公开(公告)号：US06641891B2

公开(公告)日：2003-11-04

申请号：US10112502

申请日：2002-03-27

申请人： Hiroaki Doushita ,  Nobuo Yamazaki

发明人： Hiroaki Doushita ,  Nobuo Yamazaki

IPC分类号： G11B5706

CPC分类号： G11B5/714 ,  G11B5/70 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

摘要： Provided is a particulate magnetic recording medium having good processing properties and being inexpensive to produce, similar to prior recording media, wherein by controlling the magnetic clusters that appear due to recording at short wavelengths and thinning of the magnetic layer, good high-density characteristics are achieved in combination with MR heads. The magnetic recording medium comprising an essentially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic powder and a binder in this order, wherein the magnetic layer has a thickness ranging from 0.01 to 0.15 &mgr;m and a coercivity equal to or higher than 159 kA/m, ferromagnetic particles contained in the ferromagnetic powder have a size less than ½ of the minimum recording wavelength, and an average size of magnetic cluster at DC erase is equal to or higher than 0.5×104 nm2 and less than 5.5×104 nm2.

摘要翻译： 提供了类似于现有记录介质的具有良好加工性能并且制造成本低的颗粒状磁记录介质，其中通过控制由于在短波长下记录而出现的磁簇和磁层的变薄，良好的高密度特性 与MR主管结合。 该磁记录介质依次包括基本上非磁性的下层和包含铁磁粉末和粘合剂的磁性层，其中磁性层的厚度范围为0.01至0.15μm，矫顽力等于或高于159kA / m 包含在铁磁粉末中的铁磁颗粒的尺寸小于最小记录波长的1/2，并且DC擦除时的磁簇的平均尺寸等于或高于0.5×10 4 nm 2且小于5.5×10 5 4nm 2。

公开(公告)号：US5622174A

公开(公告)日：1997-04-22

申请号：US130834

申请日：1993-10-04

申请人： Nobuo Yamazaki

发明人： Nobuo Yamazaki

IPC分类号： A61B8/08 ,  G01S7/52 ,  G01S15/58 ,  G01S15/89 ,  A61B8/12

CPC分类号： G01S15/8979 ,  A61B8/463 ,  A61B8/488 ,  G01S15/8984 ,  G01S7/52071 ,  G01S7/52085 ,  G01S15/899 ,  G01S15/8993 ,  G01S7/5206 ,  G01S7/52063 ,  G01S7/52073

摘要： There is provided an ultrasonic diagnosis apparatus in which a region containing an organ of an object being examined is diagnosed by means of ultrasonic beams, the organ being in motion, the apparatus comprising: an element for scanning the region by the ultrasonic beams to obtain ultrasonic echo signals having Doppler shift; an element for calculating movement velocities every sampling volume on the basis of the ultrasonic echo signals; and an element for displaying in color the movement velocities.

摘要翻译： 提供了一种超声波诊断装置，其中通过超声波束来诊断包含被检查物体的器官的区域，所述器官在运动中，所述装置包括：用于通过超声波束扫描该区域以获得超声波的元件 具有多普勒频移的回波信号; 基于超声回波信号计算每个采样体积的移动速度的元件; 以及用于以颜色显示移动速度的元素。

公开(公告)号：US5601916A

公开(公告)日：1997-02-11

申请号：US524680

申请日：1995-09-07

申请人： Nobuo Yamazaki ,  Hitoshi Noguchi ,  Shinji Saito

发明人： Nobuo Yamazaki ,  Hitoshi Noguchi ,  Shinji Saito

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/68 ,  G11B5/70 ,  G11B5/706 ,  G11B5/716 ,  G11B5/738

CPC分类号： G11B5/716 ,  G11B5/70 ,  G11B5/70678 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/265

摘要： A magnetic recording medium is described, which comprises a nonmagnetic support having thereon at least one magnetic layer containing ferromagnetic particles dispersed in a binder, wherein the magnetic recording medium has at least one magnetic layer containing at least hexagonal ferrite magnetic particles and the magnetic layer containing the hexagonal ferrite magnetic particles has a coercive force, Hc, of from 1,300 to 5,000 Oe, a ratio of the Hc to an anisotropic magnetic field HK thereof, Hc/HK, of from 0.30 to 1.0, and a squareness ratio of in-plane direction, SQ, of from 0.65 to 1.00.

摘要翻译： 描述了一种磁记录介质，其包括其上具有至少一个含有分散在粘合剂中的铁磁性颗粒的磁性层的非磁性载体，其中该磁记录介质具有至少一个至少含有六方晶系铁氧体磁性颗粒的磁性层和含有 六方晶系铁氧体磁性颗粒的矫顽力Hc为1,300-5,000Oe，Hc与各向异性磁场HK之比Hc / HK为0.30至1.0，平面比为 方向，SQ从0.65到1.00。

公开(公告)号：US5597638A

公开(公告)日：1997-01-28

申请号：US181239

申请日：1994-01-13

申请人： Shinji Saito ,  Nobuo Yamazaki

发明人： Shinji Saito ,  Nobuo Yamazaki

IPC分类号： G11B5/70 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/716 ,  G11B5/738 ,  G11B5/848 ,  G11B5/852 ,  B05D5/12 ,  G11B5/66

CPC分类号： G11B5/852 ,  G11B5/716 ,  G11B5/738 ,  G11B5/848 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

摘要： The present invention provides a magnetic recording medium comprising a nonmagnetic layer mainly having an inorganic nonmagnetic particle dispersed in a binder provided on a nonmagnetic flexible support and a magnetic layer having a ferromagnetic particle dispersed in a binder, characterized in that the magnetic layer comprises a hexagonal ferrite magnetic material and exhibits a thickness of 1 .mu.m or less, or 2.5 .mu.m or less in total if there are a plurality of magnetic layers, a central line average surface roughness of 0.006 .mu.m or less, SFD of 0.3 or less in the longitudinal direction on the plane and Br/Hc of less than 1.5, whereby the short wavelength recording can be remarkably improved in electro-magnetic conversion characteristics, particularly 7 MHz output.

摘要翻译： 本发明提供一种磁记录介质，其包含主要具有分散在非磁性柔性支撑体上的粘结剂中的无机非磁性颗粒的非磁性层和分散在粘合剂中的铁磁颗粒的磁性层，其特征在于，磁性层包括六方晶系 如果存在多个磁性层，中心线平均表面粗糙度为0.006μm以下，SFD为0.3以下，SFD为0.3以下，则铁素体磁性材料的厚度为1μm以下，总共为2.5μm以下 平面上的纵向方向和Br / Hc小于1.5，从而可以显着提高电磁转换特性，特别是7MHz输出的短波长记录。

公开(公告)号：US5081996A

公开(公告)日：1992-01-21

申请号：US556524

申请日：1990-07-24

申请人： Schuichi Kawasaki ,  Nobuo Yamazaki ,  Takeshi Sato

发明人： Schuichi Kawasaki ,  Nobuo Yamazaki ,  Takeshi Sato

IPC分类号： G01N29/26 ,  A61B8/06 ,  G01S7/52 ,  G01S15/89

CPC分类号： G01S15/8979 ,  B82Y15/00 ,  G01S15/8906 ,  G01S15/8977 ,  G01S7/52046 ,  G01S7/5206 ,  G01S7/52071 ,  G01S7/52085

摘要： An ultrasonic imaging apparatus comprises an ultrasonic transducer for transmitting ultrasonic beams to a subject and converting echoes from the subject to echo signals, a scan controller for selectively switching a scanning mode between a first scanning mode in which a predetermined number of rasters in each of a plurality of scanning blocks each having the predetermined number of rasters are scanned repeatedly and echo signals at a predetermined number of sample points in each of the rasters are extracted block by block and a second scanning mode in which a plurality of rasters are repeatedly scanned a predetermined number of times while at least one raster is shifted sequentially and data are output at constant intervals, a transmitter/receiver circuit for driving the ultrasonic transducer in accordance with a scanning mode selected by the scan controller, processes the echo signals output from the ultrasonic transducer to output an image signal and a television monitor for visually displaying the image signal.

摘要翻译： 超声波成像装置包括用于将超声波束发射到对象并将来自受试者的回波转换成回波信号的超声波换能器，扫描控制器，用于在第一扫描模式之间有选择地切换扫描模式，在第一扫描模式中， 重复扫描具有预定数量的光栅的多个扫描块，并且逐块地提取每个光栅中的预定数量的采样点处的回波信号，并且第二扫描模式，其中多个光栅重复扫描预定的 在至少一个光栅顺序移位并以恒定间隔输出数据的次数的同时，根据由扫描控制器选择的扫描模式驱动超声波换能器的发射器/接收器电路处理从超声换能器输出的回波信号 以便视觉地输出图像信号和电视监视器 显示图像信号。

公开(公告)号：US4859881A

公开(公告)日：1989-08-22

申请号：US138865

申请日：1987-12-29

申请人： Yoshihiro Yamamoto ,  Tsutomu Kume ,  Nobuo Yamazaki ,  Fumiharu Hashimoto ,  Koichi Ohya

发明人： Yoshihiro Yamamoto ,  Tsutomu Kume ,  Nobuo Yamazaki ,  Fumiharu Hashimoto ,  Koichi Ohya

IPC分类号： H03H11/12

CPC分类号： H03H11/1217

摘要： A double integration type filter circuit, consisting of a pair of integrators connected in series with each other, has a changeover switch for commutating the filter characteristics to a filter configuration which emphasizes portions proper to the characteristics of the filter circuit to facilitate filter adjustment to reduce filter adjustment time and to realize improved accuracy while providing for automatic adjustment of the filter characteristics.

公开(公告)号：US4851289A

公开(公告)日：1989-07-25

申请号：US150860

申请日：1988-02-01

申请人： Hiroshi Ogawa ,  Shinji Saito ,  Toshihiko Miura ,  Nobuo Yamazaki ,  Hiroaki Araki

发明人： Hiroshi Ogawa ,  Shinji Saito ,  Toshihiko Miura ,  Nobuo Yamazaki ,  Hiroaki Araki

IPC分类号： G11B5/714 ,  G11B5/716

CPC分类号： G11B5/716 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/257

摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon plural magnetic layers containing ferromagnetic particles and binders, wherein the ferromagnetic particles contained in the uppermost magnetic layer have an average long axis length measured by a transmission electron microscope of 0.25 .mu.m or less and a crystal size measured by an X-ray deffractiometory of 300 .ANG. or less, and the ferromagnetic particles contained in the magnetic layers other than the uppermost layer have an average long axis length measured by a transmission electron microscope of 0.25 .mu.m or less and a crystal size measured by an X-ray deffractiometory of 250 .ANG. more, provided that the ferromagnetic particles of the uppermost layer have a crystal size measured by an X-ray deffractiometory smaller than the crystal size measured by an X-ray deffractiometory of the ferromagnetic particles of the magnetic layers other than the uppermost layer.

摘要翻译： 一种磁记录媒体，其特征在于，具有非磁性载体，其上设有包含铁磁性粒子和粘合剂的多个磁性层，其中，所述最上层的磁性层中所含的铁磁性粒子的平均长轴长度为0.25μm以下的透射型电子显微镜 以及通过300AWG以下的X射线折射率测定的结晶尺寸，除了最上层以外的磁性层中含有的铁磁性粒子具有0.25μm以下的透射型电子显微镜测定的平均长轴长度， 通过更大的250纳米X射线衍射仪测量的晶体尺寸，条件是最上层的铁磁颗粒具有通过X射线折射率测量的晶体尺寸，该晶体尺寸小于通过铁磁性X射线分解测量的晶体尺寸 除了最上层之外的磁性层的颗粒。

公开(公告)号：US4125474A

公开(公告)日：1978-11-14

申请号：US710813

申请日：1976-08-02

申请人： Shin-Ichiro Dezawa ,  Koji Sasazawa ,  Tatsuji Kitamoto ,  Nobuo Yamazaki

发明人： Shin-Ichiro Dezawa ,  Koji Sasazawa ,  Tatsuji Kitamoto ,  Nobuo Yamazaki

IPC分类号： C01G49/00 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/11 ,  C01G49/06 ,  C01G49/08

CPC分类号： G11B5/70673 ,  G11B5/70642

摘要： In a process for producing a ferromagnetic powder having a high coercive force which comprises adding an aqueous solution containing Co.sup.+2 ions, or both Co.sup.+2 ions and another cation(s), and an alkali solution to a suspension of a ferromagnetic iron oxide containing the metal(s) given by these ion(s), the improvement wherein said ferromagnetic iron oxide is treated with a reducing agent prior to the preparation of the suspension.

摘要翻译： 在制备具有高矫顽力的铁磁性粉末的方法中，该方法包括将含有Co +2离子或Co + 2离子和另一种阳离子的水溶液和碱溶液加入到铁磁性氧化铁 含有这些离子给出的金属的改进，其中所述铁磁性氧化铁在制备悬浮液之前用还原剂处理。

公开(公告)号：US07515383B2

公开(公告)日：2009-04-07

申请号：US11237973

申请日：2005-09-29

申请人： Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki

发明人： Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki

IPC分类号： G11B5/02 ,  G11B5/48 ,  G11B5/714

CPC分类号： G11B5/70678 ,  G11B5/70 ,  G11B5/714

摘要： Provided is a magnetic recording medium exhibiting good electromagnetic characteristics in high-density recording The magnetic recording medium employed for magnetically recording signals with a track width equal to or less than 2.0 μm and reproducing the magnetically recorded signals, wherein said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder or comprises a nonmagnetic layer comprise a nonmagnetic powder and a binder and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on a nonmagnetic support. Said magnetic layer has a thickness equal to or less than 0.2 μm, and said hexagonal ferrite ferromagnetic powder has an average plate diameter being 1/30 or less of the magnetically recorded track width as well as ½ or less of the thickness of the magnetic layer.

摘要翻译： 提供了一种在高密度记录中表现出良好电磁特性的磁记录介质。磁记录介质，用于磁记录磁道宽度等于或小于2.0μm的信号，并再现磁记录信号，其中所述磁记录介质包括磁 包含六方晶系铁氧体铁磁性粉末和粘合剂的层或包含非磁性层的非磁性层在非磁性载体上依次包含非磁性粉末和粘合剂以及包含六方晶系铁磁铁磁性粉末和粘合剂的磁性层。 所述磁性层具有等于或小于0.2μm的厚度，并且所述六方晶系铁氧体铁磁粉末的平均板直径是磁记录磁道宽度的1/30或更小，以及磁层的厚度的1/2或更小 。

公开(公告)号：US07381482B2

公开(公告)日：2008-06-03

申请号：US11155591

申请日：2005-06-20

申请人： Nobuo Yamazaki ,  Masatoshi Takahashi ,  Akira Manabe ,  Hiroyuki Suzuki

发明人： Nobuo Yamazaki ,  Masatoshi Takahashi ,  Akira Manabe ,  Hiroyuki Suzuki

IPC分类号： G11B5/716

CPC分类号： G11B5/714 ,  B82Y30/00 ,  C01G49/0018 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/42 ,  C04B35/2633 ,  C04B35/265 ,  C04B35/62665 ,  C04B35/632 ,  C04B35/63456 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3251 ,  C04B2235/3275 ,  C04B2235/3284 ,  C04B2235/3409 ,  C04B2235/5409 ,  C04B2235/5454 ,  C04B2235/549 ,  C04B2235/767 ,  C04B2235/96 ,  G11B5/70678 ,  H01F1/113 ,  Y10T428/2982

摘要： A hexagonal ferrite magnetic powder having an average tabular diameter of from 15 to 28 nm, a coercive force (Hc) of from 2,000 to 5,000 Oe (from 160 to 400 kA/m), a switching field distribution (SFD) of from 0.3 to 0.7 and a D70/D50 of from 1.05 to 1.25. This magnetic powder can be obtained by melting and quenching starting materials to obtain an amorphous product, and thermally treating the product, which comprises increasing a temperature at a rate of 300 to 500° C./hr in a temperature range of 550 to 600° C. in the thermal treatment before the temperature reaches the thermally treating temperature.

摘要翻译： 平均片状直径为15〜28nm，矫顽力（Hc）为2,000〜5,000Oe（160〜400kA / m）的六角铁氧体磁性粉末，切换场分布（SFD）为0.3〜 0.7，D 70 / D 50为1.05〜1.25。 这种磁性粉末可以通过熔融和淬火原料获得以获得无定形产物，并对产物进行热处理，其包括在550至600℃的温度范围内以300至500℃/小时的速率升高温度 C.在温度达到热处理温度之前进行热处理。