公开(公告)号：US06479131B1

公开(公告)日：2002-11-12

申请号：US09596345

申请日：2000-06-19

申请人： Kiyomi Ejiri ,  Koji Naoe ,  Masahiko Mori

发明人： Kiyomi Ejiri ,  Koji Naoe ,  Masahiko Mori

IPC分类号： G11B5733

CPC分类号： G11B5/738 ,  Y10T428/24355 ,  Y10T428/2495 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/2982

摘要： Disclosed is a magnetic recording medium exhibiting a high C/N ratio in high-density magnetic recording. The magnetic recording medium has, on a flexible nonmagnetic support, at least a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder on the nonmagnetic layer, where the magnetic layer has an average thickness d in the range of from 0.01 to 0.3 &mgr;m, said nonmagnetic powder has an acicular shape, and the ratio of a mean length L of the major axis of the nonmagnetic powder to an average thickness D of said nonmagnetic layer satisfies the relationship of 1/10≦L/D≦2.

摘要翻译： 公开了在高密度磁记录中表现出高C / N比的磁记录介质。 磁性记录介质在柔性非磁性载体上至少包含非磁性粉末和粘合剂的非磁性层和在非磁性层上含有铁磁粉末和粘合剂的磁性层，其中磁性层的平均厚度d在 0.01〜0.3μm的范围，所述非磁性粉末具有针状，非磁性粉末的长轴的平均长度L与所述非磁性层的平均厚度D的比例满足1/10 < = L / D <= 2。

公开(公告)号：US06475598B1

公开(公告)日：2002-11-05

申请号：US09602225

申请日：2000-06-23

申请人： Koji Naoe ,  Kiyomi Ejiri ,  Masahiko Mori

发明人： Koji Naoe ,  Kiyomi Ejiri ,  Masahiko Mori

IPC分类号： G11B568

CPC分类号： B82Y15/00 ,  G11B5/7085 ,  G11B5/7305 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24975 ,  Y10T428/25 ,  Y10T428/265

摘要： The present invention provides a magnetic recording medium exhibiting a high C/N ratio as well as having excellent running durability even under high-density magnetic recording. Disclosed is a magnetic recording medium comprising, on either side of a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order, having an average thickness of said magnetic layer of from 0.01 to 0.3 &mgr;m and a total average thickness of said magnetic layer and said nonmagnetic layer of from 0.1 to 1.0 &mgr;m, characterized in that the number of projections having a height equal to or higher than 20 nm on the magnetic layer surface measured with AFM (Atomic Force Microscope) is equal to or less than 100 pieces per 30 &mgr;m×30 &mgr;m square as well as the PSD (Power Spectrum Density) of the magnetic layer surface measured with the AFM is equal to or less than 0.2 nm2 in the wavelength of from of 1 to 5 &mgr;m.

摘要翻译： 本发明提供了一种表现出高C / N比的磁记录介质，并且即使在高密度磁记录下也具有优异的运行耐久性。公开了一种磁记录介质，其在柔性非磁性载体的任一侧上包含非磁性层 含有非磁性粉末和粘合剂以及含有铁磁性粉末和粘合剂的磁性层，所述磁性层的平均厚度为0.01〜0.3μm，所述磁性层和所述非磁性层的总平均厚度为 0.1〜1.0μm，其特征在于，使用AFM（原子力显微镜）测定的磁性层表面上的高度等于或大于20nm的突起的数量等于或小于每30mum×30μm的正方形100个 以及用AFM测量的磁性层表面的PSD（功率谱密度）在1至5的波长中等于或小于0.2nm 2 妈妈

公开(公告)号：US06521361B2

公开(公告)日：2003-02-18

申请号：US09828767

申请日：2001-04-09

申请人： Kiyomi Ejiri ,  Masahiko Mori

发明人： Kiyomi Ejiri ,  Masahiko Mori

IPC分类号： B32B516

CPC分类号： G11B5/70678 ,  G11B5/733

摘要： A magnetic recording medium having on a flexible, nonmagnetic support, in order, a lower layer comprising a nonmagnetic powder and a binder, and a magnetic layer comprising a ferromagnetic powder and a binder. The average thickness d of the magnetic layer is 0.02-0.2 &mgr;m. The ferromagnetic powder contained in the magnetic layer is a platelike hexagonal ferrite magnetic powder with a mean plate diameter of not more than 40 nm. The nonmagnetic powder contained in the lower layer is an acicular inorganic powder with a mean main axis length of not more than 0.2 &mgr;m. Further, the plate ratio of the ferromagnetic powder is not greater than the acicular ratio of the lower layer inorganic powder. A particulate magnetic recording material exhibiting a high C/N in high-density magnetic recording, particularly in reproduction with MR heads is provided.

摘要翻译： 一种磁性记录介质，其具有柔性非磁性载体，依次包含非磁性粉末和粘合剂的下层，以及包含铁磁性粉末和粘合剂的磁性层。 磁性层的平均厚度d为0.02-0.2μm。 包含在磁性层中的铁磁性粉末是平板直径不大于40nm的板状六角铁氧体磁性粉末。 包含在下层中的非磁性粉末是平均主轴长度不大于0.2μm的针状无机粉末。 此外，铁磁粉末的板比不大于下层无机粉末的针状比。 提供了在高密度磁记录中表现出高C / N的微粒磁记录材料，特别是在具有MR磁头的再现中。

公开(公告)号：US06905753B2

公开(公告)日：2005-06-14

申请号：US09943229

申请日：2001-08-30

申请人： Masahiko Mori ,  Kiyomi Ejiri

发明人： Masahiko Mori ,  Kiyomi Ejiri

IPC分类号： G11B5/70 ,  G11B5/706 ,  G11B5/708 ,  G11B5/714 ,  H01F1/047

CPC分类号： G11B5/7085 ,  G11B5/714 ,  Y10T428/24355 ,  Y10T428/256 ,  Y10T428/265

摘要： Provided is a particulate magnetic recording medium having good durability and a high C/N ratio in high-density magnetic recording (particularly when employing an MR head for reproduction). A magnetic recording medium which comprises a lower layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder, an abrasive and a binder provided in this order on a nonmagnetic flexible support. The magnetic layer has a mean thickness d ranging from 0.01 to 0.1 μm, the ferromagnetic powder contained in the magnetic layer is an acicular ferromagnetic alloy powder having the mean major axis length equal to or less than 0.1 μm and the saturation magnetization σs equal to or less than 120 A·m2/kg, and the number of abrasive protrusions ranging in height from 5 to 10 nm on the surface of the magnetic layer ranges from 15 to 25/225 μm2.

摘要翻译： 提供了一种在高密度磁记录中（特别是当使用用于再现的MR磁头）时具有良好的耐久性和高C / N比的颗粒状磁记录介质。 一种磁记录介质，其包括由非磁性粉末和粘合剂构成的下层，以及包含铁磁性粉末，研磨剂和粘合剂的磁性层，该磁性层按顺序设置在非磁性柔性载体上。 磁性层的平均厚度d为0.01〜0.1μm，磁性层中含有的铁磁性粉末为平均长轴长度等于或小于0.1μm的针状铁磁性合金粉末，饱和磁化强度等于或等于 小于120Am 2 / kg，在磁性层表面上的高度为5〜10nm的研磨性突起的数量为15〜25 /225μm2， SUP>。

公开(公告)号：US06497948B2

公开(公告)日：2002-12-24

申请号：US09821496

申请日：2001-03-29

申请人： Kiyomi Ejiri ,  Masahiko Mori

发明人： Kiyomi Ejiri ,  Masahiko Mori

IPC分类号： G11B5706

CPC分类号： G11B5/714 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/265

摘要： The present invention aims to provide a particulate magnetic recording medium showing a high C/N in high-density magnetic recording (especially using an MR head for reproducing). Herein disclosed is a magnetic recording medium comprising a lower layer containing a nonmagnetic powder and a binder provided on a nonmagnetic flexible substrate and a magnetic layer containing a ferromagnetic powder and a binder provided thereon wherein said magnetic layer has an average thickness d of 0.01-0.1 &mgr;m, the ferromagnetic powder contained in said magnetic layer is an acicular ferromagnetic alloy powder having an average major axis length of 0.1 &mgr;m or less and a as of 120 A.m2/kg (120 emu/g) or less, the nonmagnetic powder contained in said lower layer is an acicular inorganic powder having an average major axis length of 0.15 &mgr;m or less, and said ferromagnetic powder has an aspect ratio equal to or smaller than the aspect ratio of said acicular inorganic powder.

摘要翻译： 本发明的目的在于提供一种在高密度磁记录（特别是使用用于再现的MR磁头）中具有高C / N的微粒磁记录介质。此外，公开了一种磁记录介质，其包含含有非磁性粉末和 提供在非磁性柔性基板上的粘合剂和含有铁磁粉末和粘合剂的磁性层，其中所述磁性层的平均厚度d为0.01-0.1μm，所述磁性层中所含的铁磁性粉末是具有 平均长轴长度为0.1μm以下，a为120A·m 2 / kg（120emu / g）以下，所述下层中所含的非磁性粉末为平均长轴长度为0.15的针状无机粉末 所述铁磁粉末的纵横比等于或小于所述针状无机粉末的纵横比。

公开(公告)号：US06558772B2

公开(公告)日：2003-05-06

申请号：US09885558

申请日：2001-06-20

申请人： Kiyomi Ejiri ,  Masahiko Mori

发明人： Kiyomi Ejiri ,  Masahiko Mori

IPC分类号： G11B5712

CPC分类号： G11B5/714 ,  G11B5/70678 ,  G11B5/842 ,  G11B5/855 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

摘要： Enclosed is a magnetic recording medium obtained by sequentially providing on a flexible nonmagnetic support a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder. The thickness of the magnetic layer is 0.01-0.1 &mgr;m and the ratio of the exposed area of nonmagnetic power on the surface of the magnetic layer is not greater than 10 percent. A method of manufacturing a magnetic recording medium comprising coating a nonmagnetic layer coating liquid on a flexible nonmagnetic support and applying a magnetic layer coating liquid on the coated layer while the coated layer is still wet. The ratio of the exposed area of nonmagnetic power on the surface of the magnetic layer is not greater than 10 percent; the nonmagnetic layer coating liquid has a yield stress of not less than 100 &mgr;N/cm2 or 10 dyne/cm2 and the solid component concentration of the magnetic layer coating liquid is greater than the solid component concentration of the nonmagnetic layer coating liquid. A particulate magnetic recording medium having a magnetic layer of not greater than 0.1 &mgr;m, good production properties, and good electromagnetic characteristics when used with MR heads is provided.

公开(公告)号：US06773788B2

公开(公告)日：2004-08-10

申请号：US10216849

申请日：2002-08-13

申请人： Masahiko Mori ,  Kiyomi Ejiri

发明人： Masahiko Mori ,  Kiyomi Ejiri

IPC分类号： G11B5706

CPC分类号： G11B5/70 ,  G11B5/70678 ,  G11B5/842 ,  Y10T428/257 ,  Y10T428/265

摘要： Provided is a magnetic recording medium exhibiting high C/N ratio and suited to high-density magnetic recording, particularly, to reproduction with MR heads. The magnetic recording medium comprises a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a flexible nonmagnetic support. The magnetic layer has an average thickness ranging from 0.02 to 0.2 &mgr;m, the ferromagnetic powder contained in the magnetic layer is a plate-shaped hexagonal ferrite ferromagnetic powder having an average plate diameter of 10 to 40 nm, the ratio of a volume of magnetic reversal to a volume of magnetic material particles is equal to or less than 3, the magnetic layer has a coercive force Hc equal to or higher than 159 kA/m, and components magnetically reversing in the magnetic field of 80 kA/m or less are less than 1 percent in the magnetization distribution of the magnetic layer.

摘要翻译： 本发明提供一种表现出高C / N比且适于高密度磁记录的磁记录介质，特别是用MR磁头再现。 磁性记录介质在柔性非磁性载体上依次包括非磁性粉末和粘合剂以及包含铁磁粉末和粘合剂的磁性层。 磁性层的平均厚度为0.02〜0.2μm，磁性层所含的铁磁性粉末为板状六方铁素体铁磁粉末，平均板直径为10〜40nm，磁性反转体积的比例 相对于一定体积的磁性材料粒子为3以下，磁性层的矫顽力Hc为159kA / m以上，在磁性方面为80kA / m以下的磁性反转成分较小 超过1％的磁性层的磁化分布。

公开(公告)号：US06482506B1

公开(公告)日：2002-11-19

申请号：US09648823

申请日：2000-08-25

申请人： Kiyomi Ejiri ,  Masahiko Mori

发明人： Kiyomi Ejiri ,  Masahiko Mori

IPC分类号： G11B5716

CPC分类号： G11B5/716 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/24975 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257

摘要： Provided is a particulate magnetic recording medium having excellent electromagnetic characteristics, especially, a particulate magnetic recording medium which achieves a high output and a low noise and which is suitable for reproduction with an MR head. A magnetic recording medium comprising a flexible nonmagnetic support having thereon, in order, a nonmagnetic layer containing a nonmagnetic powder and a binder and at least two magnetic layers including an uppermost magnetic layer and a lowermost magnetic layer, each containing a ferromagnetic powder and a binder, wherein said at least two magnetic layers have a total thickness of from 0.02 &mgr;m to 0.5 &mgr;m and an average particle volume V(u) and a saturation magnetization &sgr;s(u) of a ferromagnetic powder in said uppermost magnetic layer are, respectively, higher than an average particle volume V(L) and a saturation magnetization &sgr;s(L) of a ferromagnetic powder in said lowermost magnetic layer.

摘要翻译： 本发明提供一种具有优异电磁特性的微粒磁记录介质，特别是实现高输出和低噪声的微粒磁记录介质，适用于MR磁头再现。一种磁记录介质，包括其上具有柔性非磁性载体 按顺序，包含非磁性粉末和粘合剂的非磁性层和包含最高磁性层和最低磁性层的至少两个磁性层，每个磁性层都含有铁磁性粉末和粘合剂，其中所述至少两个磁性层具有总共 所述最高磁性层中的铁磁性粉末的平均粒子体积V（u）和饱和磁化强度s（u）分别高于平均粒子体积V（L）和 所述最低磁性层中的铁磁粉末的饱和磁化强度（L）。

公开(公告)号：US08229258B2

公开(公告)日：2012-07-24

申请号：US12585516

申请日：2009-09-16

申请人： Hiroshi Ishikawa ,  Toshifumi Hasama ,  Hitoshi Kawashima ,  Kenji Kintaka ,  Masahiko Mori ,  Hisato Uetsuka ,  Hiroyuki Tsuda ,  Keisuke Sorimoto

发明人： Hiroshi Ishikawa ,  Toshifumi Hasama ,  Hitoshi Kawashima ,  Kenji Kintaka ,  Masahiko Mori ,  Hisato Uetsuka ,  Hiroyuki Tsuda ,  Keisuke Sorimoto

IPC分类号： G02B6/26 ,  G02F2/00 ,  H04J14/00

CPC分类号： G02F1/31 ,  G02B6/12014 ,  G02B6/12016 ,  G02B6/12021 ,  G02B6/2713 ,  G02B6/2793 ,  G02B6/30 ,  G02B6/3548 ,  G02B6/356 ,  G02F2203/58 ,  G02F2203/585

摘要： An optical waveguide-type wavelength domain switch includes a waveguide-type multi/demultiplexing device laminate comprising three or more laminated waveguide-type multi/demultiplexing devices, a lens system positioned on a demultiplex side of the waveguide-type multi/demultiplexing device laminate, and a reflective optical phase-modulating cell positioned on an opposite side of the waveguide-type multi/demultiplexing device laminate to the lens system. The lens system includes a lens alignment composed of plural lenses in one-to-one correspondence with the waveguide-type multi/demultiplexing devices and having a light-collecting or collimating function in the lens-aligning direction, an image-magnifying optical system having an N:1 (N>1) image-magnifying function arranged on the optical phase-modulating cell side of the lens alignment, an f-f lens (Y) arranged on the optical phase-modulating cell side of the image-magnifying optical system, and having a light-collecting or collimating function in the same direction as the lens-aligning direction of the lens alignment, and an f-f lens (X) having a light-collecting or collimating function in a perpendicular direction to the lens-aligning direction of the lens alignment.

摘要翻译： 光波导型波长域开关包括：波导型多路解复用器件层叠体，其包含三个或更多个层叠波导型多路解复用器件，位于波导型多路解复用器件层叠体的解复用侧的透镜系统， 以及反射光学相位调制单元，其位于与所述透镜系统的所述波导型多路解复用器件层叠体的相反侧。 透镜系统包括由多个透镜组成的透镜对准，与波导型多路/多路分离装置一一对应，并且在透镜对准方向上具有聚光或准直功能，图像放大光学系统具有 配置在透镜对准的光学相位调制单元侧的N：1（N> 1）图像放大功能，配置在图像放大光学系统的光学相位调制单元侧的ff透镜（Y） 并且在与透镜对准方向的透镜对准方向相同的方向上具有聚光或准直功能，以及在与透镜对准方向垂直的方向上具有聚光或准直功能的ff透镜（X） 镜头对准。

公开(公告)号：US20110182545A1

公开(公告)日：2011-07-28

申请号：US13014151

申请日：2011-01-26

申请人： Hiroshi Ishikawa ,  Toshifumi Hasama ,  Hitoshi Kawashima ,  Kenji Kintaka ,  Masahiko Mori ,  Hisato Uetsuka ,  Hiroyuki Tsuda ,  Keisuke Sorimoto

发明人： Hiroshi Ishikawa ,  Toshifumi Hasama ,  Hitoshi Kawashima ,  Kenji Kintaka ,  Masahiko Mori ,  Hisato Uetsuka ,  Hiroyuki Tsuda ,  Keisuke Sorimoto

IPC分类号： G02B6/26

CPC分类号： G02B6/2773 ,  G02B6/12021 ,  G02B6/3594 ,  G02F1/313

摘要： To provide a waveguide type wavelength domain optical switch which makes it possible to use a cheap lens, makes it possible to correct aberration of the demultiplexed wavelengths produced in a plurality of waveguide type demultiplexing circuits, a wavelength domain optical switch is provided with: an integrated element formed by laminating three or more waveguide type demultiplexing circuits; a first lens for collecting light emitted from the integrated element; a polarization separation element for separating light emitted from the first lens into X polarization and Y polarization and emitting the X polarization and the Y polarization at different angles; a second lens for collecting the X polarization and the Y polarization; a first reflective optical phase modulator for reflecting the collected X polarization and Y polarization at any angles; a ½-wavelength plate disposed between the second lens and the first reflective optical phase modulator in order to make polarization directions of the X polarization and the Y polarization identical; and a second reflective optical phase modulator for inputting light from the first reflective optical phase modulator into one of the waveguide type demultiplexing circuits.

摘要翻译： 为了提供使得可以使用廉价透镜的波导型波长域光开关，可以校正在多个波导型解复用电路中产生的解复用波长的像差，波长域光开关具有：集成 通过层叠三个或更多个波导型解复用电路形成的元件; 用于收集从所述集成元件发射的光的第一透镜; 用于将从第一透镜发射的光分离成X偏振和Y偏振并以不同角度发射X偏振和Y偏振的偏振分离元件; 用于收集X偏振和Y偏振的第二透镜; 用于以任何角度反射所收集的X偏振和Y偏振的第一反射光学相位调制器; 设置在第二透镜和第一反射光学相位调制器之间的1/2波长板，以使X偏振和Y偏振的偏振方向相同; 以及第二反射光学相位调制器，用于将来自第一反射型光学相位调制器的光输入波导型解复用电路之一。