公开(公告)号：US07301714B2

公开(公告)日：2007-11-27

申请号：US11087669

申请日：2005-03-24

申请人： Masakazu Nishikawa

发明人： Masakazu Nishikawa

IPC分类号： G11B5/86

CPC分类号： G11B5/865 ,  G11B5/012 ,  G11B5/82 ,  G11B2005/001

摘要： A magnetic pattern, in which errors due to sub-pulses do not occur during signal reproduction, is transferred from a magnetic transfer master carrier. A magnetic field is applied to a conjoined body, formed by the master carrier bearing a transfer pattern corresponding to desired information and a discoid transfer medium. A magnetic transfer apparatus that includes magnetic field applying means having magnetic poles that extend from the interior to the outer periphery of the conjoined body, and rotating means for relatively rotating the conjoined body with respect to the magnetic poles is employed. The magnetic poles are provided such that a distance d, between end surfaces of the magnetic poles and the conjoined body decrease from the interior to the outer periphery of the conjoined body. Magnetic transfer is performed employing the magnetic field, the intensity of which increases from the interior to the outer periphery of the transfer medium.

摘要翻译： 从磁传输主载波传送在信号再现期间不发生由子脉冲引起的误差的磁图。 将磁场施加到由承载具有对应于期望信息的传送图案的主载体形成的结合体和盘状转印介质。 采用磁性传送装置，其包括具有从结合体的内部延伸到外周的磁极的磁场施加装置，以及用于使结合体相对于磁极相对旋转的旋转装置。 磁极设置成使得磁极端面和结合体之间的距离d从结合体的内部到外周减小。 使用磁场进行磁转移，其强度从转印介质的内部至外周增加。

公开(公告)号：US07236317B2

公开(公告)日：2007-06-26

申请号：US09843889

申请日：2001-04-30

申请人： Masakazu Nishikawa

发明人： Masakazu Nishikawa

IPC分类号： G11B5/86

CPC分类号： G11B5/865

摘要： A magnetic transfer method for transferring a magnetic recording information on a master carrier for magnetic transfer to a slave medium by bringing the master carrier for magnetic transfer with a magnetic layer with magnetic recording information recorded thereon into close contact with the slave medium where the information is to be transferred, whereby initial DC magnetization is performed on the slave medium in advance in track direction, and using a magnetic material having a product (Ms·δ) of saturation magnetization (Ms) and magnetic layer thickness (δ) within the range of 0.025 T·μm (20 G·μm)–2.3 T·μm (1830 G·μm) inclusive as the master carrier for magnetic transfer, the slave medium after the initial DC magnetization is brought into close contact with the master carrier, and a magnetic field for transfer is applied in a direction opposite to the direction of the initial DC magnetization of the slave surface, and magnetic transfer is performed.

摘要翻译： 一种磁转移方法，用于通过将具有记录在其中的磁记录信息的磁性层通过磁性传递的主载体与从属介质紧密接触的从属介质将信息传送到主介质上的磁记录信息传送到从属介质 从而在从动介质上预先在轨道方向上进行初始的DC磁化，并且使用具有饱和磁化强度（Ms）和磁性层厚度（delta）的乘积（Msdelta）的磁性材料在 0.025 T.mum（20G.mum）-2.3Tmum（1830G.Mum）作为用于磁转移的主载波，初始DC磁化之后的从属介质与主载体紧密接触，并且 用于传送的磁场沿与从表面的初始DC磁化方向相反的方向施加，并且执行磁转移。

公开(公告)号：US07190538B2

公开(公告)日：2007-03-13

申请号：US11366404

申请日：2006-03-03

申请人： Masakazu Nishikawa ,  Naoto Fujiwara

发明人： Masakazu Nishikawa ,  Naoto Fujiwara

IPC分类号： G11B5/02 ,  G11B3/70 ,  B28B7/38

CPC分类号： B82Y10/00 ,  G11B5/743 ,  G11B5/82 ,  G11B5/865 ,  G11B33/10 ,  Y10T428/31808

摘要： In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred to a magnetic recording medium, and a magnetic layer formed on the transfer-recording pattern of the support, the in-plane distance L (mm) between the hill and the valley of the warped master carrier, the vertical-direction distance H (μm) between the two, and the thickness d (mm) of the master carrier are so defined that they satisfy a relation of 0.05≦H·d3/L≦0.6.

公开(公告)号：US07139140B2

公开(公告)日：2006-11-21

申请号：US10078535

申请日：2002-02-21

申请人： Kazunori Komatsu ,  Masakazu Nishikawa

发明人： Kazunori Komatsu ,  Masakazu Nishikawa

IPC分类号： G11B5/86

CPC分类号： G11B5/865 ,  G11B5/59633 ,  G11B5/82

摘要： When executing a magnetic transfer by bringing a master medium and a slave medium into close contact with each other and applying a transferring magnetic field, a permitted limit of the application direction of the transferring magnetic field is defined so that magnetic patterns can be accurately transferred. A slave medium 2 is previously initial DC magnetized in a track direction by applying a magnetic field to the slave medium in the track direction of a slave surface, and when executing a magnetic transfer by bringing the master medium 3 and the slave medium 2 into close contact with each other and applying the transferring magnetic field in the track direction of the slave surface, the application angle α of the transferring magnetic field is defined within a range of ±30° in a vertical direction with respect to the slave surface. Furthermore, the application angle of the transferring magnetic field is defined within a range of ±30° with respect to the track direction on a plane parallel to the slave surface.

公开(公告)号：US07054081B2

公开(公告)日：2006-05-30

申请号：US11121935

申请日：2005-05-05

申请人： Masakazu Nishikawa ,  Kazuhiro Niitsuma ,  Akito Kamatani

发明人： Masakazu Nishikawa ,  Kazuhiro Niitsuma ,  Akito Kamatani

IPC分类号： G11B5/86

CPC分类号： B82Y10/00 ,  G11B5/59633 ,  G11B5/743 ,  G11B5/82 ,  G11B5/865 ,  Y10T428/12465 ,  Y10T428/32

摘要： By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and slave medium is in confronted close contact and received within a holder, inferiority of transfer such as omission of signals is prevented and quality of transfer signals is enhanced.The magnetic transfer apparatus executes magnetic transfer by applying transfer magnetic field by means of a magnetic field applying apparatus 5 after a master carrier 3, 4 bearing transfer information and a slave medium 2 to be transferred are brought into confronted close contact and received within a holder 10, wherein said holder 10 has a substantially circular shape and in particular, the circularity of holder is not less than 98%, wherein the flexural rigidity=Ed3/12 determined by Young's modulus E and thickness d of the holder is in the range of 0.1˜30 kN·m2 when the width of close contact area between the slave medium and master carrier is defined as 1 m, and wherein the practical thickness of the holder is not less than 3 mm and not more than 15 mm.

摘要翻译： 通过在主载体和从属介质紧密接触并接收在载体内的状态下，通过施加传递磁场来使主载体和从属介质与均匀的力紧密接触，从而传递的传递如 防止信号的省略，并且提高传输信号的质量。 磁传送装置通过在主载体3,4之间施加转移磁场来执行磁转移，主载体3,4之间的轴承转移信息和待传送的从属介质2被紧密接触并接收在保持器内 如图10所示，其中所述保持器10具有大致圆形形状，特别地，保持器的圆形度不小于98％，其中由杨氏模量E和厚度d确定的弯曲刚度= Ed 3/12 当从属介质和主载体之间的紧密接触面积的宽度被定义为1m时，保持器的范围在0.1〜30kN.m 2范围内，并且其中保持器的实际厚度 不小于3mm且不大于15mm。

公开(公告)号：US06906875B2

公开(公告)日：2005-06-14

申请号：US10144024

申请日：2002-05-14

申请人： Akito Kamatani ,  Masakazu Nishikawa ,  Makoto Nagao ,  Kazunori Komatsu ,  Tsuneo Inui ,  Kazuhiro Niitsuma

发明人： Akito Kamatani ,  Masakazu Nishikawa ,  Makoto Nagao ,  Kazunori Komatsu ,  Tsuneo Inui ,  Kazuhiro Niitsuma

IPC分类号： G11B5/00 ,  G11B5/86 ,  G11B23/50

CPC分类号： G11B5/865 ,  G11B23/505 ,  G11B2005/001

摘要： A magnetic transfer device for bringing a master carrier with information and a slave medium into intimate contact with each other and then applying a transfer field to transfer the information to the slave medium. The master carrier has an inclined face on its radially outer end. After the magnetic transfer of the information, claws are inserted in the gas formed by the inclined face of the master carrier and the slave medium. The slave medium held in intimate contact with the master carrier is separated from the master carrier by lifting the slave medium with the claws.

摘要翻译： 一种用于使具有信息的主载波与从属介质彼此紧密接触，然后施加传送场以将信息传送到从属介质的磁传输装置。 主托架在其径向外端具有倾斜面。 在信息的磁传递之后，将爪插入由主载体和从属介质的倾斜面形成的气体中。 与主托架保持紧密接触的从属介质通过用爪提起从属介质与主托架分离。

公开(公告)号：US06865038B2

公开(公告)日：2005-03-08

申请号：US09994891

申请日：2001-11-28

申请人： Masakazu Nishikawa ,  Makoto Nagao

发明人： Masakazu Nishikawa ,  Makoto Nagao

IPC分类号： G11B5/596 ,  G11B5/84 ,  G11B5/86 ,  G11B23/50

CPC分类号： G11B5/865 ,  G11B5/596 ,  G11B5/84 ,  G11B23/505

摘要： In the magnetic transferring method for magnetically transferring an information signal such as a servo signal from the master medium to the slave medium, when magnetic transfer is performed by bringing a master medium and a slave medium into close contact with each other, the master medium bearing an information signal and the slave medium having a lubricating layer formed on the surface of its recording plane during use, and applying a transfer magnetic field, the magnetic transfer is performed by bringing the slave medium before the formation of the lubricating layer and the master medium into close contact with each other. Thus, the separation of the slave medium from the master medium after the magnetic transfer is facilitated, and the adsorption of dust on the slave medium is prevented.

摘要翻译： 在用于将诸如伺服信号的信息信号从主介质磁传送到从属介质的磁转移方法中，当通过使主介质和从属介质彼此紧密接触进行磁传输时，主介质轴承 信息信号和从属介质，其在使用期间在其记录面的表面上形成有润滑层，并施加转移磁场，通过在形成润滑层和主介质之前使从属介质进行磁转移 彼此紧密接触。 因此，便于磁传送后从属介质与主介质的分离，并且防止灰尘在从属介质上的吸附。

公开(公告)号：US20050041314A1

公开(公告)日：2005-02-24

申请号：US10958327

申请日：2004-10-06

申请人： Masakazu Nishikawa ,  Kazuhiro Niitsuma ,  Tadashi Yasunga ,  Toshihiro Usa ,  Kazunori Komatsu

发明人： Masakazu Nishikawa ,  Kazuhiro Niitsuma ,  Tadashi Yasunga ,  Toshihiro Usa ,  Kazunori Komatsu

IPC分类号： G11B5/596 ,  G11B5/82 ,  G11B5/86

CPC分类号： B82Y10/00 ,  G11B5/59633 ,  G11B5/743 ,  G11B5/82 ,  G11B5/865 ,  Y10T428/273

摘要： A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern. The thickness da1 of the magnetic layer on the upper surface of a protruding portion of the irregularity pattern and the thickness da2 of the magnetic layer on each of the side surfaces of the protruding portion satisfy the following condition, 0.05

摘要翻译： 用于磁传递到平面内磁记录介质的主信息载体包括具有表示要传送到平面内磁记录介质的信息的不规则图案的基片和沿着不规则图案形成的磁性层。 不规则图案的突出部分的上表面上的磁性层的厚度da1和突出部分的每个侧表面上的磁性层的厚度da2满足以下条件：0.05

公开(公告)号：US06833173B1

公开(公告)日：2004-12-21

申请号：US09670616

申请日：2000-09-27

申请人： Masakazu Nishikawa ,  Makoto Nagao

发明人： Masakazu Nishikawa ,  Makoto Nagao

IPC分类号： G11B566

CPC分类号： G11B5/732 ,  G11B5/656 ,  G11B5/7325 ,  Y10T428/2495 ,  Y10T428/265 ,  Y10T428/266 ,  Y10T428/269 ,  Y10T428/31721 ,  Y10T428/31725

摘要： A magnetic recording medium, which comprises a flattening layer with a thickness of 0.1-5.0 &mgr;m, a seed layer, a nonmagnetic primer layer containing chromium with a chromium concentration of 77-100 atom %, a Co—Cr type alloy magnetic layer, a protective layer, and a lubricating layer coated sequentially on at least one of the surfaces of a flexible nonmagnetic support member, whereby the seed layer is designed in such a manner that the linear expansion coefficient (ESE) of the seed layer and the linear expansion coefficient (EUL) of the nonmagnetic primer layer satisfy the relation: |ESE−EUL|/EUL 1.

摘要翻译： 一种磁记录介质，其包括厚度为0.1-5.0μm的压平层，种子层，含铬浓度为77-100原子％的铬的非磁性底漆层，Co-Cr型合金磁性层， 保护层和润滑层，其依次涂覆在柔性非磁性支撑构件的至少一个表面上，由此种子层被设计成使种子层的线性膨胀系数（ESE）和线性膨胀系数 （EUL）满足关系：| ESE-EUL | / EUL <0.3，种子层的拉伸强度（SSE）和非磁性底漆层的拉伸强度（SUL）满足关系式：SSE / SUL> 1。

公开(公告)号：US06636371B1

公开(公告)日：2003-10-21

申请号：US09558326

申请日：2000-04-26

申请人： Kazunori Komatsu ,  Makoto Nagao ,  Masakazu Nishikawa

发明人： Kazunori Komatsu ,  Makoto Nagao ,  Masakazu Nishikawa

IPC分类号： G11B586

CPC分类号： G11B5/865

摘要： The invention provides a magnetic transfer method in which a magnetic transfer master carrier having a magnetic layer at a surface portion of a substrate having an information signal is brought in contact with a magnetic recording medium that is an associated slave medium and a transfer magnetic field is applied to the slave medium. The coercive force Hcs of the slave magnetic recording medium and the transfer magnetic field satisfies the relation: 0.6×Hcs≦transfer magnetic field≦1.3×Hcs

摘要翻译： 本发明提供一种磁转移方法，其中在具有信息信号的基板的表面部分具有磁性层的磁转移主载体与作为相关联的从动介质的磁记录介质和转印磁场接触 应用于从属媒体。 从属磁记录介质的矫顽力Hcs和转移磁场满足关系：0.6xHcs <=传递磁场<= 1.3XHCS