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    Method for preparing ferromagnetic metal particles
    4.
    发明授权
    Method for preparing ferromagnetic metal particles 失效
    制备铁磁性金属颗粒的方法

    公开(公告)号：US4487627A

    公开(公告)日：1984-12-11

    申请号：US547618

    申请日：1983-11-01

    申请人： Shizuo Umemura ,  Tatsuji Kitamoto

    发明人： Shizuo Umemura ,  Tatsuji Kitamoto

    IPC分类号： G11B5/706 ,  B22F1/02 ,  B22F9/22 ,  C09D5/23 ,  C09D7/12 ,  H01F1/06

    CPC分类号： B22F1/02 ,  B22F9/22 ,  H01F1/065

    摘要： A method for preparing ferromagnetic metal particles is disclosed. The method involves dehydrating oxyhydroxide particles comprised mainly of iron in a nonreducing gas under heating at a temperature of not more than 500.degree. C. to form oxide particles, providing silicon compounds on the surface of oxide particles, and reducing the oxide particles in a reducing gas under heating. The ferromagnetic metal particles provided have good acicular shape and a large specific surface area.

    摘要翻译： 公开了制备铁磁性金属颗粒的方法。 该方法包括在非还原性气体中，在不降低500℃的温度下，在非还原性气体中脱氢形成主要由铁组成的羟基氧化物颗粒，形成氧化物颗粒，在氧化物颗粒的表面上提供硅化合物，还原氧化物颗粒的还原 气体在加热。 所提供的铁磁性金属颗粒具有良好的针状和比表面积。

    Ferromagnetic particles with stable magnetic characteristics and method of preparing same
    5.
    发明授权
    Ferromagnetic particles with stable magnetic characteristics and method of preparing same 失效
    具有稳定磁特性的铁磁颗粒及其制备方法

    公开(公告)号：US4608093A

    公开(公告)日：1986-08-26

    申请号：US771073

    申请日：1985-08-30

    申请人： Shizuo Umemura ,  Tatsuji Kitamoto

    发明人： Shizuo Umemura ,  Tatsuji Kitamoto

    IPC分类号： G11B5/706 ,  B22F1/02 ,  C09D5/23 ,  C09D7/12 ,  H01F1/06 ,  H01F1/09 ,  C23C8/14

    CPC分类号： H01F1/061 ,  H01F1/09 ,  Y10S428/90 ,  Y10T428/2991

    摘要： Cobalt-free ferromagnetic particles are disclosed. The particles are comprised of ferromagnetic metal inner cores and an outer oxidized layer. The particles have a saturation magnetization of 60 to 100 emu/g and a coercive force of 500 Oe or more. The outer layer provides a means for stabilizing the magnetic characteristics of the particles at temperatures not higher than 80.degree. C. in air. The particles are produced by gradually oxidizing ferromagnetic metal particles containing no cobalt in oxygen-containing gas such that the surface-oxidized metal particles have a saturation magnetization of 60 to 100 emu/g. The particles provided have good magnetic characteristics which are maintained with the passage of time even when the particles are subjected to adverse temperature and humidity conditions.

    摘要翻译： 公开了无钴铁磁颗粒。 颗粒由铁磁性金属内芯和外部氧化层组成。 颗粒的饱和磁化强度为60〜100emu / g，矫顽力为500Oe以上。 外层提供了在空气中不高于80℃的温度下稳定颗粒的磁特性的方法。 通过在含氧气体中逐渐氧化不含钴的铁磁性金属颗粒，使得表面氧化金属颗粒具有60至100emu / g的饱和磁化强度来制备颗粒。 所提供的颗粒具有良好的磁特性，即使当颗粒经受不利的温度和湿度条件时，其也保持随时间的流逝。

    Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder
    6.
    发明授权
    Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder 失效
    制备铁磁性金属粉末的方法和包括该粉末的磁记录介质

    公开(公告)号：US4481253A

    公开(公告)日：1984-11-06

    申请号：US448651

    申请日：1982-12-10

    申请人： Akihiro Matsufuji ,  Shizuo Umemura ,  Akira Kasuga ,  Hajime Miyatuka ,  Goro Akashi

    发明人： Akihiro Matsufuji ,  Shizuo Umemura ,  Akira Kasuga ,  Hajime Miyatuka ,  Goro Akashi

    IPC分类号： B22F9/22 ,  G11B5/706 ,  H01F1/06 ,  H01F10/02

    CPC分类号： B22F9/22 ,  G11B5/70615 ,  H01F1/065 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/266 ,  Y10T428/31678

    摘要： A process for preparing a ferromagnetic metal powder and a magnetic recording medium utilizing that powder are disclosed. The ferromagnetic metal powder is prepared by heat-treating an acicular iron oxyhydroxide or an acicular iron oxide powder prepared from the acicular iron oxyhydroxide in a non-reducing gas at a temperature of from 300.degree. C. to 1000.degree. C. or in a reducing gas at a temperature of from 150.degree. C. to 500.degree. C. The heat-treated material is washed and then reduced under heating. The ferromagnetic metal powder prepared in this manner is dispersed in a binder and cated on a non-magnetic base to form a magnetic recording medium. By utilizing the washing step followed by heat-treating preparing the ferromagnetic metal powder a large amount of water soluble impurities are removed from the metal powder. The metal powder produced according to this disclosed process as excellent oxidation stability and ability to resist corrosion. Accordingly, the magnetic recording medium prepared utilizing this powder has an excellent ability to resist oxidation and corrosion even when subjected to adverse conditions.

    摘要翻译： 公开了一种制备铁磁金属粉末和利用该粉末的磁记录介质的方法。 通过在300〜1000℃的温度或非还原性气体中以非还原性气体热处理由针状羟基氧化铁制成的针状羟基氧化铁或针状氧化铁粉末，制备强磁性金属粉末。 在150〜500℃的温度下进行气体洗涤。将热处理材料洗涤，然后在加热下还原。 以这种方式制备的铁磁性金属粉末分散在粘合剂中并在非磁性基底上形成磁记录介质。 通过利用洗涤步骤进行热处理，制备铁磁性金属粉末，从金属粉末中除去大量的水溶性杂质。 根据该公开方法制备的金属粉末具有优异的氧化稳定性和耐腐蚀性。 因此，利用这种粉末制备的磁记录介质即使在不利条件下也具有优异的抵抗氧化和腐蚀的能力。

    Image recording device and optical fiber
    7.
    发明授权
    Image recording device and optical fiber 失效
    图像记录装置和光纤

    公开(公告)号：US06519387B1

    公开(公告)日：2003-02-11

    申请号：US09560295

    申请日：2000-04-27

    申请人： Hiroshi Sunagawa ,  Shizuo Umemura

    发明人： Hiroshi Sunagawa ,  Shizuo Umemura

    IPC分类号： G02B632

    CPC分类号： G02B6/4206

    摘要： An image recording device and an optical fiber are provided which can obtain scanned beam spots having configurations which extend in an elongated manner in a subscanning direction and which are rectangular, and which are suitably used for recording onto a heat-mode-type photosensitive recording material. The image recording device records an image by illuminating a light beam outputted from an exposure head which is connected to a semiconductor laser unit via an optical fiber. In the image recording device, the optical fiber is an optical fiber having a core whose cross-sectional configuration in a direction intersecting an optical axis of the light beam is an elongated and a rectangular configuration. An image is focused by a focusing lens such that a short width direction of a light beam emitted from a light exit portion of the optical fiber is oriented in a main scanning direction on a recording medium.

    摘要翻译： 提供一种图像记录装置和光纤，其可以获得具有在副扫描方向上以细长方式延伸的矩形的扫描束斑，并且适合用于记录在热模式型感光记录材料 。 图像记录装置通过经由光纤照射从连接到半导体激光单元的曝光头输出的光束来记录图像。 在图像记录装置中，光纤是具有与光束的光轴相交的方向的截面形状为长方形构造的芯的光纤。 通过聚焦透镜聚焦图像，使得从光纤的光出射部分发射的光束的宽度方向的短度方向在记录介质上的主扫描方向上取向。

    Magneto-optical thin film
    8.
    发明授权
    Magneto-optical thin film 失效
    磁光薄膜

    公开(公告)号：US4983025A

    公开(公告)日：1991-01-08

    申请号：US304651

    申请日：1989-02-01

    申请人： Shizuo Umemura

    发明人： Shizuo Umemura

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G02F1/09

    CPC分类号： G11B11/10593

    摘要： A magneto-optical thin film comprising a substrate having thereon at least two ferromagnetic thin layers alternating with at least two dielectric thin layers to form a laminate the ferromagnetic thin layers each having a thickness of from 30 to 260 .ANG..

    摘要翻译： 一种磁光薄膜，其包括其上具有至少两个与至少两个电介质薄层交替的铁磁薄层的基板，以形成各自具有30至260安培的厚度的铁磁薄层。

    Method of forming ultrafine patterns
    9.
    发明授权
    Method of forming ultrafine patterns 失效
    形成超细图案的方法

    公开(公告)号：US4713258A

    公开(公告)日：1987-12-15

    申请号：US752208

    申请日：1985-07-03

    申请人： Shizuo Umemura

    发明人： Shizuo Umemura

    IPC分类号： C23C14/04 ,  C23C16/04 ,  G03F7/004 ,  G03F7/20 ,  H01L21/203 ,  H01L21/285 ,  H01L21/31 ,  B05D3/06

    CPC分类号： G03F7/2059 ,  C23C16/047 ,  G03F7/004

    摘要： A method of forming an ultrafine pattern, said method comprising selectively forming adsorption sites on a substrate surface by irradiation with a focused electron beam in a vacuum and then depositing a pattern-forming substance onto the substrate by vacuum vapor deposition, chemical vapor deposition, sputtering or other suitable deposition methods, thereby forming the aimed ultrafine patterns. The method can provide ultrafine patterns in a very high resolution or precision by means of an electron beam irradiation and deposition technique under carefully controlled process conditions and, particularly, the electron beam irradiation in the presence of oil gas results in a better quality of pattern.

    摘要翻译： 一种形成超细纹图案的方法，所述方法包括通过在真空中照射聚焦电子束在衬底表面上选择性地形成吸附位点，然后通过真空气相沉积，化学气相沉积，溅射在衬底上沉积图案形成物质 或其它合适的沉积方法，从而形成目标超细纹图案。 该方法可以在精心控制的工艺条件下通过电子束照射和沉积技术以非常高的分辨率或精度提供超细图案，特别是在油气存在下的电子束照射导致更好的图案质量。