公开(公告)号：US06795275B2

公开(公告)日：2004-09-21

申请号：US10330368

申请日：2002-12-30

申请人： Hidetoshi Anan ,  Tetsuya Matsusaki ,  Hidekazu Kohira ,  Yoshihiro Shiroishi ,  Masaaki Matsumoto ,  Hideaki Tanaka ,  Teruyoshi Higashiya ,  Kiyoshi Hashimoto ,  Akira Matsuda ,  Takanori Yamazaki

发明人： Hidetoshi Anan ,  Tetsuya Matsusaki ,  Hidekazu Kohira ,  Yoshihiro Shiroishi ,  Masaaki Matsumoto ,  Hideaki Tanaka ,  Teruyoshi Higashiya ,  Kiyoshi Hashimoto ,  Akira Matsuda ,  Takanori Yamazaki

IPC分类号： G11B560

CPC分类号： G11B5/6005 ,  G11B5/6082

摘要： A magnetic disk device, which is provided with a magnetic head slider mounted with a magnetic head and a magnetic disk, and of which the magnetic head slider has the possibility of contacting the magnetic disk at the vicinity of the magnetic head. The magnetic head slider has the size of 1.25 mm or less in length, 1 mm or less in width and 0.3 mm or less in thickness, and the friction force exerted between the magnetic head slider and the magnetic disk is 10 mN or less. The magnetic head comprises four substantially parallel surfaces and the depth from a first surface which is the most adjacent surface to the magnetic disk to a second surface is 10 nm to 50 nm, the depth from the second surface to a third surface is 50 nm to 200 nm, and the depth from the third surface to a fourth surface is 400 nm to 1 &mgr;m.

摘要翻译： 一种磁盘装置，其设置有安装有磁头和磁盘的磁头滑块，并且其磁头滑块具有与磁头附近的磁盘接触的可能性。 磁头滑块的长度为1.25mm以下，宽度为1mm以下，厚度为0.3mm以下，磁头滑块与磁盘之间的摩擦力为10mN以下。 磁头包括四个基本上平行的表面，并且从第一表面到与磁盘最相邻的表面到第二表面的深度为10nm至50nm，从第二表面到第三表面的深度为50nm至 200nm，从第三面至第四面的深度为400nm〜1μm。

公开(公告)号：US06498702B1

公开(公告)日：2002-12-24

申请号：US09510339

申请日：2000-02-22

申请人： Hayato Shimizu ,  Norio Nakazato ,  Masaaki Matsumoto ,  Yoshihiro Shiroishi ,  Mikio Tokuyama ,  Toshihiko Shimizu ,  Shigeo Nakamura

发明人： Hayato Shimizu ,  Norio Nakazato ,  Masaaki Matsumoto ,  Yoshihiro Shiroishi ,  Mikio Tokuyama ,  Toshihiko Shimizu ,  Shigeo Nakamura

IPC分类号： G11B548

CPC分类号： G11B5/486 ,  G11B5/4833

摘要： A magnetic head supporting apparatus includes a magnetic head for reading and writing information on a magnetic disc, a slider having the magnetic head, and a suspension for supporting the slider. An IC chip for controlling a signal of the magnetic head is mounted on a first surface of a heat insulating substrate, and a second surface of the heat insulating substrate opposite to the first surface thereof is mounted to the suspension.

摘要翻译： 磁头支撑装置包括用于在磁盘上读取和写入信息的磁头，具有磁头的滑块和用于支撑滑块的悬架。 用于控制磁头的信号的IC芯片安装在绝热基板的第一表面上，并且与其第一表面相对的绝热基板的第二表面安装在悬架上。

公开(公告)号：US06618225B2

公开(公告)日：2003-09-09

申请号：US10288482

申请日：2002-11-06

申请人： Hayato Shimizu ,  Norio Nakazato ,  Masaaki Matsumoto ,  Yoshihiro Shiroishi ,  Mikio Tokuyama ,  Toshihiko Shimizu ,  Shigeo Nakamura

发明人： Hayato Shimizu ,  Norio Nakazato ,  Masaaki Matsumoto ,  Yoshihiro Shiroishi ,  Mikio Tokuyama ,  Toshihiko Shimizu ,  Shigeo Nakamura

IPC分类号： G11B548

CPC分类号： G11B5/486 ,  G11B5/4833

摘要： A magnetic head supporting apparatus having a magnetic head for reading and writing information on a magnetic disc, a slider for mounting the magnetic head, and a suspension for supporting the slider. An IC chip for controlling a signal of the magnetic head is mounted on a heat insulating substrate which substantially prevents conduction of heat therethough, and the heat insulating substrate is mounted to the suspension.

摘要翻译： 一种具有用于在磁盘上读取和写入信息的磁头的磁头支撑装置，用于安装磁头的滑块和用于支撑滑块的悬架。 用于控制磁头的信号的IC芯片安装在绝热基板上，其基本上防止了热传导，绝热基板安装在悬架上。

公开(公告)号：US5835305A

公开(公告)日：1998-11-10

申请号：US353983

申请日：1994-12-06

申请人： Tetsuya Hamaguchi ,  Yoshihiro Shiroishi ,  Yukio Kato ,  Masaaki Matsumoto ,  Hiromitsu Tokisue ,  Takayuki Nakakawaji ,  Shuji Imazeki

发明人： Tetsuya Hamaguchi ,  Yoshihiro Shiroishi ,  Yukio Kato ,  Masaaki Matsumoto ,  Hiromitsu Tokisue ,  Takayuki Nakakawaji ,  Shuji Imazeki

IPC分类号： G11B5/60 ,  G11B5/58

CPC分类号： G11B5/581

摘要： A magnetic storage apparatus includes a substantially non-flexible magnetic recording medium, a magnetic head slider having a reading/writing element mounted therein and liquid lubricant provided on the surface of the magnetic recording medium. The liquid lubricant is a liquid in a Newtonian range having a viscosity which is substantially constant irrespective of a shear rate or a liquid having the property that the actual viscosity is increased with increase of the shear rate. The magnetic head slider maintains a gap between the slider and the magnetic recording medium to perform reading and writing while being moved on the liquid lubricant intermittently or continuously in a contact manner with the liquid lubricant. There is provided a device for maintaining a constant flying height even if a movement speed is varied, which flying height is represented by the size of the gap. Thus, the magnetic storage apparatus of the liquid bearing system or the contact system has only very small forces such as liquid drag force and friction force or sticking force and is capable of performing stable slider movement, performing high-speed seeking operation with high reliability and performing high-density recording.

摘要翻译： 磁性存储装置包括基本上非柔性的磁记录介质，具有安装在其中的读/写元件的磁头滑块和设置在磁记录介质表面上的液体润滑剂。 液体润滑剂是牛顿范围内的液体，其粘度基本上恒定，与剪切速率无关，或液体具有实际粘度随着剪切速率的增加而增加的性质。 磁头滑动器在滑动器和磁记录介质之间保持间隙，以便以与液体润滑剂接触的方式间歇地或连续地在液体润滑剂上移动来进行读写。 提供了一种用于保持恒定飞行高度的装置，即使移动速度变化，飞行高度由间隙的大小表示。 因此，液体轴承系统或接触系统的磁存储装置仅具有非常小的力，例如液体拖曳力和摩擦力或粘着力，并且能够执行稳定的滑块移动，以高可靠性执行高速寻找操作， 执行高密度录音。

公开(公告)号：US07903374B2

公开(公告)日：2011-03-08

申请号：US12816093

申请日：2010-06-15

申请人： Yoshihiro Shiroishi

发明人： Yoshihiro Shiroishi

IPC分类号： G11B5/147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/09 ,  G11B5/313 ,  G11B5/3909 ,  G11B5/3967 ,  G11B5/484 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/3996

摘要： A magnetic recording and reading device includes a perpendicular magnetic recording medium, a perpendicular magnetic head having a recording head width having a heat-generating portion and a reading head, a fine adjustment portion, and a R/W-IC. The perpendicular magnetic head is configured to perform magnetic recording on the recording medium while locally heating the recording medium so as to enable a change of the coercive force of the recording medium during the recording after correcting of the position of the perpendicular magnetic head by the fine adjustment portion is completed, and to perform reading of the magnetic recording information with the aid of the reading head after correcting of the position of the perpendicular magnetic head by the fine adjustment portion is completed.

摘要翻译： 磁记录和读取装置包括垂直磁记录介质，具有发热部分和读头的记录头宽度的垂直磁头，微调部分和R / W-IC。 垂直磁头被配置为在记录介质上执行磁记录，同时局部加热记录介质，以便在校正垂直磁头的位置之后能够在记录期间改变记录介质的矫顽力 调整部分完成，并且在通过微调部分校正垂直磁头的位置之后，借助于读取头来执行磁记录信息的读取。

公开(公告)号：US5815343A

公开(公告)日：1998-09-29

申请号：US967346

申请日：1997-10-27

申请人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

发明人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/62 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/78 ,  G11B5/82 ,  G11B17/00

CPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

摘要： A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.

摘要翻译： 磁记录介质包括非磁性衬底和设置在非磁性衬底上的磁性层。 在记录方向上确定的磁性层的剩余磁通密度Br1和磁性层的厚度δ的乘积Br1δ的值不小于5Gm且不大于180Gm; 在平行于基板平面并垂直于记录方向Br1 / Br2的方向上确定的Br1与剩余通量密度Br2的比值不小于1.3且不大于3; 非磁性基板的表面具有主要在记录方向上延伸的织构槽; 并且在垂直于基板平面并垂直于记录方向的方向上确定的磁性层的表面的平均粗糙度Ra不小于0.3nm且不大于1.9nm。 或者，在记录方向上确定的磁性层的剩余磁通密度Br和磁性层的厚度δ的乘积Br delta的值不小于5Gm且不大于80Gm; 并且磁记录介质的各向异性磁场Hk的值不小于7kOe且不大于20kOe。

公开(公告)号：US4950548A

公开(公告)日：1990-08-21

申请号：US355351

申请日：1989-05-23

申请人： Kenji Furusawa ,  Katsuo Abe ,  Hiroyuki Kataoka ,  Tokuho Takagaki ,  Yoshihiro Shiroishi ,  Norikazu Tsumita

发明人： Kenji Furusawa ,  Katsuo Abe ,  Hiroyuki Kataoka ,  Tokuho Takagaki ,  Yoshihiro Shiroishi ,  Norikazu Tsumita

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/667 ,  G11B5/72 ,  G11B5/73 ,  G11B5/738 ,  G11B5/851

CPC分类号： G11B5/656 ,  G11B5/72 ,  G11B5/738 ,  G11B5/851 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12625 ,  Y10T428/12639 ,  Y10T428/12847 ,  Y10T428/12861 ,  Y10T428/12931

摘要： The present invention relates to a magnetic recording medium for a magnetic disk unit or the like and, more particularly, to a magnetic recording medium having its recording layer made of a magnetic alloy film with uniform magnetic characteristics. The present magnetic recording medium comprises a non-magnetic substrate, at least two sputtered layers of chromium thin film having a bow-like columnar structure which chromium thin film is laminated on the substrate, another sputtered layer of a magnetic alloy thin film laminated on the chromium thin film, and a protective layer laminated on the magnetic alloy thin film. The present invention is effective in reducing modulation of regenerative output relatively independent of a texture roughness of the substrate.

摘要翻译： 本发明涉及一种用于磁盘单元等的磁记录介质，更具体地说，涉及一种具有由具有均匀磁特性的磁性合金膜制成的记录层的磁记录介质。 本磁记录介质包括非磁性基板，至少两个具有弓形柱状结构的铬薄膜溅射层，该铬薄膜层叠在基板上，另一层叠在该基板上的磁性合金薄膜溅射层 铬薄膜和层叠在磁性合金薄膜上的保护层。 本发明可有效地减少再生输出的调制，而不依赖于衬底的纹理粗糙度。

公开(公告)号：US4842917A

公开(公告)日：1989-06-27

申请号：US88380

申请日：1987-08-24

申请人： Tomoyuki Ohno ,  Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Hiroyuki Suzuki ,  Takaaki Shirakura ,  Shinya Matsuoka ,  Makoto Sano ,  Takao Nakamura ,  Kazumasa Takagi ,  Tokuumi Fukazawa ,  Kenzo Susa

发明人： Tomoyuki Ohno ,  Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Hiroyuki Suzuki ,  Takaaki Shirakura ,  Shinya Matsuoka ,  Makoto Sano ,  Takao Nakamura ,  Kazumasa Takagi ,  Tokuumi Fukazawa ,  Kenzo Susa

IPC分类号： G11B5/73

CPC分类号： G11B5/7325 ,  Y10S428/90 ,  Y10T428/24355

摘要： A magnetic recording medium having a magnetic film formed on a substrate directly or through an underlayer from an alloy containing Co as a principal component. The central line average surface roughness Ra and maximum surface roughness Rmax of the magnetic film in a direction perpendicular to the direction of magnetic recording are selected so as to fall within the ranges of 1 nm.ltoreq.Ra.ltoreq.20 nm and Rmax.ltoreq.25 Ra, respectively, and the in-plane magnetic anisotropy energy Ku of the magnetic film is selected to fall within the range of 0.ltoreq.Ku.ltoreq.8.times.10.sup.5 erg/cm.sup.3. Thus, it is possible to minimize the value of modulation which represents the degree of variation of read output on the same circumference of a magnetic disk. It is also possible to reduce the noise generated in read and write operations by forming the magnetic film so as have no crystallographic orientation.

摘要翻译： 一种磁记录介质，其具有直接或通过底层从基板上形成的含有Co作为主要成分的合金的磁性膜。 选择磁性膜在垂直于磁记录方向的方向上的中心线平均表面粗糙度Ra和最大表面粗糙度Rmax，使其落入1nm≤Ra<20nm的范围内，并且Rmax < / = 25Ra，磁性膜的面内磁各向异性能Ku被选择在0≤K≤5×10 5Ω/ cm 3的范围内。 因此，可以将表示在磁盘的同一圆周上的读取输出的变化程度的调制值最小化。 也可以通过形成磁性膜来减少读取和写入操作中产生的噪声，从而没有结晶取向。

公开(公告)号：US4651248A

公开(公告)日：1987-03-17

申请号：US500907

申请日：1983-06-03

申请人： Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuito ,  Kiminari Shinagawa ,  Hideo Fujiwara

发明人： Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuito ,  Kiminari Shinagawa ,  Hideo Fujiwara

IPC分类号： G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/23 ,  G11B5/147 ,  G11B5/187

CPC分类号： G11B5/3143 ,  G11B5/1278 ,  G11B5/31

摘要： A thin-film magnetic head which has a structure wherein a spiral conductor coil having a plurality of turns is disposed between first and second magnetic layers being substantially in parallel with each other, through upper and lower inorganic insulator layers, and in which a part of the outermost turn of the conductor coil is exposed on a face opposite a magnetic recording medium along with the upper and lower inorganic insulator layers, to form a magnetic gap. This head can be readily manufactured by a manufacturing method including the step of forming the outermost turn of the conductor coil on the side of the face opposite the magnetic recording medium so as to be wider than any other part of the conductor coil, and the step of thereafter machining the face opposite the magnetic recording medium so as to expose the outermost turn of the conductor coil on the face opposite the magnetic recording medium. The magnetic head of the present invention is suited to high-density recording, and is high in recording and reproducing efficiencies and also in reliability.

摘要翻译： 具有以下结构的薄膜磁头：其中具有多个匝的螺旋导体线圈通过上下无机绝缘体层彼此基本上彼此平行地设置在第一和第二磁性层之间，并且其中一部分 导体线圈的最外圈与上下无机绝缘体层一起在与磁记录介质相对的面上露出，形成磁隙。 该头可以容易地通过制造方法制造，该方法包括以下步骤：在与磁记录介质相对的面的一侧形成导体线圈的最外圈，以便比导体线圈的任何其它部分宽，并且步骤 之后加工与磁记录介质相对的面，以便暴露在与磁记录介质相对的表面上的导体线圈的最外圈。 本发明的磁头适用于高密度记录，记录和再现效率高，可靠性高。

公开(公告)号：US4439794A

公开(公告)日：1984-03-27

申请号：US264706

申请日：1981-05-18

申请人： Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Takeshi Kimura ,  Noriyuki Kumasaka ,  Nobuo Kobayashi ,  Takeo Yamashita ,  Teizo Tamura ,  Hideo Zama ,  Mitsuhiro Kudo ,  Tsutomu Iimura

发明人： Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Takeshi Kimura ,  Noriyuki Kumasaka ,  Nobuo Kobayashi ,  Takeo Yamashita ,  Teizo Tamura ,  Hideo Zama ,  Mitsuhiro Kudo ,  Tsutomu Iimura

IPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/193 ,  G11B5/23 ,  G11B5/251 ,  G11B5/14

CPC分类号： G11B5/133 ,  G11B5/193

摘要： A magnetic head which uses single crystal Mn-Zn ferrite containing up to 7% by weight of SnO.sub.2 occluded therein without being allowed to separate and which has such a construction that glass having a contraction rate lower than that of ferrite is filled in the narrowed portion near the gap, the plane forming the principal magnetic circuit of the core is allowed to coincide with the {110} plane of the ferrite and an angle .theta. between the direction inside the {110} plane of the ferrite and the gap-forming plane is from 5.degree. to 40.degree. or 85.degree. to 120.degree.. The magnetic head having such a construction has a reduced modulation noise and extremely excellent write-and-read characteristics.

摘要翻译： 使用含有高达7重量％的SnO 2的单晶Mn-Zn铁氧体的磁头，其不被分离，并且具有这样的结构，即将收缩率低于铁素体的玻璃填充到变窄部分 在间隙附近，形成芯的主磁路的平面允许与铁素体的{110}平面和铁氧体的{110}平面内的<100>方向之间的角度θ与间隙 - 成型面为5°〜40°或85°〜120°。 具有这种结构的磁头具有降低的调制噪声和极好的写和读特性。