公开(公告)号：US5124284A

公开(公告)日：1992-06-23

申请号：US533884

申请日：1990-06-06

申请人： Masanobu Ishida ,  Nobuyuki Ito ,  Keiko Higashi

发明人： Masanobu Ishida ,  Nobuyuki Ito ,  Keiko Higashi

IPC分类号： C04B35/581

CPC分类号： C04B35/581

摘要： Disclosed is an aluminium nitride sintered body composed of a sintered body of aluminum nitride, erubium (Er) metal or its compound and calcium (Ca) metal or its compounds, said sintered body containing 1.8 to 10% by weight of an erubium component calculated as an oxide and more than 0 to not more than 2% by weight of a calcium component calculated as an oxide, and consisting of crystal grains of aluminum nitride and an intergranular phase composed mainly of an aluminate other than Er.sub.3 Al.sub.5 O.sub.12, said sintered body further having a bulk density of 3.2 to 3.6 g/cm.sup.3.

摘要翻译： 公开了一种由氮化铝，铒（Er）金属或其化合物和钙（Ca）金属或其化合物的烧结体组成的氮化铝烧结体，所述烧结体含有1.8至10重量％的铕组分，计算为 氧化物和大于0重量％且不超过2重量％的作为氧化物计算的钙成分，由氮化铝的晶粒和主要由除Er3Al5O12以外的铝酸盐组成的晶间相构成，所述烧结体还具有 堆积密度为3.2〜3.6g / cm3。

公开(公告)号：US20060226349A1

公开(公告)日：2006-10-12

申请号：US11397805

申请日：2006-04-05

申请人： Norikazu Okada ,  Noritaka Kishi ,  Keiko Higashi

发明人： Norikazu Okada ,  Noritaka Kishi ,  Keiko Higashi

IPC分类号： G01D5/34

CPC分类号： G01D5/3473 ,  G01D5/2451

摘要： The photoelectric encoder of the present invention has a light-emitting device and light-receiving devices arranged in one direction in a region that light from the light-emitting device can reach. When a moving object that alternately has a light-on portion that produces a state in which light is incident on the light-receiving device and a light-off portion that produces a state in which light is not incident on the light-receiving device passes at a prescribed movement frequency in the one direction, an output of each of the light-receiving devices takes a value corresponding to the incidence or nonincidence of light on the light-receiving device. A logical operating section carries out operation of the logical values expressed by the outputs of the light-receiving devices to form an output signal that has a frequency different from the movement frequency.

摘要翻译： 本发明的光电编码器具有在从发光装置的光可以到达的区域中沿一个方向排列的发光装置和光接收装置。 当交替地具有产生光入射到光接收装置的状态的点亮部分的移动物体和产生未入射在光接收装置上的光的状态的熄灭部分通过时 在一个方向上以规定的移动频率，每个光接收装置的输出获得与光接收装置上的光的入射或不一致的值。 逻辑操作部分执行由光接收装置的输出表示的逻辑值的操作，以形成具有与移动频率不同的频率的输出信号。

公开(公告)号：US6021024A

公开(公告)日：2000-02-01

申请号：US292214

申请日：1994-08-19

申请人： Junichi Akiyama ,  Tetsuo Inoue ,  Keiko Higashi ,  Yasuo Ohtsubo ,  Kazushi Tanimoto

发明人： Junichi Akiyama ,  Tetsuo Inoue ,  Keiko Higashi ,  Yasuo Ohtsubo ,  Kazushi Tanimoto

IPC分类号： G11B5/012 ,  G11B5/48 ,  G11B5/60 ,  G11B5/55

CPC分类号： G11B5/6005 ,  G11B5/012 ,  G11B5/4886

摘要： A magnetic disk drive for carrying out reading/writing of information to/from a magnetic disk having a plurality of tracks including an innermost circumference track and an outermost circumference track. The disk drive includes a rotary actuator and a magnetic head mounted on a magnetic head slider which has separate writing and reading elements. The elements have a magnetic gap for reading and writing the information on a magnetic disk. A rotary actuator arm has one end connected to a rotary actuator and the other end connected to the magnetic head slider. The head slider has an inflow end and an outflow end for the fluid flow generated by the rotation of the disk and at least one bearing which generates a dynamic pressure by the fluid flow. The head is provided close to the outflow. A skew angle created between the magnetic gap length direction and the rotating direction of the disk is substantially constant between the innermost and the outermost tracks. The bearing is arranged at a given angle with respect to the rotating direction so that the outflow end is located on the outer circumferential side of the magnetic disk from the inflow end.

摘要翻译： 一种磁盘驱动器，用于对具有包括最内圆周轨道和最外圆周轨道的多个轨道的磁盘执行信息的读/写。 磁盘驱动器包括旋转致动器和安装在具有单独的写入和读取元件的磁头滑块上的磁头。 这些元件具有用于在磁盘上读取和写入信息的磁隙。 旋转致动器臂的一端连接到旋转致动器，另一端连接到磁头滑块。 磁头滑块具有用于由盘的旋转产生的流体流的流入端和流出端，以及由流体流产生动态压力的至少一个轴承。 头部靠近流出口提供。 在磁隙长度方向和盘的旋转方向之间产生的倾斜角度在最内侧轨道和最外侧轨道之间基本恒定。 轴承相对于旋转方向以给定的角度布置，使得流出端从流入端位于磁盘的外周侧。

公开(公告)号：US6021020A

公开(公告)日：2000-02-01

申请号：US959324

申请日：1997-10-28

申请人： Jun Itoh ,  Keiko Higashi

发明人： Jun Itoh ,  Keiko Higashi

IPC分类号： G11B5/60 ,  G11B21/21

CPC分类号： G11B5/6005 ,  G11B21/21

摘要： On a head slider 203a, a read/write head 20 for reading and/or writing information on a disk being a rotatable recording medium is mounted. The head slider 203a comprises: a head slider body; a dynamic-pressure generating part 2a (2b) for generating a dynamic pressure, the dynamic-pressure generating part being formed on a surface of the head slider body facing the disk; and a negative-pressure generating part 81a (81b) for generating a negative pressure, the negative-pressure generating part being provided on a plane of the head slider body facing the disk and in the rear of a central portion of the head slider body in a rotating direction of the disk. Thus, it is possible to provide a head slider having a small yaw-angle dependence, and a read/write apparatus, which has the head slider and which is capable of improving the recording density thereof.

摘要翻译： 在磁头滑块203a上，安装用于读取和/或写入作为可旋转记录介质的磁盘上的信息的读/写头20。 头滑块203a包括：头滑块体; 用于产生动压的动压发生部2a（2b），所述动压发生部形成在所述头滑块体面向所述盘的表面上; 和用于产生负压的负压产生部分81a（81b），所述负压产生部分设置在所述头部滑块体的与所述盘对置的平面上并且位于所述头部滑块体的中心部分的后部 盘的旋转方向。 因此，可以提供具有小偏转角依赖性的磁头滑块和具有磁头滑块并且能够提高其记录密度的读/写装置。

公开(公告)号：US07391010B2

公开(公告)日：2008-06-24

申请号：US11397805

申请日：2006-04-05

申请人： Norikazu Okada ,  Noritaka Kishi ,  Keiko Higashi

发明人： Norikazu Okada ,  Noritaka Kishi ,  Keiko Higashi

IPC分类号： G01D5/34

CPC分类号： G01D5/3473 ,  G01D5/2451

摘要： The photoelectric encoder of the present invention has a light-emitting device and light-receiving devices arranged in one direction in a region that light from the light-emitting device can reach. When a moving object that alternately has a light-on portion that produces a state in which light is incident on the light-receiving device and a light-off portion that produces a state in which light is not incident on the light-receiving device passes at a prescribed movement frequency in the one direction, an output of each of the light-receiving devices takes a value corresponding to the incidence or nonincidence of light on the light-receiving device. A logical operating section carries out operation of the logical values expressed by the outputs of the light-receiving devices to form an output signal that has a frequency different from the movement frequency.

摘要翻译： 本发明的光电编码器具有在从发光装置的光可以到达的区域中沿一个方向排列的发光装置和光接收装置。 当交替地具有产生光入射到光接收装置的状态的点亮部分的移动物体和产生未入射在光接收装置上的光的状态的熄灭部分通过时 在一个方向上以规定的移动频率，每个光接收装置的输出获得与光接收装置上的光的入射或不一致的值。 逻辑操作部分执行由光接收装置的输出表示的逻辑值的操作，以形成具有与移动频率不同的频率的输出信号。

公开(公告)号：US06522501B1

公开(公告)日：2003-02-18

申请号：US09661570

申请日：2000-09-14

申请人： Keiko Higashi

发明人： Keiko Higashi

IPC分类号： G11B582

CPC分类号： G11B5/60

摘要： A magnetic recording medium is obtained, which satisfies R−9709/N

摘要翻译： 当其表面被表面压力为250gf / mm 2以下的磁头吸引或负荷面积比为5％以下时，得到满足R-9709 / N <6.6的磁记录介质，其中 N是每平方米的粗糙数，R（nm）是凹凸峰顶的平均曲率半径。 这种磁记录介质即使头部接触件与其一起滑动也不会引起动态吸引，并且稳定地旋转，从而可以很好地写入/读取信息。