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    • 2. 发明授权
    • Disc rotor for preventing squeal
    • 用于防止尖叫的盘式转子
    • US5417313A
    • 1995-05-23
    • US240399
    • 1994-05-10
    • Mikio MatsuzakiToshitaka IzumiharaToru Yoshino
    • Mikio MatsuzakiToshitaka IzumiharaToru Yoshino
    • F16D65/00F16D65/12F16D69/00
    • F16D65/12F16D65/0006F16D65/128F16D2065/1308F16D2065/1328F16D2069/004
    • A hollow hole is radially formed in a rotor in at least one position on its circumference so that the minimum thickness between an inner surface of the hollow hole and each of the front and rear braking surfaces is selected to be not larger than 3 mm. Alternatively, in a ventilated rotor, at least one of a plurality of holes formed radially in the rotor is shaped into an expanded hole so that the minimum thickness between an inner surface of the hole and each of the front and rear braking surfaces is selected to be not larger than 3 mm. Two rows of small circular holes may be formed in a specific arrangement so as to penetrate a disc rotor. If longitudinal wave vibration is transmitted to the disc rotor, squeals due to an even number order resonance mode, that is, a resonance mode of the second, fourth, sixth order or the like, can be effectively attenuated by specially shaped hollow holes, reduced holes, or two rows of small circular holes formed in a disc rotor.
    • 中空孔在其圆周上的至少一个位置处在转子中径向形成,使得中空孔的内表面与前后制动表面中的每一个之间的最小厚度选择为不大于3mm。 或者,在通风转子中,径向形成在转子中的多个孔中的至少一个成形为扩孔,使得孔的内表面与前后制动面之间的最小厚度选择为 不大于3毫米。 可以以特定布置形成两排小圆形孔,以便穿过盘形转子。 如果纵波振动传递到盘转子,则由于偶数阶谐振模式即第二,第四,第六等的共振模式引起的尖叫可以通过特殊形状的中空孔被有效衰减,减少 孔或两排形成在盘转子中的小圆形孔。
    • 4. 发明授权
    • Method of maintaining a constant flying height of a magnetic head and a magnetic disk drive utilized therefor
    • 保持磁头恒定飞行高度的方法和用于此的磁盘驱动器
    • US06680820B2
    • 2004-01-20
    • US10158914
    • 2002-06-03
    • Mikio MatsuzakiKazumasa FukudaTakamitsu Tsuna
    • Mikio MatsuzakiKazumasa FukudaTakamitsu Tsuna
    • G11B560
    • G11B5/6005
    • A method of maintaining a constant flying height of a magnetic head: adapted to maintain a flying height of a magnetic head on a magnetic disk substantially constant irrespective of a change of a skew angle, utilizing a device comprising a magnetic disk, a positioning device, a head supporting device and a magnetic head; said positioning device supporting one end of said head supporting device and rotating the head supporting device on a first plane placed on a second plane of said magnetic disk within a predetermined skew angle range; the head supporting device supporting said magnetic head at the other end thereof; the magnetic head being attached with reading/writing elements at an air discharge end of a slider having flying planes on a side of a third plane thereof opposing the magnetic disk; a thickness of said slider from each of the flying planes to an opposite surface on the reverse side thereof being 0.65 mm or less; a length in a first direction of air discharge thereof being 3 mm or less, and a width in a second direction orthogonal to the first direction of air discharge thereof being 2.5 mm or less; wherein a change of the flying height of the magnetic head on the magnetic disk is 0.02 &mgr;m or less, when the skew angle is changed in a range of −20 to 20 degree.
    • 一种保持磁头恒定飞行高度的方法:适于使磁头在磁盘上的飞行高度基本上恒定,而与斜角的变化无关,利用包括磁盘,定位装置, 头部支撑装置和磁头; 所述定位装置支撑所述头部支撑装置的一端并将头部支撑装置旋转在预定的倾斜角度范围内的位于所述磁盘的第二平面上的第一平面上; 头支撑装置在其另一端支撑所述磁头; 所述磁头在与所述磁盘相对的第三平面的一侧具有飞平面的滑块的排气端处附接有读/写元件; 所述滑块从每个飞行平面到其相反侧的相对表面的厚度为0.65mm以下; 空气排出的第一方向的长度为3mm以下,与第一空气排出方向正交的第二方向的宽度为2.5mm以下; 其中,当所述倾斜角度在-20至20度的范围内变化时,所述磁盘上的磁头的飞行高度的变化为0.02μm或更小。
    • 6. 发明授权
    • Apparatus for measuring magnetic field of microwave-assisted head
    • 用于测量微波辅助头磁场的装置
    • US08358127B2
    • 2013-01-22
    • US12755803
    • 2010-04-07
    • Isamu SatoHiroshi IkedaMikio MatsuzakiTetsuya RoppongiNoboru YamanakaTsutomu Aoyama
    • Isamu SatoHiroshi IkedaMikio MatsuzakiTetsuya RoppongiNoboru YamanakaTsutomu Aoyama
    • G01R33/02
    • G11B5/455G01R33/098G01R33/1284
    • A measuring circuit system in a magnetic field measuring apparatus of the invention has an amplifier and a band-pass filter connected in sequence on an output terminal side of the TMR element, the band-pass filter is a narrow-range band-pass filter such that a peak pass frequency of the filter that is a center is a basic frequency selected from a range of 10 to 40 GHz and a band width centered around the basic frequency is a narrow range of ±0.5 to ±4 GHz; and with the measuring circuit system, an SIN ratio (SNR) of 3 dB or greater is obtained, the SNR being defined by a ratio of an amplitude S of a high-frequency generated signal induced by the TMR element to a total noise N that is a sum of a head noise generated by the TMR element and a circuit noise generated by the amplifier. With such a configuration, an in-plane high-frequency magnetic field generated by a microwave-assisted magnetic head is reliably and precisely measured.
    • 本发明的磁场测量装置中的测量电路系统具有在TMR元件的输出端侧依次连接的放大器和带通滤波器,带通滤波器是窄范围带通滤波器, 作为中心的滤波器的峰值通过频率是从10〜40GHz的范围选择的基本频率,以基本频率为中心的带宽为±0.5〜±4GHz的窄范围; 并且利用测量电路系统,获得3dB或更大的SIN比(SNR),SNR由TMR元件引起的高频产生信号的振幅S与总噪声N的比值定义, 是由TMR元件产生的头噪声和由放大器产生的电路噪声的总和。 通过这样的结构,可以可靠且精确地测量由微波辅助磁头产生的面内高频磁场。