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    Magnetic recording disc and process for producing the same
    2.
    发明授权
    Magnetic recording disc and process for producing the same 失效
    磁记录盘及其制造方法

    公开(公告)号：US4808455A

    公开(公告)日：1989-02-28

    申请号：US932367

    申请日：1986-11-19

    申请人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Junichi Nakaoka

    发明人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Junichi Nakaoka

    IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/72 ,  G11B5/73 ,  G11B5/738 ,  G11B5/82 ,  G11B5/84

    CPC分类号： G11B5/7315 ,  G11B5/7325 ,  G11B5/84 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/249987 ,  Y10T428/24999

    摘要： An improved magnetic recording disc comprising: a substrate member of an alumina-based ceramic material having micropores of 5 .mu.m or below and having a relative theoretical density of 90% or higher; a glass coating layer of a thickness of 3 to 200 .mu.m with a surface roughness (R.sub.z) of 180 angstroms or below, and being free from micropores and strain; a magnetic thin film formed on the surface of the glass coating layer; and a protective film formed thereon.A process for production of the magnetic recording disc comprises: forming a glass coating layer to a thickness of 5 to 220 .mu.m on the surface of an alumina-based ceramic substrate having micropores of 5 .mu.m or below and a relative theoretical density of at least 90%; then subjecting the glass coating layer to mechanochemical polishing to a layer thickness of 3 to 200 .mu.m, to make free from micropores and strain, and to have a surface roughness (R.sub.z) of 180 angstroms or below; and further coating the surface of the glass coating layer with a magnetic thin film and a protective film.

    摘要翻译： 一种改进的磁记录盘，包括：具有5μm或更小的微孔并且具有90％或更高的相对理论密度的氧化铝基陶瓷材料的基底构件; 厚度为3〜200μm的玻璃涂层，表面粗糙度（Rz）为180度以下，无微孔和应变; 形成在所述玻璃涂层的表面上的磁性薄膜; 和形成在其上的保护膜。 制造磁记录盘的方法包括：在具有5μm或更小的微孔的氧化铝基陶瓷基板的表面上形成厚度为5至220μm的玻璃涂层和相对理论密度 至少90％; 然后对玻璃涂层进行机械化学研磨至3〜200μm的层厚，使其不产生微孔和应变，表面粗糙度（Rz）为180埃以下; 并用磁性薄膜和保护膜进一步涂覆玻璃涂层的表面。

    Recording disk substrate members and process for producing same
    4.
    发明授权
    Recording disk substrate members and process for producing same 失效
    记录盘基片及其制造方法

    公开(公告)号：US4690846A

    公开(公告)日：1987-09-01

    申请号：US759366

    申请日：1985-07-26

    申请人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Junichi Nakaoka

    发明人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Junichi Nakaoka

    IPC分类号： G11B5/82 ,  G11B5/73 ,  G11B5/84 ,  H01F10/02 ,  B05D1/38 ,  B32B7/02

    CPC分类号： G11B5/7315 ,  Y10T428/31

    摘要： A substrate member for recording disk characterized in that a glass coating film is provided on an alumina base ceramic material having micropores of no larger than 5 microns and a relative theoretical density of no less than 96%, said glass coating film having a surface roughness of no more than 80 angstroms, being substantially pore-free and strain-free on the surface, and having a thickness of 0.3 to 200 microns and a relative difference of no more than 10.sup.-6 /deg in the coefficient of thermal expansion with respect to said base material.

    摘要翻译： 一种用于记录盘的基片部件，其特征在于，在氧化铝基陶瓷材料上设置玻璃涂膜，该氧化铝基陶瓷材料的微孔不大于5微米，相对理论密度不低于96％，所述玻璃涂膜的表面粗糙度为 不超过80埃，在表面上基本上无孔和无应变，并且具有0.3至200微米的厚度和相对于热膨胀系数相对于10-6 /度的相对差值 所述基材。

    Process for producing substrate member for magnetic recording disc
    5.
    发明授权
    Process for producing substrate member for magnetic recording disc 失效
    用于制造磁记录盘的基片的方法

    公开(公告)号：US4816128A

    公开(公告)日：1989-03-28

    申请号：US918078

    申请日：1986-10-14

    申请人： Toshiaki Wada ,  Junichi Nakaoka ,  Takayuki Ono

    发明人： Toshiaki Wada ,  Junichi Nakaoka ,  Takayuki Ono

    IPC分类号： B24B37/00 ,  B24B37/005 ,  C04B41/50 ,  C04B41/52 ,  C04B41/86 ,  C04B41/89 ,  C23C14/10 ,  C23C14/58 ,  G11B5/73 ,  G11B5/84 ,  C23C14/34

    CPC分类号： C23C14/5806 ,  C04B41/5022 ,  C04B41/52 ,  C04B41/86 ,  C04B41/89 ,  C23C14/10 ,  C23C14/58 ,  C23C14/5886 ,  G11B5/7315 ,  G11B5/7325

    摘要： A process for producing a substrate member for magnetic recording disc with improved surface state free of defects such as micropores and strain due to machining, and improved surface roughness, such substrate being obtained by first forming a glass coating layer on the surface of a substrate of an alumina-based ceramic material containing therein micropores of 5 .mu.m or less and having a relative theoretical density of 90% or above; then, subjecting the glass coating layer on a substrate to the hot isostatic pressing treatment; and further subjecting the surface of the glass coating layer to mechanochemical polishing to a layer thickness in a range of from 3 .mu.m to 200 .mu.m and the surface free from micropores and strain. Glass coating may be done by glazing or vapor deposition like sputtering.

    摘要翻译： 一种用于制造具有改善的表面状态的磁记录盘的基板部件的制造方法，该基板部件具有改善的表面状态，如微孔和由于机械加工而引起的应变，并且改善了表面粗糙度，所述基板通过首先在基板的表面上形成玻璃涂层 含有5μm以下的微孔，相对理论密度为90％以上的氧化铝系陶瓷材料; 然后将基板上的玻璃涂层进行热等静压处理; 进一步对玻璃被覆层的表面进行机械化学研磨，其厚度为3μm〜200μm，表面无微孔和应变。 玻璃涂层可以通过玻璃或气相沉积（如溅射）进行。

    Arrangement for mechanically and accurately processing a workpiece with a position detecting pattern or patterns
    6.
    发明授权
    Arrangement for mechanically and accurately processing a workpiece with a position detecting pattern or patterns 失效
    用于以位置检测图案或图案机械地和精确地加工工件的布置

    公开(公告)号：US4794736A

    公开(公告)日：1989-01-03

    申请号：US168540

    申请日：1988-03-08

    申请人： Shigehiro Fuwa ,  Naoki Fujii ,  Toshikazu Hatsuse ,  Masaru Ito ,  Toshiaki Wada ,  Junichi Nakaoka

    发明人： Shigehiro Fuwa ,  Naoki Fujii ,  Toshikazu Hatsuse ,  Masaru Ito ,  Toshiaki Wada ,  Junichi Nakaoka

    IPC分类号： B23Q15/24 ,  B24B9/06 ,  B24B49/12 ,  G05B19/402

    CPC分类号： G05B19/402 ,  B23Q15/24 ,  B24B49/12 ,  B24B9/065 ,  G05B2219/37572 ,  G05B2219/41091 ,  G05B2219/45161

    摘要： An arrangement for mechanically processing a workpiece having a position detecting pattern or patterns formed thereon has a mechanically processing tool disposed at a predetermined position, a worktable arranged so as to be linearly moved in at least one of the rectangular coordinate X- and Y-axes while holding the workpiece thereon, and a position aligning unit provided with an opto-electric line sensor capable of detecting one of the patterns of the workpiece and issuing pattern detected signals, and an operation/control unit capable of mathematically processing the detected signals from the line sensor to determine a position of the workpiece to be mechanically processed and generating control signals for controlling the movement of the worktable so that the position to be mechanically processed is aligned with the position of the mechanically processing tool. The line sensor may be a CCD type line sensor.

    摘要翻译： 用于机械加工具有形成在其上的位置检测图案或图案的工件的布置具有设置在预定位置的机械加工工具，布置成在直角坐标X和Y轴中的至少一个中线性移动的工作台 同时保持工件，以及位置对准单元，其具有能够检测工件的图案之一和发出图案检测信号的光电线路传感器，以及操作/控制单元，其能够数学处理来自 线传感器，以确定待机械处理的工件的位置，并产生用于控制工作台的运动的控制信号，使得机械处理的位置与机械加工工具的位置对准。 线传感器可以是CCD型线传感器。

    Process for the production of magnetic head sliders
    9.
    发明授权
    Process for the production of magnetic head sliders 失效
    制造磁头滑块的工艺

    公开(公告)号：US5302560A

    公开(公告)日：1994-04-12

    申请号：US817976

    申请日：1992-01-08

    申请人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Mitsuhiko Furukawa ,  Takashi Kitahira ,  Michito Miyahara ,  Kiyohito Misumi ,  Masaharu Shiroyama

    发明人： Toshiaki Wada ,  Yoshiaki Katsuyama ,  Mitsuhiko Furukawa ,  Takashi Kitahira ,  Michito Miyahara ,  Kiyohito Misumi ,  Masaharu Shiroyama

    IPC分类号： C04B35/565 ,  C04B35/111 ,  C04B35/575 ,  C22C29/02 ,  G11B5/10 ,  G11B5/31 ,  G11B5/60 ,  G11B21/21 ,  C04B35/56

    CPC分类号： G11B5/10 ,  C04B35/111 ,  C04B35/575 ,  G11B5/3106

    摘要： A sintered material for recording/reading (particularly magnetic) head slider is produced by:preparing a powdery mixture which comprises 0.5 to 6.0% by weight of at least one component selected from the component group A consisting of the following elements and compounds thereof, a garnet type compound consisting essentially of erbium oxide and aluminum oxide in amounts of 2 to 12% by weight and 0 (exclusive) to 2 (inclusive) % by weight based on the total composition, respectively, and expressed by the formula Er.sub.3 (Al,Er).sub.2 (AlO.sub.4).sub.3 through (Er, Al).sub.3 Al.sub.2 (AlO.sub.4).sub.3, and the balance being silicon carbide powder:the elements for the component group A being Ti, V, Cr, Mn, Mg, Y, Zr, Nb, Mo, Ba, La, Ce, Gd, Hf, Ta, W, Th, and Cs; andsintering the resultant mass under the application of a high pressure.Further sintering aids of Be, BeO, B and B.sub.4 C may be present. For the garnet type compound, erbium oxide may be used, preferably in combination with alumina.

    摘要翻译： 用于记录/读取（特别是磁性）磁头滑块的烧结材料通过以下方法制备：制备粉末混合物，其包含0.5至6.0重量％的至少一种选自由以下元素组成的组分A和其化合物的组分， 基于总组合物，基本上由2〜12重量％的氧化铒和氧化铝组成的石榴石型化合物分别为0（排除）〜2（含）％，并由式Er 3（Al， Er）2（AlO4）3〜（Er，Al）3Al2（AlO4）3，余量为碳化硅粉末：组分A的元素为Ti，V，Cr，Mn，Mg，Y，Zr，Nb ，Mo，Ba，La，Ce，Gd，Hf，Ta，W，Th和Cs; 并在高压下进行烧结。 可能存在Be，BeO，B和B4C的其他烧结助剂。 对于石榴石型化合物，可以使用铒氧化物，优选与氧化铝组合。

    Composite magnetic head
    10.
    发明授权
    Composite magnetic head 失效
    复合磁头

    公开(公告)号：US4953051A

    公开(公告)日：1990-08-28

    申请号：US247518

    申请日：1988-09-22

    申请人： Toshiaki Wada ,  Masateru Nose ,  Junichi Nakaoka ,  Akio Murata

    发明人： Toshiaki Wada ,  Masateru Nose ,  Junichi Nakaoka ,  Akio Murata

    IPC分类号： G11B5/105 ,  G11B5/127 ,  G11B5/31 ,  G11B5/48

    CPC分类号： G11B5/3186 ,  G11B5/105 ,  G11B5/1278 ,  G11B5/3103 ,  G11B5/3176 ,  G11B5/488

    摘要： A composite magnetic head is disclosed which is characterized by the fact that a magnetic head slider part and magnetic head core pieces both made of non-magnetic ceramic and provided on each of the opposed surfaces thereof with at least one layer of soft magnetic film produced in the form of sheet and subsequently shaped as required are integrally joined through the medium of glass members interposed between the opposed surfaces so as to give rise to a magnetic gap and an electromagnetic transducer coil is wound on the magnetic head core pieces.A composite magnetic head is further disclosed which is characterized by the fact that a magnetic head slider part and magnetic head core pieces, one made of an oxide magnetic material and the other made of a non-magnetic ceramic, are integrally joined through the medium of glass members interposed between pertinent opposed surfaces so as to give rise to a magnetic gap, the member made of the non-magnetic ceramic is provided on the opposed surface thereof with at least one layer of soft magnetic film produced in the form of sheet and subsequently shaped as required, and an electromagnetic transducer coil is wound on the magnetic head core pieces.

    摘要翻译： 公开了一种复合磁头，其特征在于磁头滑块部分和磁头芯片均由非磁性陶瓷制成，并且在其相对的每个表面上设置有至少一层软磁膜， 通过介于相对表面之间的玻璃构件的介质将片材的形状随后成形为一体，从而产生磁隙，并将电磁换能器线圈缠绕在磁头芯片上。 进一步公开了一种复合磁头，其特征在于，磁头滑块部分和磁头芯片，一个由氧化物磁性材料制成，另一个由非磁性陶瓷制成，通过介质 玻璃构件插入在相对的相对表面之间以产生磁隙，由非磁性陶瓷制成的构件在其相对表面上设置有至少一层以薄片形式制造的软磁膜，随后 并且电磁换能器线圈缠绕在磁头芯片上。