公开(公告)号：US06529341B1

公开(公告)日：2003-03-04

申请号：US09530314

申请日：2000-07-25

申请人： Tatsuaki Ishida ,  Taizou Hamada ,  Kiyokazu Tohma ,  Hiroshi Ryonai ,  Keizou Miyata

发明人： Tatsuaki Ishida ,  Taizou Hamada ,  Kiyokazu Tohma ,  Hiroshi Ryonai ,  Keizou Miyata

IPC分类号： G11B509

CPC分类号： B82Y10/00 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/59633 ,  G11B5/59688 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B5/865 ,  G11B27/3027 ,  G11B2220/20

摘要： A magnetic disk for a magnetic recording/reproduction device includes a magnetic head, wherein a magnetization bit-pattern corresponding to a preformat information signal is recorded beforehand on the magnetic disk, wherein the magnetization bit-pattern is recorded by contacting a surface of the magnetic disk with a surface of a master information carrier having a pattern corresponding to the preformat information signal, and a portion of the magnetization bit-pattern corresponding to at least one signal selected from a clock signal and a synchronous signal has a recording width that is larger than a recording track width of the magnetic head in a radial direction of the magnetic disk.

摘要翻译： 用于磁记录/再现装置的磁盘包括磁头，其中预先对应于预格式化信息信号的磁化位模式被预先记录在磁盘上，其中磁化位模式通过使磁性记录/再现装置的表面接触来记录 具有与预格式信息信号对应的图案的主信息载体的表面的磁盘，并且与从时钟信号和同步信号中选择的至少一种信号相对应的磁化位模式的一部分具有较大的记录宽度 比磁头在磁盘的径向方向上的记录磁道宽度大。

公开(公告)号：US06242085B1

公开(公告)日：2001-06-05

申请号：US09153579

申请日：1998-09-15

申请人： Hiroshi Ryonai ,  Tatsuaki Ishida ,  Kiyokazu Tohma ,  Keizou Miyata ,  Taizou Hamada

发明人： Hiroshi Ryonai ,  Tatsuaki Ishida ,  Kiyokazu Tohma ,  Keizou Miyata ,  Taizou Hamada

IPC分类号： G11B566

CPC分类号： G11B5/656 ,  G11B5/851 ,  G11B5/855 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： An underlying layer is formed of Cr or the like on a glass substrate, and a magnetic layer is formed on the underlying layer by simultaneously sputtering a magnetic substance and a non-magnetic substance that does not form a solid solution with the magnetic substance in an atmosphere having a pressure of 30 mTorr to 75 mTorr. The magnetic recording medium comprises clusters, each of which is formed of aggregated magnetic grains, and a non-magnetic substance between the clusters. Each magnetic grain has a grain diameter of 5 nm to 20 nm. An average gap between the clusters is 1.5 nm to 5 nm. Thus, the present invention can provide a magnetic recording medium having a high S/N ratio that is suitable for high density recording.

摘要翻译： 在玻璃基板上由Cr等形成下层，通过同时将磁性物质和不与磁性物质形成固溶体的非磁性物质同时溅射在基底层上而形成磁性层 压力为30mTorr至75mTorr的气氛。 磁记录介质包括由聚集的磁性颗粒形成的簇和簇之间的非磁性物质。 每个磁性颗粒具有5nm至20nm的粒径。 簇之间的平均间隙为1.5nm至5nm。 因此，本发明可以提供适用于高密度记录的具有高S / N比的磁记录介质。

公开(公告)号：US06567227B2

公开(公告)日：2003-05-20

申请号：US10108029

申请日：2002-03-26

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata ,  Hiroshi Ryonai

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata ,  Hiroshi Ryonai

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

公开(公告)号：US06961196B2

公开(公告)日：2005-11-01

申请号：US10396674

申请日：2003-03-25

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata ,  Hiroshi Ryonai

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata ,  Hiroshi Ryonai

IPC分类号： G11B5/596 ,  G11B5/64 ,  G11B5/855 ,  G11B5/86

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

摘要翻译： 主信息载体包括其表面具有对应于信息信号的压纹图案的基板。 浮雕图案的突出部分的至少一个表面由铁磁材料制成。 通过使磁记录介质的表面与主信息载体接触，将信息信号写入具有铁磁薄膜或涂层的片或磁盘记录介质的方法，以写入对应于 主信息载体的压花图案进入磁记录介质。

公开(公告)号：US06347016B1

公开(公告)日：2002-02-12

申请号：US09101590

申请日：1998-07-13

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Keizou Miyata ,  Hiroshi Ryonai

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Keizou Miyata ,  Hiroshi Ryonai

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

公开(公告)号：US06606209B2

公开(公告)日：2003-08-12

申请号：US10108032

申请日：2002-03-26

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Keizou Miyata ,  Hiroshi Ryonai

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Keizou Miyata ,  Hiroshi Ryonai

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

公开(公告)号：US06606208B2

公开(公告)日：2003-08-12

申请号：US10085503

申请日：2002-02-26

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

公开(公告)号：US06590727B2

公开(公告)日：2003-07-08

申请号：US10027871

申请日：2001-12-21

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

公开(公告)号：US06587290B2

公开(公告)日：2003-07-01

申请号：US10086236

申请日：2002-02-26

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazunari Yoshimoto ,  Keizou Miyata

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

摘要翻译： 主信息载体包括其表面具有对应于信息信号的压纹图案的基板。 浮雕图案的突出部分的至少一个表面由铁磁材料制成。 通过使磁记录介质的表面与主信息载体接触，将信息信号写入具有铁磁薄膜或涂层的片或磁盘记录介质的方法，以写入对应于 主信息载体的压花图案进入磁记录介质。

公开(公告)号：US5973892A

公开(公告)日：1999-10-26

申请号：US635353

申请日：1996-04-19

申请人： Kenji Hasegawa ,  Yoshiaki Mizoh ,  Norimoto Nouchi ,  Masaya Sakaguchi ,  Keizou Miyata ,  Tetsuo Fuchi

发明人： Kenji Hasegawa ,  Yoshiaki Mizoh ,  Norimoto Nouchi ,  Masaya Sakaguchi ,  Keizou Miyata ,  Tetsuo Fuchi

IPC分类号： G11B5/41 ,  G11B5/53 ,  G11B15/665

CPC分类号： G11B15/6653 ,  G11B5/41 ,  G11B5/53

摘要： A head cleaner for a magnetic recording and/or reproducing apparatus for cleaning rotary magnetic heads. The head cleaner includes a rotary spindle rotatably mounted on a support arm movable between an operative position, in which the head cleaner is in position to clean the magnetic heads, and an inoperative position separated from the magnetic heads. The head cleaner also includes a plurality of oblong webs of non-woven fabric with or without an abrasive material coated on one surface thereof. The oblong webs of non-woven fabric are fixedly secured to the rotary spindle so as to extend radially outwardly therefrom while being spaced an equal distance from each other in a direction circumferentially thereof.

摘要翻译： 一种用于清洁旋转磁头的磁记录和/或再现装置的头清洁器。 头部清洁器包括可旋转地安装在支撑臂上的旋转主轴，该支撑臂可在操作位置之间移动，在操作位置，头部清洁器位于其中以清洁磁头，以及与磁头分离的不工作位置。 头部清洁器还包括多个具有或不具有涂覆在其一个表面上的研磨材料的无纺织物的长方形网状物。 无纺布的长方形腹板固定地固定在旋转主轴上，从而沿径向向外延伸，同时在其圆周方向上彼此间隔相等的距离。