公开(公告)号：US5347712A

公开(公告)日：1994-09-20

申请号：US76191

申请日：1993-06-14

申请人： Nobuyuki Yasuda ,  Toshio Tamura ,  Hiroshi Toi ,  Akio Mishima

发明人： Nobuyuki Yasuda ,  Toshio Tamura ,  Hiroshi Toi ,  Akio Mishima

IPC分类号： H05K1/11 ,  H05K3/00 ,  H05K3/40 ,  H05K3/42 ,  H05K3/46 ,  H01K3/10

CPC分类号： H05K3/0044 ,  H05K1/115 ,  H05K3/4652 ,  H05K2201/0355 ,  H05K2201/0394 ,  H05K2201/09509 ,  H05K2201/09518 ,  H05K2201/09809 ,  H05K2201/09845 ,  H05K2203/025 ,  H05K2203/0554 ,  H05K3/429 ,  Y10T29/49155 ,  Y10T29/49165

摘要： A multilayer wiring board and a method for manufacturing the same are disclosed. The wiring board comprises an insulating substrate having a first and second conductor layers formed on major surfaces of the insulating substrate, a blind hole formed through the first conductor layer and the insulating substrate to expose the second conductor layer at the bottom of the blind hole, and a connecting conductor provided to cover the exposed surface of the second conductor layer wall portion of the blind hole and the first conductor layer. Since the connecting conductor and the second conductor are made in surface contact, connection reliability is very much improved. The blind hole is made by blasting a fine abrasive powder beam to selectively remove the insulating substrate. The end of selective removal can be easily controlled by the difference of working speed against the insulating substrate and the conductor layer to successfully expose the second conductor layer at the bottom of the blind hole.

摘要翻译： 公开了一种多层布线板及其制造方法。 所述布线基板包括绝缘基板，所述绝缘基板具有形成在所述绝缘基板的主表面上的第一和第二导体层，通过所述第一导体层形成的盲孔和所述绝缘基板，以露出所述盲孔底部的所述第二导体层， 以及连接导体，被设置为覆盖盲孔的第二导体层壁部分和第一导体层的暴露表面。 由于连接导体和第二导体形成表面接触，所以连接可靠性得到非常大的改善。 盲孔通过喷射细磨料粉末束来选择性地去除绝缘基底而制成。 可以通过与绝缘基板和导体层的工作速度的差异容易地控制选择性去除的结束，以成功地暴露在盲孔底部的第二导体层。

公开(公告)号：US5150511A

公开(公告)日：1992-09-29

申请号：US708388

申请日：1991-05-31

申请人： Katsumi Sakata ,  Tatsuo Kumura ,  Atsushi Suzuki ,  Yoshito Ikeda ,  Kaoru Aoki ,  Naoto Kojima ,  Akio Mishima

发明人： Katsumi Sakata ,  Tatsuo Kumura ,  Atsushi Suzuki ,  Yoshito Ikeda ,  Kaoru Aoki ,  Naoto Kojima ,  Akio Mishima

IPC分类号： G11B5/127 ,  G11B5/187 ,  G11B5/23

CPC分类号： G11B5/232 ,  G11B5/1272 ,  G11B5/187 ,  Y10T29/49055

摘要： A method for manufacturing a magnetic transducer head in which a track width regulating grooves provided on both edges of a magnetic gap are filled by blowing a powder beam of nonmagnetic material having a very fine particle size to deposit the nonmagnetic material in the grooves. A pair of magnetic core members are bonded together to form a magnetic gap therebetween by providing a metal layer of a bonding surface of the core members and applying a pressure to the core members under an elevated temperature to cause a mutual diffusion of the metal to bond the core members together. Thus the magnetic transducer head can be made without using a high-temperature heat treatment.

公开(公告)号：US4858048A

公开(公告)日：1989-08-15

申请号：US85322

申请日：1987-08-10

申请人： Kiyonori Hayakawa ,  Akio Mishima

发明人： Kiyonori Hayakawa ,  Akio Mishima

IPC分类号： G11B5/127

CPC分类号： G11B5/1278

摘要： A complex magnetic transducer head with a single magnetic pole includes a recording and reproducing main magnetic pole made of a thin film of soft magnetic material with a predetermined width and in contact with a magnetic recording medium. A non-magnetic guard member is adjacent each side of the recording and reproducing main magnetic pole and a magnetic core portion is integrated with each guard member. Grooves are formed in the magnetic core portion for separating a first auxiliary magnetic pole portion in contact with the recording and reproducing main magnetic pole from a magnetic flux return path portion. The winding is wound around the recording reproducing main magnetic pole through the grooves. An erasing head portion having a pair of erasing main magnetic poles faces the magnetic record medium and is spaced from the recording and reproducing main magnetic pole by a predetermined distance along the running direction of the magnetic record medium, and the pair of erasing main magnetic poles are spaced apart in a direction transverse to the running direction by a distance smaller than the width of the recording and reproducing main magnetic pole. A erasing winding is provided for exciting the erasing main magnetic poles. Previously recorded data on the magnetic record medium is erased, despite small displacements which may occur between the previously recorded track on the magnetic record medium and the recording and reproducing main magnetic pole.

摘要翻译： 具有单个磁极的复合磁传感器头包括由具有预定宽度的软磁材料薄膜制成的与磁记录介质接触的记录和再现主磁极。 非磁性保护构件与记录和再现主磁极的每一侧相邻，并且磁芯部分与每个防护构件一体化。 沟槽形成在磁芯部分中，用于从磁通返回路径部分分离与记录和再现主磁极接触的第一辅助磁极部分。 绕组通过凹槽缠绕在记录再现主磁极上。 具有一对擦除主磁极的擦除头部部分面向磁记录介质，并且与记录和再现主磁极沿着磁记录介质的运行方向隔开预定距离，并且一对擦除主磁极 在横向于运行方向的方向上间隔开距离小于记录和再现主磁极的宽度的距离。 提供擦除绕组以激励擦除主磁极。 尽管在磁记录介质上的先前记录的轨道与记录和再现主磁极之间可能发生较小位移，但是磁记录介质上的先前记录的数据被擦除。

公开(公告)号：US4773931A

公开(公告)日：1988-09-27

申请号：US8113

申请日：1987-01-23

申请人： Akio Mishima ,  Yosiro Okuda ,  Hiroshi Sumita ,  Yoshitaka Yoshinaga ,  Akira Mukaizaka ,  Tokihiro Kurata

发明人： Akio Mishima ,  Yosiro Okuda ,  Hiroshi Sumita ,  Yoshitaka Yoshinaga ,  Akira Mukaizaka ,  Tokihiro Kurata

IPC分类号： B22F9/22 ,  C22C33/02 ,  G11B5/706 ,  H01F1/06 ,  B22F1/00

CPC分类号： B22F9/22 ,  C22C33/0257 ,  G11B5/70615 ,  H01F1/065

摘要： Disclosed herein is spindle ferromagnetic alloy particles having the aspect ratio (major:minor) of less than 3:1 and the coercive force of 500 to 100 Oe, and containing 0.1 to 13 atomic % of Si to Fe, and a process for producing the same.

摘要翻译： 本文公开了具有小于3:1的纵横比（主要：次要）小于3:1的矫顽力和500至100Oe的矫顽力并且含有0.1至13原子％的Si与Fe的锭心铁磁合金颗粒，以及用于制备 相同。

公开(公告)号：US4437881A

公开(公告)日：1984-03-20

申请号：US513866

申请日：1983-07-14

申请人： Akio Mishima ,  Yoshiro Okuda ,  Tosiharu Harada ,  Akira Mukaizaka ,  Tomoyuki Imai

发明人： Akio Mishima ,  Yoshiro Okuda ,  Tosiharu Harada ,  Akira Mukaizaka ,  Tomoyuki Imai

IPC分类号： G11B5/706 ,  B22F9/22

CPC分类号： G11B5/70615

摘要： Acicular ferromagnetic alloy particles doped with silicon, chromium and nickel and optionally magnesium and a process for producing said particles comprising heating at 300.degree. to 500.degree. C. under reducing atmosphere acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium or acicular particles of .alpha.-ferric oxide doped with silicon, chromium and nickel and optionally magnesium obtained by dehydrating the acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium are disclosed herein.

摘要翻译： 掺杂有硅，铬和镍以及任选的镁的针状铁磁性合金颗粒和一种制备所述颗粒的方法，包括在还原性气氛下在300℃至500℃下加热掺杂有硅，铬（III）的α-铁氧化物氢氧化物的针状颗粒 公开了镍和任选的掺有硅，铬和镍的α-氧化铁的镁或针状颗粒和任选的镁，其通过使掺杂有硅，铬和镍以及任选的镁的α-铁（III）氧化物氢氧化物的针状颗粒脱水获得， 这里。