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11. 发明授权

US07851076B2 Method of fabricating silicon substrate for magnetic recording media, and magnetic recording medium 失效
标题翻译：制造用于磁记录介质的硅衬底和磁记录介质的方法
公开(公告)号：US07851076B2
公开(公告)日：2010-12-14
申请号：US12211379
申请日：2008-09-16
申请人： Ken Ohashi
发明人： Ken Ohashi
IPC分类号： G11B5/71 , G11B5/82 , H01L21/20
CPC分类号： G11B5/8404
摘要： In this invention, etching is not performed in the step of planarizing a polycrystalline Si wafer, but only mechanical grinding is performed for planarization. This is because, since the etching rate is crystal-face dependent, etching of the polycrystalline Si wafer unavoidably results in formation of steps due to different crystal face orientations of individual crystal grains exposed on a surface of the wafer, thus hindering precision surface planarization. Subsequently, the Si wafer surface is coated with an oxide film to form an Si wafer with oxide film prior to the final polishing stage and then a surface of the oxide film is planarized, to give a planar substrate (i.e., Si substrate with oxide film) having no step on the surface thereof.
摘要翻译：在本发明中，在平坦化多晶Si晶片的步骤中不进行蚀刻，而仅进行机械研磨以进行平面化。这是因为，由于蚀刻速率是晶面依赖的，所以多晶Si晶片的蚀刻不可避免地导致由于暴露在晶片表面上的各个晶粒的晶面取向不同而产生的步骤的形成，从而妨碍了精确的表面平坦化。随后，在最终抛光阶段之前，用氧化膜涂覆Si晶片表面以形成具有氧化膜的Si晶片，然后使氧化膜的表面平坦化，得到平面基板（即，具有氧化膜的Si衬底）在其表面上没有台阶。

12. 发明授权

US07713360B2 Rare earth permanent magnet 有权
标题翻译：稀土永磁铁
公开(公告)号：US07713360B2
公开(公告)日：2010-05-11
申请号：US11062961
申请日：2005-02-22
申请人： Ken Ohashi
发明人： Ken Ohashi
IPC分类号： H01F1/053
CPC分类号： H01F1/0596 , B22F2998/00 , B22F2999/00 , C22C1/0441 , C22C38/005 , H01F1/0536 , H01F1/0557 , B22F9/04 , B22F3/02 , B22F3/10 , B22F2202/05
摘要： It is an object of the present invention to provide a permanent magnet which is observed as a uniform structure without microstructures, but shows a pinning type initial magnetization curve. There is provided a rare earth permanent magnet comprising a magnetic intermetallic compound comprising R, T, N and an unavoidable impurity, wherein R is one or more rare earth elements comprising Y, T is two or more transition metal elements and comprises principally Fe and Co; wherein the magnetic intermetallic compound has an T/R atomic ratio of 6 to 14; a magnetocrystalline anisotropy energy of at least 1 MJ/m3; a Curie point of at least 100° C.; average particle diameter of at least 3 μm; and a substantially uniform structure; wherein the rare earth permanent magnet has a structure that gives a pinning-type initial magnetization curve; and wherein the magnetic intermetallic compound has a Th2Zn17-type structure, and the like.
摘要翻译：本发明的目的是提供一种永久磁铁，其被观察为没有微结构的均匀结构，但是示出了钉扎型初始磁化曲线。提供了包含由R，T，N和不可避免的杂质组成的磁性金属间化合物的稀土永磁体，其中R是一种或多种包含Y的稀土元素，T是两种或更多种过渡金属元素，并且主要包括Fe和Co ; 其中所述磁性金属间化合物的T / R原子比为6〜14; 至少1 MJ / m3的磁晶各向异性能; 居里点至少为100°C。平均粒径至少为3μm; 和基本均匀的结构; 其中所述稀土永磁体具有给出钉扎型初始磁化曲线的结构; 并且其中所述磁性金属间化合物具有Th2Zn17型结构等。

13. 发明申请

US20070231607A1 Substrate for magnetic recording medium, fabrication method thereof, and magnetic recording medium 审中-公开
标题翻译：用于磁记录介质的基板，其制造方法和磁记录介质
公开(公告)号：US20070231607A1
公开(公告)日：2007-10-04
申请号：US11723228
申请日：2007-03-19
申请人： Masaru Ito , Ken Ohashi
发明人： Masaru Ito , Ken Ohashi
IPC分类号： G11B5/66 , G11B5/706 , B05D1/18
CPC分类号： G11B5/667 , G11B5/7325 , G11B5/8404 , G11B5/858
摘要： A soft magnetic under layer (SUL) is formed on a non-magnetic substrate by an electroless plating method. The SUL formed by plating is subjected to magnetic field heat treatment on conditions that the heat treatment temperature is 150° C. to 350° C., a magnetic field applied to the substrate has a strength of 50 oersteds (Oe) or more, and the treatment time is selected within a range of five minutes to ten hours. Through the magnetic field heat treatment, magnetic anisotropy is obtained with a difference (δH=Hd−Hc) of 5 oersteds (Oe) or more in terms of absolute value between a magnetization saturation magnetic field strength (Hd) in the in-plane radial direction of a soft magnetic film and a magnetization saturation magnetic field strength (Hc) in the in-plane circumferential direction of the soft magnetic film, and the magnetic anisotropy is symmetric with respect to the axis of the substrate.
摘要翻译：通过无电镀法在非磁性基板上形成软磁性层（SUL）。通过电镀形成的SUL在热处理温度为150℃〜350℃的条件下进行磁场热处理，施加到基板的磁场的强度为50奥斯特（Oe）以上，治疗时间在5分钟至10小时的范围内选择。通过磁场热处理，获得磁性各向异性，其绝对值为5奥斯特（Oe）或更高的差异（ΔH= H 2 H 3 -H c C）在软磁膜的面内径向方向上的磁化饱和磁场强度（H SUB）和磁化饱和磁场强度（H SUB）之间的磁化饱和磁场强度（H SUB）软磁性膜的面内圆周方向，磁各向异性相对于基板轴线对称。

14. 发明申请

US20060012252A1 Linear motor for use in machine tool 审中-公开
标题翻译：用于机床的直线电机
公开(公告)号：US20060012252A1
公开(公告)日：2006-01-19
申请号：US11184645
申请日：2005-07-18
申请人： Koji Miyata , Masanobu Uchida , Ken Ohashi
发明人： Koji Miyata , Masanobu Uchida , Ken Ohashi
IPC分类号： H02K41/00
CPC分类号： H02K41/031 , H02K1/146 , H02K1/2733 , H02K7/09 , H02K2213/03
摘要： The invention is a linear motor that improves the processing speed of machine tools is also a linear motor with significantly reduced cogging force, with which high-speed and high-accuracy processing can be realized. More specifically, the invention is a linear motor for use in a machine tool comprising a stator in which a plurality of permanent magnets having the same shape are mounted on both faces of a plate-like yoke at even intervals such that the permanent magnets have polarities being perpendicular to a direction in which a pair of movers move and alternating in the moving direction; the movers in which armature cores wound with armature coils are disposed such that the armature cores are opposed to the rows of the permanent magnets on the both faces of the stator; and magnetic cores that are disposed on both ends of the movers such that the distance between the magnetic cores and the rows of the permanent magnets is longer than that between the armature cores and the rows of the permanent magnets. Moreover, provided is a laser processing machine in which the above-mentioned permanent magnet type linear motor is used for a three-dimensional moving mechanism.
摘要翻译：本发明是提高机床加工速度的线性马达，也是具有明显减小的齿槽力的线性马达，可实现高速高精度加工。更具体地说，本发明是一种用于机床的线性电动机，其包括定子，其中具有相同形状的多个永磁体以均匀间隔安装在板状磁轭的两个面上，使得永磁体具有极性垂直于一对移动体沿移动方向移动和交替的方向; 电枢铁芯缠绕有电枢线圈的移动器被布置成使得电枢铁芯与定子的两个表面上的永久磁铁列相对; 以及设置在移动体的两端的磁芯，使得磁芯与永磁体的排之间的距离比电枢铁芯和永磁体列之间的距离长。此外，提供了一种激光加工机，其中上述永磁型线性马达用于三维移动机构。

15. 发明授权

US6057656A Magnet block assembly for insertion device 失效
标题翻译：用于插入装置的磁铁块组件
公开(公告)号：US6057656A
公开(公告)日：2000-05-02
申请号：US059086
申请日：1998-04-13
申请人： Ken Ohashi , Masayuki Kawai
发明人： Ken Ohashi , Masayuki Kawai
IPC分类号： H01F7/02 , H01F13/00 , H05H7/04 , H05H13/04 , H01F7/00 , H01J23/10
CPC分类号： H01F7/0278 , H05H7/04 , H01F13/00
摘要： Disclosed is a novel composite magnet assembly for an insertion device of the Halbach type or hybrid type to be inserted into the linear part of, for example, an electron accelerator to generate a sine-curved periodical magnetic field in the air gap between two oppositely facing composite magnet block arrays. Different from a conventional magnet block assembly consisting of a plurality of permanent magnet blocks or alternate assembly of permanent magnet blocks and soft-magnetic pole pieces, the inventive magnet block assembly is composed of a plurality of oppositely facing composite magnet blocks each formed with a single base magnet block provided with a plurality of slits into which insert magnet pieces or insert pole pieces are inserted so that the dimensional accuracy in the length-wise direction of the magnet block assembly can be greatly decreased to improve the regularity of the periodical magnetic field. The base magnet block as well as the insert magnet piece in the Halbach type assembly can be magnetized after assemblage by the application of a pulsed magnetic field.
摘要翻译：公开了一种用于将Halbach型或混合型插入装置插入到例如电子加速器的直线部分中的新型复合磁体组件，以在两相对面的气隙中产生正弦弯曲周期磁场复合磁块阵列。与由多个永磁体块或永磁体块和软磁极片的交替组件组成的常规磁块组件不同，本发明的磁块组件由多个相对的复合磁体块组成，每个形成有单个基体磁体块设置有插入磁体块或插入磁极片的多个狭缝，从而能够大大降低磁体块组件的长度方向的尺寸精度，以提高周期磁场的规律性。 Halbach型组件中的基体磁块以及嵌入式磁体可以通过施加脉冲磁场在组装之后被磁化。

16. 发明授权

US5291171A Magnet apparatus suitable for magnetic resonance imaging 失效
标题翻译：适用于磁共振成像的磁铁设备
公开(公告)号：US5291171A
公开(公告)日：1994-03-01
申请号：US991225
申请日：1992-12-16
申请人： Nobutaka Kobayashi , Ken Ohashi , Koji Miyata
发明人： Nobutaka Kobayashi , Ken Ohashi , Koji Miyata
IPC分类号： A61B5/055 , G01R33/20 , G01R33/383 , H01F5/00 , H01F7/02 , H01F3/00
CPC分类号： H01F7/0278 , G01R33/383
摘要： The invention relates to an apparatus for producing a magnetic field in a space between two oppositely arranged permanent magnet discs, which is suitable for use in magnetic resonance imaging (MRI). An object of the invention is to reduce the size and weight of the yoke connecting the two permanent magnet discs without causing magnetic saturation of the yoke in view of the fact that magnetic saturation of the yoke leads to the appearance of leakage flux and consequential lowering of the uniformity of the magnetic field. The object is accomplished by regulating the cross-sectional area of the whole magnetic path in the yoke, A.sub.y, such that the following equation holds: A.sub.y =1/a.times.A.sub.m B.sub.m /B.sub.ys, where A.sub.m is the cross-sectional area of magnetic path in each permanent magnet disc, B.sub.m is the magnetic flux density in each permanent magnet disc at normal temperature, B.sub.ys is the saturation magnetic flux density of the yoke at normal temperature, and a is a coefficient the value of which is not larger than 1 and not smaller than 0.6.
摘要翻译：本发明涉及一种用于在两个相对布置的永磁体盘之间的空间中产生磁场的装置，其适用于磁共振成像（MRI）。发明内容本发明的目的是为了减小连接两个永久磁铁盘片的磁轭的尺寸和重量，而不会引起磁轭的磁饱和，因为磁轭的磁饱和导致漏磁通的出现，并导致降低磁场的均匀性。该目的是通过调节磁轭Ay中的整个磁路的横截面积来实现的，使得以下等式成立：Ay = 1 / a * AmBm / Bys，其中Am是磁路的横截面积在每个永久磁铁盘中，Bm是常温下每个永久磁铁盘中的磁通密度，Bys是磁轭在常温下的饱和磁通密度，a是其值不大于1的系数，不小于0.6。

17. 发明申请

US20120105184A1 ANISOTROPIC RARE EARTH SINTERED MAGNET AND MAKING METHOD 失效
标题翻译：各向异性稀土烧结磁体和制备方法
公开(公告)号：US20120105184A1
公开(公告)日：2012-05-03
申请号：US13279591
申请日：2011-10-24
申请人： Ken Ohashi
发明人： Ken Ohashi
IPC分类号： H01F7/02 , B22F3/12
CPC分类号： H01F41/0273 , B22F2999/00 , C22C33/02 , C22C2202/02 , H01F1/0577 , B22F3/02 , B22F2202/05
摘要： An anisotropic rare earth sintered magnet has a tetragonal R2Fe14B compound as a major magnetic phase, wherein R is Nd or a mixture of Nd with at least one rare earth element. Grains of the compound phase have two crystallographic axes, c and a-axes aligned. The biaxially aligned magnet exhibits a coercivity Hc of at least 1.6 MA/m.
摘要翻译：各向异性稀土烧结磁体具有作为主要磁相的四方晶R2Fe14B化合物，其中R为Nd或Nd与至少一种稀土元素的混合物。复合相的晶粒具有两个结晶轴，c和a轴对准。双轴取向磁铁的矫顽磁力Hc为1.6MA / m以上。

18. 发明申请

US20050189042A1 Rare earth permanent magnet 有权
标题翻译：稀土永磁铁
公开(公告)号：US20050189042A1
公开(公告)日：2005-09-01
申请号：US11062961
申请日：2005-02-22
申请人： Ken Ohashi
发明人： Ken Ohashi
IPC分类号： C22C1/04 , C22C38/00 , H01F1/053 , H01F1/055 , H01F1/059
CPC分类号： H01F1/0596 , B22F2998/00 , B22F2999/00 , C22C1/0441 , C22C38/005 , H01F1/0536 , H01F1/0557 , B22F9/04 , B22F3/02 , B22F3/10 , B22F2202/05
摘要： It is an object of the present invention to provide a permanent magnet which is observed as a uniform structure without microstructures, but shows a pinning type initial magnetization curve. There is provided a rare earth permanent magnet comprising a magnetic intermetallic compound comprising R, T, N and an unavoidable impurity, wherein R is one or more rare earth elements comprising Y, T is two or more transition metal elements and comprises principally Fe and Co; wherein the magnetic intermetallic compound has an T/R atomic ratio of 6 to 14; a magnetocrystalline anisotropy energy of at least 1 MJ/m3; a Curie point of at least 100° C.; average particle diameter of at least 3 μm; and a substantially uniform structure; wherein the rare earth permanent magnet has a structure that gives a pinning-type initial magnetization curve; and wherein the magnetic intermetallic compound has a Th2Zn17-type structure, and the like.
摘要翻译：本发明的目的是提供一种永久磁铁，其被观察为没有微结构的均匀结构，但是示出了钉扎型初始磁化曲线。提供了包含由R，T，N和不可避免的杂质组成的磁性金属间化合物的稀土永磁体，其中R是一种或多种包含Y的稀土元素，T是两种或更多种过渡金属元素，并且主要包括Fe和Co ; 其中所述磁性金属间化合物的T / R原子比为6〜14; 至少1 MJ / m 3的磁晶各向异性能; 居里点至少为100°C。平均粒径至少3μm; 和基本均匀的结构; 其中所述稀土永磁体具有给出钉扎型初始磁化曲线的结构; 并且其中所述磁性金属间化合物具有Th 2 N 2 Zn 17 N 3结构等。

19. 发明申请

US20050011860A1 Substrate for magnetic recording medium, method for manufacturing the same and magnetic recording medium 审中-公开
标题翻译：磁记录介质用基板，其制造方法及磁记录介质
公开(公告)号：US20050011860A1
公开(公告)日：2005-01-20
申请号：US10886769
申请日：2004-07-08
申请人： Masatoshi Ishii , Toshihiro Tsumori , Ken Ohashi
发明人： Masatoshi Ishii , Toshihiro Tsumori , Ken Ohashi
IPC分类号： G11B5/62 , B44C1/22 , C03C25/68 , C30B29/06 , C30B29/60 , C30B33/00 , G11B5/84 , H01L21/76
CPC分类号： C30B29/06 , C30B29/60 , C30B33/00
摘要： Provided is a substrate for a magnetic recording medium, preferably a substrate having a small diameter of not more than 65 mm, which is advantageous in respect of physical properties and cost. More specifically, provided is a substrate for a magnetic recording medium, using a monocrystalline silicon wafer which has been heated and/or etched at least once before. Moreover, provided is a method for manufacturing a substrate for a magnetic recording medium, the method comprising a step of coring for obtaining a plurality of doughnut-shaped substrates having an outer diameter of not more than 65 mm from a monocrystalline silicon wafer having a diameter of at least 150 mm and at most 300 mm which has undergone heating and/or etching at least once. The method may preferably further comprise a step of chamfering for removing edges of inner and outer circumferential faces of said doughnut-shaped substrate; and a step of circumferential face-polishing for polishing the chamfered inner and outer circumferential faces.
摘要翻译：提供了一种用于磁记录介质的基板，优选具有不大于65mm的小直径的基板，这在物理性能和成本方面是有利的。更具体地，提供了一种用于磁记录介质的基板，其使用已经被加热和/或蚀刻至少一次的单晶硅晶片。此外，提供了一种用于制造用于磁记录介质的基板的方法，该方法包括以下步骤：从具有直径不大于65mm的单晶硅晶片获得外径不大于65mm的多个环形基板至少150mm且至多300mm，其经过加热和/或蚀刻至少一次。该方法可以优选地还包括倒角步骤，用于去除所述环形基底的内周面和外周面的边缘; 以及用于研磨倒角的内周面和外周面的圆周面抛光步骤。

20. 发明授权

US06666957B2 Magnetron sputtering system and photomask blank production method based on the same 有权
公开(公告)号：US06666957B2
公开(公告)日：2003-12-23
申请号：US10036685
申请日：2001-12-21
申请人： Masataka Watanabe , Satoshi Okazaki , Hideo Kaneko , Ken Ohashi , Hideki Kobayashi
发明人： Masataka Watanabe , Satoshi Okazaki , Hideo Kaneko , Ken Ohashi , Hideki Kobayashi
IPC分类号： C23C1435
CPC分类号： H01J37/3455 , C23C14/35 , H01J37/3408
摘要： The present invention provides a magnetron sputtering system, which ensures a formation of a desired thin film, using a thick target. In the sputtering process, a portion of the target does not have erosion free portions. The present invention provides a magnetron sputtering system comprising a chamber for sputtering, a target electrode 5 installed inside said chamber, a substrate electrode 6 installed in the chamber opposite to the target electrode, a ring-shaped magnet 2 installed so as to enclose the side surface of the target electrode, and a semi-circular disk shaped magnet installed opposite to the target-mounted surface of the target electrode, wherein the semi-circular disk shaped magnet is rotated in the circumferential direction of the target electrode and is magnetized in the direction perpendicular to the target electrode. This ensures a specific magnetic field component to be generated over the thick planar target surface 3.

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