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    • 44. 发明授权
    • Magnetic storage apparatus
    • 磁存储装置
    • US06297929B1
    • 2001-10-02
    • US09557002
    • 2000-04-20
    • Hisashi TakanoMasahiro KitadaMikio Suzuki
    • Hisashi TakanoMasahiro KitadaMikio Suzuki
    • G11B5127
    • G11B5/31G11B5/012G11B5/09G11B5/1272G11B5/17G11B5/3109G11B5/313G11B5/39G11B5/3967
    • The proposed magnetic storage apparatus has the following features. The frequency at which data is recorded is selected to be 45 MHz. The thickness, resistivity and relative permeability of the magnetic film of which the magnetic poles of the magnetic head used in the apparatus are made are designed considering the eddy current loss. Also, the relation of &mgr;d2/&rgr;≦500 is satisfied where d (&mgr;m) is the thickness of the magnetic film of which the magnetic poles of the magnetic head are made, &rgr;(&mgr;&OHgr;-cm) is the resistivity, and &mgr;is the relative permeability in a low-frequency range. Under these conditions, the amount of attenuation of recording magnetic field is reduced to 10% or below, and problems of writing blur and overwrite value variation which occur as the recording frequency changes can be solved. Moreover, the media data rate is 15 megabytes per sec., and the areal data-recording density is 500 megabits per square inch or more.
    • 所提出的磁存储装置具有以下特征。 记录数据的频率选择为45 MHz。 考虑到涡电流损耗,设计制造设备中使用的磁头的磁极的磁性膜的厚度,电阻率和相对磁导率。 此外,在d(mum)是制造磁头的磁极的磁性膜的厚度,rho(μOMEGA-cm)是电阻率的情况下,满足mud2 / rho <= 500的关系,并且mu 在低频范围内的相对磁导率。 在这些条件下,记录磁场的衰减量降低到10%以下,可以解决写入模糊和记录频率变化时的覆盖值变化的问题。 此外,媒体数据速率为每秒15兆字节,而面积数据记录密度为500兆比特每平方英寸或更多。
    • 46. 发明授权
    • Measuring instrument
    • 测量仪器
    • US6119359A
    • 2000-09-19
    • US087972
    • 1998-06-01
    • Mikio SuzukiShuuji Hayashida
    • Mikio SuzukiShuuji Hayashida
    • G01B3/20G01B3/22G01B21/02
    • G01B3/22G01B3/20
    • An electrical base 32 having a stationary detection element 31 is fixed to a body case 11 movably supporting a spindle 13, and a synthetic resin made scale holder 34 is provided to synchronize with the spindle 13 and move through a guide 33. In addition, a scale 36 having a movable detection element 35 is adherently fixed to the scale holder 34 at a plurality of points. More specifically, a projection 51 is fixed through an adhesive layer 52 to the back face of the scale 36, and held in a accommodating hole 46 formed in the scale holder 34, and then adhered through an adhesive layer 53 in the circumferential direction. As a result, the reduction in weight can be achieved and a disadvantage with the reduction in weight (which is that a gap between a stationary detection element and a movable detection element is changed) can be resolved.
    • 具有固定检测元件31的电底座32固定在可移动地支撑心轴13的主体壳体11上,并且合成树脂制成的刻度尺支架34设置成与心轴13同步并且移动通过导向件33.另外, 具有可移动检测元件35的标尺36在多个点附着地固定到刻度尺支架34上。 更具体地,突起51通过粘合剂层52固定到刻度尺36的背面,并且保持在形成在刻度保持器34中的容纳孔46中,然后通过粘合层53沿圆周方向粘合。 结果,可以实现重量的减轻,并且可以解决重量减轻(即,固定检测元件和可移动检测元件之间的间隙改变)的缺点。
    • 48. 发明授权
    • Magnetic storage apparatus
    • 磁存储装置
    • US6064546A
    • 2000-05-16
    • US3506
    • 1998-01-06
    • Hisashi TakanoMasahiro KitadaMikio Suzuki
    • Hisashi TakanoMasahiro KitadaMikio Suzuki
    • G11B5/012G11B5/02G11B5/09G11B5/127G11B5/17G11B5/31G11B5/39G11B5/23
    • G11B5/31G11B5/012G11B5/09G11B5/1272G11B5/17G11B5/3109G11B5/313G11B5/39G11B5/3967
    • The proposed magnetic storage apparatus has the following features. The frequency at which data is recorded is selected to be 45 MHz. The thickness, resistivity and relative permeability of the magnetic film of which the magnetic poles of the magnetic head used in the apparatus are made are designed considering the eddy current loss. Also, the relation of .mu.d.sup.2 /.rho..ltoreq.500 is satisfied where d (.mu.m) is the thickness of the magnetic film of which the magnetic poles of the magnetic head are made, .rho. (.mu..OMEGA.-cm) is the resistivity, and .mu. is the relative permeability in a low-frequency range. Under these conditions, the amount of attenuation of recording magnetic field is reduced to 10% or below, and problems of writing blur and overwrite value variation which occur as the recording frequency changes can be solved. Moreover, the media data rate is 15 megabytes per sec., and the areal data-recording density is 500 megabits per square inch or more.
    • 所提出的磁存储装置具有以下特征。 记录数据的频率选择为45 MHz。 考虑到涡电流损耗,设计制造设备中使用的磁头的磁极的磁性膜的厚度,电阻率和相对磁导率。 此外,满足μd2 / rho <500的关系,其中d(μm)是制造磁头的磁极的磁膜的厚度,rho(mu OMEGA-cm)是电阻率 ,mu是低频范围内的相对磁导率。 在这些条件下,记录磁场的衰减量降低到10%以下,可以解决写入模糊和记录频率变化时的覆盖值变化的问题。 此外,媒体数据速率为每秒15兆字节,而面积数据记录密度为500兆比特每平方英寸或更多。