，并且将槽宽度设定为与槽之间形成的焊盘宽度大致相等。凹槽上的记录层和焊盘上的记录层用于记录和再现信息。此外，光束入射到光学头的会聚透镜上，所述光束具有比会聚透镜的孔径α更大的直径Ω，用于将光束会聚在磁光记录介质的预定位置。

7. 发明授权

US06456586B1 Magneto-optical recording medium and process for producing the same 失效
标题翻译：磁光记录介质及其制造方法
公开(公告)号：US06456586B1
公开(公告)日：2002-09-24
申请号：US09392248
申请日：1999-09-09
申请人： Ippei Suzuki , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi
发明人： Ippei Suzuki , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi
IPC分类号： G11B1110
CPC分类号： G11B11/10584 , G11B11/10586 , G11B11/10589
摘要： A magneto-optical recording medium comprising a reproducing magnetic layer having a magnetic layer which is in an in-plane magnetization state at room temperature but shifts to a perpendicular magnetization state as temperature rises, a dielectric layer and a recording magnetic layer having a magnetic layer which exhibits a perpendicular magnetization, sequentially from a photo-receptive side, the recording medium being further comprising a metal layer between the reproducing magnetic layer and the dielectric layer.
摘要翻译：一种磁光记录介质，包括具有磁性层的再现磁性层，所述磁性层在室温下处于平面内的磁化状态，但随着温度升高而转变为垂直磁化状态，介电层和具有磁性层的记录磁性层其从光接收侧顺序地显示垂直磁化，所述记录介质还包括在再现磁性层和介电层之间的金属层。

8. 发明授权

US06298018B1 Optical recording and reproducing method optical recording and reproducing device, and optical recording medium 失效
标题翻译：光学记录和再现方法光学记录和再现装置，以及光学记录介质
公开(公告)号：US06298018B1
公开(公告)日：2001-10-02
申请号：US09264416
申请日：1999-03-08
申请人： Akira Takahashi , Yoshiteru Murakami , Naoyasu Iketani , Ippei Suzuki , Go Mori , Shinya Hirata
发明人： Akira Takahashi , Yoshiteru Murakami , Naoyasu Iketani , Ippei Suzuki , Go Mori , Shinya Hirata
IPC分类号： G11B712
CPC分类号： B82Y10/00 , G11B7/122 , G11B7/1374 , G11B7/1387 , G11B7/24 , G11B11/10532 , G11B11/10554 , G11B11/1058 , G11B11/10584 , G11B2007/13727
摘要： An optical disk is provided with a recording layer, and with an optical coupling layer on a light-incident side of the recording layer. An optical recording and reproducing device and method include an objective lens and a hemispherical lens, which converge a light beam from a light source and project the light beam onto the optical disk. The hemispherical lens is provided in close proximity to the optical coupling layer, in a position such that an interval therebetween is not more than the wavelength of the light produced by the light source. The light beam converged by the objective lens and the hemispherical lens is coupled with the optical coupling layer while substantially maintaining a direction of propagation in which it was propagating while inside the hemispherical lens.
摘要翻译：光盘设有记录层，并在记录层的光入射侧具有光耦合层。光学记录和再现装置和方法包括物镜和半球形透镜，其将来自光源的光束会聚并将光束投射到光盘上。半球形透镜设置在光耦合层的附近，使得它们之间的间隔不大于由光源产生的光的波长。由物镜会聚的光束和半球透镜与光耦合层耦合，同时在半球形透镜的内部基本上保持传播方向传播。

9. 发明授权

US06272077B1 Magneto-optical recording medium having intermediate layer of in plane magnetization 有权
标题翻译：具有平面磁化中间层的磁光记录介质
公开(公告)号：US06272077B1
公开(公告)日：2001-08-07
申请号：US09479256
申请日：2000-01-07
申请人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
发明人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
IPC分类号： G11B1110
CPC分类号： G11B11/10584 , G11B11/10515 , G11B11/10586 , G11B11/10593
摘要： A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
摘要翻译：根据本发明的磁光存储介质包括再现层，其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层，其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层，居里温度在上述预定温度。在该介质中，在低于预定温度的温度下，记录层中以高密度记录的信号被屏蔽，并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。然而，在高于预定温度的温度下，在形成面内磁化层的一部分的区域内，磁静电耦合记录层和再现层，并且将记录层的记录位复制并扩展到磁畴中再现层。因此，利用该介质，通过从再现层的扩展磁畴再现，可以以高信号质量再现以高密度记录的记录位的信息。

10. 发明授权

US06147939A Magneto-optical recording medium having intermediate layer of in-plane magnetization 失效
标题翻译：具有平面内磁化中间层的磁光记录介质
公开(公告)号：US06147939A
公开(公告)日：2000-11-14
申请号：US32985
申请日：1998-03-02
申请人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
发明人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
IPC分类号： G11B11/105 , G11B11/00
CPC分类号： G11B11/10584 , G11B11/10515 , G11B11/10586 , G11B11/10593
摘要： A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
摘要翻译：根据本发明的磁光存储介质包括再现层，其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层，其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层，居里温度在上述预定温度。在该介质中，在低于预定温度的温度下，记录层中以高密度记录的信号被屏蔽，并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。然而，在高于预定温度的温度下，在形成面内磁化层的一部分的区域内，磁静电耦合记录层和再现层，并且将记录层的记录位复制并扩展到磁畴中再现层。因此，利用该介质，通过从再现层的扩展磁畴再现，可以以高信号质量再现以高密度记录的记录位的信息。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式