公开(公告)号：US06324035B2

公开(公告)日：2001-11-27

申请号：US09836481

申请日：2001-04-18

申请人： Yoshihiro Shiroishi

发明人： Yoshihiro Shiroishi

IPC分类号： G11B531

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 having a magnetic head assembly in which a magnetic head is mounted on a suspension, an R/W-IC having a line width of not more than 0.35 &mgr;m and a magnetic disk medium having a magnetic recording layer formed on a substrate. The magnetic head assembly has an inductance of not more than 65 nH and has a magnetic path with a length of not more than 35 &mgr;m, wherein a part of the magnetic path is provided with a magnetic film or a multi-layer film consisting of a magnetic film and a non magnetic layer. The magnetic film and the multi-layer film have a resistivity of more than 50 &mgr;&OHgr;cm.

摘要翻译： 一种具有磁头组件的磁记录和读取装置，其中磁头安装在悬架上，具有不大于0.35μm的线宽的R / W-IC和形成有磁记录层的磁盘介质 底物。 磁头组件具有不大于65nH的电感并且具有不大于35μm的长度的磁路，其中一部分磁路设置有磁性膜或多层膜，所述多层膜由 磁性膜和非磁性层。 磁性膜和多层膜的电阻率大于50μΩEGcm。

公开(公告)号：US5851643A

公开(公告)日：1998-12-22

申请号：US832330

申请日：1997-03-26

申请人： Yukio Honda ,  Nobuyuki Inaba ,  Mikio Suzuki ,  Masaaki Futamoto ,  Hiroyuki Awano ,  Yoshibumi Matsuda ,  Yoshihiro Shiroishi

发明人： Yukio Honda ,  Nobuyuki Inaba ,  Mikio Suzuki ,  Masaaki Futamoto ,  Hiroyuki Awano ,  Yoshibumi Matsuda ,  Yoshihiro Shiroishi

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12632 ,  Y10T428/12674 ,  Y10T428/12806 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/1284 ,  Y10T428/12847 ,  Y10T428/12875 ,  Y10T428/12931 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24975 ,  Y10T428/265

摘要： A magnetic recording media with a magnetic film made from at least two layers stacked via a non-magnetic intermediate layer, wherein the magnetic film is formed on a structure control underlayer situated on a non-magnetic substrate. A magnetic recording system is also disclosed which includes this magnetic recording media and a magnetic recording head for recording on and reading back from the magnetic recording media. The system further includes a disk drive system, which generates relative motion between the magnetic recording media and the magnetic recording head, and an actuator which determines an appropriate location, on the magnetic recording media, over which the head should be located.

摘要翻译： 一种具有通过非磁性中间层堆叠的至少两层制成的磁膜的磁记录介质，其中所述磁膜形成在位于非磁性基板上的结构控制底层上。 还公开了一种磁记录系统，其包括该磁记录介质和用于在磁记录介质上记录和读回的磁记录头。 该系统还包括一个在磁记录介质和磁记录头之间产生相对运动的磁盘驱动系统，以及致动器，其确定在磁记录介质上应该位于其上的适当位置。

公开(公告)号：US5671107A

公开(公告)日：1997-09-23

申请号：US399221

申请日：1995-03-06

申请人： Katsuya Mitsuoka ,  Hiroshi Fukui ,  Makoto Aihara ,  Masanori Tanabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Yutaka Sugita ,  Yoshihiro Shiroishi ,  Hajime Aoi ,  Yokuo Saitoh ,  Kanji Kawakami ,  Yoshikazu Tsuji ,  Masaaki Hayashi ,  Kazuo Nakagoshi

发明人： Katsuya Mitsuoka ,  Hiroshi Fukui ,  Makoto Aihara ,  Masanori Tanabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Yutaka Sugita ,  Yoshihiro Shiroishi ,  Hajime Aoi ,  Yokuo Saitoh ,  Kanji Kawakami ,  Yoshikazu Tsuji ,  Masaaki Hayashi ,  Kazuo Nakagoshi

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/31 ,  G11B5/60

CPC分类号： G11B5/012 ,  G11B5/39

摘要： A magnetic disc apparatus has a large recording density of 120 megabits per square inch or more, and defines a relationship among a pole thickness (Pt) of thin-film magnetic heads disposed in the magnetic disc apparatus, and a saturation flux density (Bs) of cores of the heads and a recording wavelength (.lambda.) for the thin film magnetic discs have a coercivity of 1800 Oe or more, wherein a levitation space between the head and the disc is 0.15 .mu.m or less.

摘要翻译： 磁盘装置具有120兆比特每平方英寸或更大的记录密度，并且限定了设置在磁盘装置中的薄膜磁头的极厚度（Pt）与饱和磁通密度（Bs）之间的关系， 的磁头的磁芯和用于薄膜磁盘的记录波长（λ）具有1800Oe或更高的矫顽力，其中磁头和磁盘之间的悬浮空间为0.15μm或更小。

公开(公告)号：US5665478A

公开(公告)日：1997-09-09

申请号：US328400

申请日：1994-10-24

申请人： Hiroyuki Suzuki ,  Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Tomoyuki Ohno ,  Yotsuo Yahisa ,  Yoshibumi Matsuda ,  Norikazu Tsumita ,  Masaki Ohura ,  Takaaki Shirakura ,  Noriyuki Shige ,  Kazumasa Takagi

发明人： Hiroyuki Suzuki ,  Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Tomoyuki Ohno ,  Yotsuo Yahisa ,  Yoshibumi Matsuda ,  Norikazu Tsumita ,  Masaki Ohura ,  Takaaki Shirakura ,  Noriyuki Shige ,  Kazumasa Takagi

IPC分类号： G11B5/64 ,  G11B5/73 ,  H01F1/00

CPC分类号： G11B5/7325 ,  G11B5/656 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12861

摘要： A magnetic recording medium for longitudinal recording with a low media noise, a high S/N ratio and high reliabilities in corrosion resistance is disclosed. By making a magnetic layer from a Co-based alloy comprising 1 to 35 at. % of at least one element selected from the group consisting of Pt and Ir, 1 to 17 at. % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Ge and Si, except for Si, whose concentration is 1 to 40 at. %, and 0.1 to 10 at. % of oxygen, a magnetic recording medium for longitudinal recording having an inplane coercivity of 1,200 Oe or more and a coercive squares of not more than 0.85 is obtained.

摘要翻译： 公开了一种用于具有低介质噪声，高S / N比和高可靠性的耐腐蚀性的纵向记录用磁记录介质。 通过从包含1至35at。的Co基合金制备磁性层。 选自Pt和Ir中的至少一种元素的％，1至17at。 ％的选自Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W，Ge和Si中的至少一种元素，Si除外，其浓度为1〜40at。 ％，0.1〜10at。 获得氧的百分比，用于纵向记录的磁记录介质，其平面矫顽力为1200奥斯或更高，矫顽正方形不大于0.85。

公开(公告)号：US5143794A

公开(公告)日：1992-09-01

申请号：US391181

申请日：1989-08-08

申请人： Hiroyuki Suzuki ,  Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Tomoyuki Ohno ,  Yotsuo Yahisa ,  Yoshibumi Matsuda ,  Norikazu Tsumita ,  Masaki Ohura ,  Takaaki Shirakura ,  Noriyuki Shige ,  Kazumasa Takagi

发明人： Hiroyuki Suzuki ,  Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Tomoyuki Ohno ,  Yotsuo Yahisa ,  Yoshibumi Matsuda ,  Norikazu Tsumita ,  Masaki Ohura ,  Takaaki Shirakura ,  Noriyuki Shige ,  Kazumasa Takagi

IPC分类号： G11B5/64 ,  G11B5/73

CPC分类号： G11B5/7325 ,  G11B5/656 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12861

摘要： A magnetic recording medium for longitudinal recording with a low media noise, a high S/N ratio and high reliabilities in corrosion resistance is disclosed. By making a magnetic layer from a Co-based alloy comprising 1 to 35 at. % of at least one element selected from the group consisting of Pt and Ir, 1 to 17 at. % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W. Ge and Si, except for Si, whose concentration is 1 to 40 at. %, and 0.1 to 10 at. % of oxygen, a magnetic recording medium for longitudinal recording having an inplane coercivity of 1,200 Oe or more and a coercive squares of not more than 0.85 is obtained.A process for producing the magnetic recording medium for longitudinal medium and a magnetic memory apparatus using the magnetic recording medium for longitudinal recording are also disclosed.

摘要翻译： 公开了一种用于具有低介质噪声，高S / N比和高可靠性的耐腐蚀性的纵向记录用磁记录介质。 通过从包含1至35at。的Co基合金制备磁性层。 选自Pt和Ir中的至少一种元素的％，1至17at。 ％的选自Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W.Ge和Si中的至少一种元素，Si除外，其浓度为1至40at。 ％，0.1〜10at。 获得氧的百分比，用于纵向记录的磁记录介质，其平面矫顽力为1200奥斯或更高，矫顽正方形不大于0.85。 还公开了用于制造用于纵向介质的磁记录介质的方法和使用用于纵向记录的磁记录介质的磁存储装置。

公开(公告)号：US4833020A

公开(公告)日：1989-05-23

申请号：US149678

申请日：1988-01-28

申请人： Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Hiroyuki Suzuki ,  Tomoyuki Ohno ,  Yoshibumi Matsuda ,  Kazumasa Takagi ,  Yoshio Gobara ,  Norikazu Tsumita ,  Masaki Ohura ,  Masaaki Hayashi

发明人： Yoshihiro Shiroishi ,  Sadao Hishiyama ,  Hiroyuki Suzuki ,  Tomoyuki Ohno ,  Yoshibumi Matsuda ,  Kazumasa Takagi ,  Yoshio Gobara ,  Norikazu Tsumita ,  Masaki Ohura ,  Masaaki Hayashi

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

CPC分类号： G11B5/7325 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265

摘要： In a magnetic recording medium including an underlayer and a magnetic layer formed sequentially on a substrate, the underlayer is composed of a composite underlayer having an at least two-layered structure, the underlayer on the side of the substrate is made of a material providing low modulation to the magnetic recording medium while the underlayer on the side of the magnetic layer is made of a material providing a high S/N ratio to the medium. This makes it possible to obtain a magnetic recording medium having low modulation and high S/N ratio.

摘要翻译： 在包括在基板上顺序形成的底层和磁性层的磁记录介质中，底层由具有至少两层结构的复合底层构成，底层侧的底层由提供低的材料制成 调制到磁记录介质，而磁层的底层由介质提供高S / N比的材料制成。 这使得可以获得具有低调制和高S / N比的磁记录介质。

公开(公告)号：US4636897A

公开(公告)日：1987-01-13

申请号：US539386

申请日：1983-10-06

申请人： Hitoshi Nakamura ,  Kasuo Shiiki ,  Isamu Yuito ,  Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Kiminari Shinagawa ,  Akemi Iijima

发明人： Hitoshi Nakamura ,  Kasuo Shiiki ,  Isamu Yuito ,  Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Kiminari Shinagawa ,  Akemi Iijima

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/23 ,  G11B5/147 ,  G11B5/187 ,  G11B5/235

CPC分类号： G11B5/1278

摘要： A perpendicular magnetic recording and reproducing thin film head of a structure excellent in magnetic characteristics and easy of fabrication, wherein a lower magnetic layer disposed on a flat nonmagnetic substrate is used as a main magnetic pole, a first insulator layer is formed on the main magnetic pole, a conductor for a coil and a second insulator layer are disposed on the first insulator layer, and an upper magnetic layer which lies in contact with the lower magnetic layer through the first insulator layer at one end thereof and directly at the other end thereof and which overlies the second insulator layer in a part thereof other than both the ends is disposed and used as an auxiliary magnetic pole.

摘要翻译： 磁性特性优良，制造容易的结构的垂直磁记录再生薄膜头，其特征在于，使用设置在平面非磁性基板上的下部磁性层作为主磁极，在主磁体上形成第一绝缘体层 极，用于线圈的导体和第二绝缘体层设置在第一绝缘体层上，并且上磁性层通过第一绝缘体层在其一端直接与下磁性层接触，并且在另一端处 并且在除了两端的部分中的第二绝缘体层之外的位置被布置并用作辅助磁极。

公开(公告)号：US4631612A

公开(公告)日：1986-12-23

申请号：US513615

申请日：1983-07-14

申请人： Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuito ,  Kiminari Shinagawa ,  Yasutaro Uesaka ,  Hideo Fujiwara ,  Hitoshi Nakamura

发明人： Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuito ,  Kiminari Shinagawa ,  Yasutaro Uesaka ,  Hideo Fujiwara ,  Hitoshi Nakamura

IPC分类号： G11B5/31 ,  G11B5/00 ,  G11B5/02 ,  G11B5/127 ,  G11B5/62

CPC分类号： G11B5/1278 ,  G11B5/00 ,  G11B5/127 ,  G11B5/62

摘要： A magnetic recording and reproducing system comprising (i) a magnetic head including a first magnetic pole whose saturation flux density is at least 7 kG and whose edge face is 0.15-0.5 .mu.m thick, and a second magnetic pole which lies on the same side as the first magnetic pole with respect to a recording medium and whose edge face is at least 10 times thicker than that of the first magnetic pole, and (ii) the perpendicular magnetic recording medium including a perpendicular magnetization layer which has a coercive force of 250-600 Oe. in a direction perpendicular to a plane thereof and which is 0.1-0.5 .mu.m thick.

摘要翻译： 一种磁记录和再现系统，包括（i）磁头，其包括饱和磁通密度至少为7kG并且其边缘面为0.15-0.5μm厚的第一磁极，以及位于同一侧的第二磁极 作为相对于记录介质的第一磁极并且其边缘面比第一磁极的边缘面厚至少10倍，以及（ii）垂直磁记录介质包括矫顽力为250的垂直磁化层 -600 Oe 在垂直于其平面的方向上，厚度为0.1-0.5μm。

公开(公告)号：US4539616A

公开(公告)日：1985-09-03

申请号：US400019

申请日：1982-07-20

申请人： Isamu Yuito ,  Kazuo Shiiki ,  Atsushi Saiki ,  Yoshio Homma ,  Noriyuki Kumasaka ,  Yoshihiro Shiroishi ,  Mitsuhiro Kudo

发明人： Isamu Yuito ,  Kazuo Shiiki ,  Atsushi Saiki ,  Yoshio Homma ,  Noriyuki Kumasaka ,  Yoshihiro Shiroishi ,  Mitsuhiro Kudo

IPC分类号： G11B5/17 ,  G11B5/31 ,  G11B5/22 ,  G11B5/20

CPC分类号： G11B5/313 ,  G11B5/17 ,  Y10T29/49064

摘要： Herein disclosed is a thin film magnetic head which is so constructed that a conductor layer arranged in a non-magnetic insulating layer isolating two magnetic poles and adapted to form a coil of plural turns has a height made larger than the width and gap thereof. A method of fabricating that head includes the step of forming a non-magnetic insulating layer, the step of etching the insulating layer by using a mask layer formed thereover as a mask, the step of depositing a metal for providing a conductor layer, the step of removing the mask layer together with the metal thereover, and the step forming a coating of a non-magnetic insulating layer thereover, thereby to form the conductor layer. The head thus fabricated has its magnetic recording and reproducing characteristics improved.

摘要翻译： 这里公开了一种薄膜磁头，其结构使得布置在隔离两个磁极并适于形成多个匝的线圈的非磁性绝缘层中的导体层具有比其宽度和间隙大的高度。 制造该头的方法包括形成非磁性绝缘层的步骤，通过使用其上形成的掩模层作为掩模蚀刻绝缘层的步骤，沉积用于提供导体层的金属的步骤，步骤 与金属一起除去掩模层，以及在其上形成非磁性绝缘层的涂层的步骤，从而形成导体层。 如此制造的磁头具有改善的磁记录和再现特性。

公开(公告)号：US4450494A

公开(公告)日：1984-05-22

申请号：US304612

申请日：1981-09-22

申请人： Hideo Fujiwara ,  Mitsuhiro Kudo ,  Teizo Tamura ,  Nobuyuki Sugishita ,  Yoshihiro Shiroishi ,  Takeshi Kimura ,  Kiminari Shinagawa ,  Noriyuki Kumasaka

发明人： Hideo Fujiwara ,  Mitsuhiro Kudo ,  Teizo Tamura ,  Nobuyuki Sugishita ,  Yoshihiro Shiroishi ,  Takeshi Kimura ,  Kiminari Shinagawa ,  Noriyuki Kumasaka

IPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/193 ,  G11B5/23 ,  G11B5/245 ,  G11B5/12 ,  G11B5/22

CPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/193

摘要： A magnetic head having a magnetic core formed by facing a pair of magnetic substances through a working gap at a head section confronting a magnetic recording medium is disclosed in which at least one of the magnetic substances has magnetic anisotropy, and an angle .alpha. (in a C-shaped core half) and/or an angle .alpha.' (in an I-shaped core half) between a core surface confronting the magnetic recording medium and a direction having a maximum magnetic permeability in a main magnetic circuit plane of the magnetic substance having magnetic anisotropy is made larger than an orientation angle of the above direction for making minimum the magnetic reluctance of the main magnetic circuit of the magnetic core by .beta. (for .alpha.) and/or .beta.' (for .alpha.') to improve the recording/reproducing characteristic of the magnetic head, where .beta. is given by a formula ##EQU1## is equal to or less than 25.degree., D indicates a depth of the working gap, L* indicates an effective length of an oblique part for forming the working gap, and min [a, b] indicates the smaller of a and b.

摘要翻译： 公开了一种磁头，其具有通过面对磁记录介质的磁头部分处的工作间隙面对一对磁性物质形成的磁芯，其中至少一个磁性物质具有磁各向异性，并且角度α（在 C形芯部一半）和/或与磁记录介质相对的芯面之间的角度α'（I形磁芯半部）和磁性物质的主磁路平面中具有最大导磁率的方向 使磁各向异性大于上述方向的取向角，以使磁芯的主磁路的磁阻为β（对于α）和/或β'（对于α'）来改善记录/再现的磁阻 磁头的特性，其中β由公式给出等于或小于25°，D表示工作间隙的深度，L *表示斜度的有效长度 t形成工作间隙，min [a，b]表示a和b中较小的一个。