公开(公告)号：US6001447A

公开(公告)日：1999-12-14

申请号：US4318

申请日：1998-01-08

Applicant: Kiwamu Tanahashi ,  Yuzuru Hosoe ,  Ichiro Tamai ,  Tetsuya Kanbe ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Yoshio Takahashi

Inventor： Kiwamu Tanahashi ,  Yuzuru Hosoe ,  Ichiro Tamai ,  Tetsuya Kanbe ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Yoshio Takahashi

IPC: G11B5/66 ,  G11B5/39 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73 ,  G11B5/738 ,  H01F10/16

CPC classification number: G11B5/7325 ,  G11B5/64 ,  Y10S428/90 ,  Y10T428/265

Abstract: The magnetic storage apparatus has a high reliability at a recording density of 2 gigabits or more per square inch. The longitudinal recording media necessary to realize the apparatus has a low media noise and is immune from the influence of thermal fluctuations. The magnetic storage apparatus has a longitudinal magnetic recording media including a magnetic layer which is formed on a substrate via a multi-layered underlayer; a driver for driving the recording media in a recording direction; a magnetic head including a recording section and a read-back section; a driver for moving the magnetic head relatively with respect to the longitudinal magnetic recording media; and a read/write signal processor for processing input signals to the magnetic head and output signal read-back therefrom. The read-back section of the magnetic head includes a magnetoresistive head. One layer of the multi-layered underlayer in the longitudinal magnetic recording media which is in contact with the magnetic layer has a substantially hexagonal close-packed (hcp) structure and has crystal grains whose c-axes are substantially parallel with the substrate plane.

Abstract translation: 磁记录装置在每平方英寸2吉比特或更高的记录密度下具有高可靠性。 实现该装置所需的纵向记录介质具有低介质噪声并且免受热波动的影响。 磁存储装置具有纵向磁记录介质，其包括通过多层底层形成在基板上的磁性层; 用于在记录方向上驱动记录介质的驱动器; 包括记录部分和回读部分的磁头; 用于相对于纵向磁记录介质移动磁头的驱动器; 以及用于处理对磁头的输入信号和从其读回的输出信号的读/写信号处理器。 磁头的回读部分包括磁阻头。 与磁性层接触的纵向磁记录介质中的多层底层的一层具有大致六边形密堆积（hcp）结构，并且具有c轴与基板平面基本平行的晶粒。

公开(公告)号：US07338725B2

公开(公告)日：2008-03-04

申请号：US11072042

申请日：2005-03-03

Applicant: Tetsuya Kanbe ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

Inventor： Tetsuya Kanbe ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

IPC: G11B5/66 ,  G11B5/70

CPC classification number: G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/265

Abstract: An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.

Abstract translation: 描述了具有高S / N和热稳定性的内置磁记录介质和具有50兆比特/平方毫米或更高的表面记录密度的可靠的磁存储装置。 磁记录介质包括形成在非磁性基底上的磁性层，其间具有多个接地层，至少一个接地层由以Cr为主要成分的体心立方结构的合金形成，B为2原子 ％至12原子％。 磁性层的主要成分包括含有10原子％〜16原子％的Co和Cr的下部磁性层，膜厚为1.5nm〜4.5nm，上部磁性层为Co，与铁素体 通过非磁性中间层降低磁性层。

公开(公告)号：US07163756B2

公开(公告)日：2007-01-16

申请号：US10733928

申请日：2003-12-10

Applicant: Tomoo Yamamoto ,  Yotsuo Yahisa ,  Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Tetsuya Kanbe ,  Hiroyuki Suzuki

Inventor： Tomoo Yamamoto ,  Yotsuo Yahisa ,  Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Tetsuya Kanbe ,  Hiroyuki Suzuki

IPC: G11B5/66

CPC classification number: G11B5/732 ,  G11B5/66 ,  G11B5/7325

Abstract: A large-capacity, low-cost, longitudinal magnetic recording medium capable of ultra-high-density recording of 70 Gigabits or more per square inch is disclosed. The longitudinal magnetic recording medium of the present invention comprises a first seed layer, a second seed layer, a first underlayer, a second underlayer, and a magnetic layer, which are formed on a nonmagnetic substrate in this order. A material containing at least Al and any one of Ru and Re is used to form the second seed layer, and a material containing at least any one of Co and Ni and one or both of Al and Ti is used to form the first underlayer. It is also possible to use Cr or a Cr alloy containing Cr and at least one element selected from the constituent element group A consisting of Ti, Mo, and W for forming the second seed layer.

Abstract translation: 公开了能够以每平方英寸70吉比特或更多的超高密度记录的大容量，低成本的纵向磁记录介质。 本发明的纵向磁记录介质包括依次形成在非磁性基板上的第一种子层，第二籽晶层，第一底层，第二底层和磁性层。 使用至少包含Al和Ru和Re中的任何一种的材料来形成第二种子层，并且使用包含Co和Ni中的至少一种以及Al和Ti中的一种或两种的材料来形成第一底层。 也可以使用含有Cr的Cr或Cr合金和选自由Ti，Mo和W构成的构成元素组A中的至少一种元素来形成第二种子层。

公开(公告)号：US07050253B2

公开(公告)日：2006-05-23

申请号：US10404071

申请日：2003-04-02

Applicant: Tetsuya Kanbe ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshio Takahashi ,  Fumiyoshi Kirino ,  Nagatugu Koiso ,  Satoshi Matsunuma

Inventor： Tetsuya Kanbe ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshio Takahashi ,  Fumiyoshi Kirino ,  Nagatugu Koiso ,  Satoshi Matsunuma

IPC: G11B5/02

CPC classification number: G11B5/7325 ,  C23C14/185 ,  G11B5/00 ,  G11B5/012 ,  G11B2005/001 ,  G11B2005/0016 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/1107 ,  Y10T428/1121 ,  Y10T428/12507 ,  Y10T428/1266 ,  Y10T428/12667 ,  Y10T428/12674 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/12868 ,  Y10T428/12944 ,  Y10T428/265

Abstract: In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section and reproduction section, means for causing the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor means for performing signal inputting to the magnetic head and for effecting reproduction of an output signal from the magnetic head, the reproduction section of said magnetic head is composed of a magnetic head of the magnetoresistance effect type, while said magnetic record medium is structured including a substrate and a magnetic layer formed thereover with one or several underlayers being sandwiched therebetween, wherein at least one of the underlayers is a specific layer that is made of amorphous or microcrystalline materials containing therein Ni as the principal or main component thereof and further containing at least one kind of element as selected from the group consisting of Nb and Ta.

公开(公告)号：US20060046102A1

公开(公告)日：2006-03-02

申请号：US10931642

申请日：2004-08-31

Applicant: Xiaoping Bian ,  Mary Doerner ,  Tetsuya Kanbe ,  Mark Mercado ,  Mohammad Mirzamaani ,  Adam Polcyn ,  Kai Tang

Inventor： Xiaoping Bian ,  Mary Doerner ,  Tetsuya Kanbe ,  Mark Mercado ,  Mohammad Mirzamaani ,  Adam Polcyn ,  Kai Tang

IPC: G11B5/66

CPC classification number: G11B5/732 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325

Abstract: An antiferromagnetically coupled (AFC) magnetic recording medium with an AFC master layer comprising at least two magnetic layers with the top magnetic layer including copper is described. The slave layer is separated from the master layer structure by a nonmagnetic spacer layer selected to antiferromagnetically couple the layers. The master layer structure according to the invention includes a bottom and top layer of distinct ferromagnetic materials. Preferably, the top layer of the master layer is a cobalt alloy including from 1 to 5 at. % copper with an example being CoPt13Cr20B8Cu2. The AFC magnetic layer structure can be used with a variety of substrates including circumferentially textured glass and NiP/AlMg.

Abstract translation: 描述了具有包括至少两个具有顶部磁性层包括铜的磁性层的AFC主层的反铁磁耦合（AFC）磁记录介质。 通过选择用于反铁磁耦合层的非磁性间隔层将从属层与主层结构分离。 根据本发明的主层结构包括不同铁磁材料的底层和顶层。 优选地，主层的顶层是包括1至5个的钴合金。 ％铜，例如CoPt 13 C 20 20 B 2 Cu 2。 AFC磁性层结构可以与各种基材一起使用，包括圆周纹理玻璃和NiP / AlMg。

公开(公告)号：US20050084716A1

公开(公告)日：2005-04-21

申请号：US10985045

申请日：2004-11-10

Applicant: Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

Inventor： Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

IPC: C22C19/07 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  H01F10/16 ,  H01F10/30 ,  G11B5/147

CPC classification number: G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/12861

Abstract: It is an object of the present invention to provide a high reliability magnetic storage apparatus capable of performing writing and reading back of high density information. The magnetic storage apparatus is so configured as to have a longitudinal magnetic recording medium including: a magnetic layer formed on a non-magnetic substrate via a plurality of underlayers; the magnetic layer including a lower magnetic layer containing Ru in an amount of not less than 3 at % to not more than 30 at %, and Cr in an amount of not less than 0 at % to not more than 18 at %, and further containing at least one of B or C in an amount of not less than 0 at % to not more than 20 at %, and an upper magnetic layer containing Co as a main component disposed thereon via a non-magnetic intermediate layer.

Abstract translation: 本发明的目的是提供一种能够执行高密度信息的写入和读回的高可靠性磁存储装置。 磁存储装置被配置为具有纵向磁记录介质，其包括：通过多个底层在非磁性基板上形成的磁性层; 所述磁性层包括含有不小于3原子％至不超过30原子％的量的Ru的下磁性层，并且不少于0原子％至不大于18原子％的Cr， 含有不小于0at％至不超过20at％的B或C中的至少一个，以及经由非磁性中间层设置在其上的Co作为主要成分的上磁性层。

公开(公告)号：US06403240B1

公开(公告)日：2002-06-11

申请号：US08849414

申请日：1997-05-19

Applicant: Tetsuya Kanbe ,  Akira Ishikawa ,  Ichiro Tamai ,  Yotsuo Yahisa ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshibumi Matsuda ,  Hiroyuki Kataoka ,  Toshinori Ono ,  Shinji Fukaya ,  Kazuhiro Ura ,  Naoto Endo ,  Tomoo Yamamoto

Inventor： Tetsuya Kanbe ,  Akira Ishikawa ,  Ichiro Tamai ,  Yotsuo Yahisa ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshibumi Matsuda ,  Hiroyuki Kataoka ,  Toshinori Ono ,  Shinji Fukaya ,  Kazuhiro Ura ,  Naoto Endo ,  Tomoo Yamamoto

IPC: B32B1504

CPC classification number: G11B5/7325 ,  G11B5/012 ,  G11B5/39 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/26

Abstract: A magnetic recording system includes an in-plane magnetic recording medium having a magnetic layer fabricated on a single underlayer or on a plurality of underlayers respectively fabricated on a substrate; a driver unit for driving the in-plane magnetic recording medium in a write direction; a magnetic head having a read unit and a write unit; a unit for moving the magnetic head relative to the in-plane magnetic recording medium; and a read/write signal processing unit for reading an output signal from the magnetic head and writing an input signal to the magnetic recording media, wherein the read unit of the magnetic head is a magnetoresistive head and the single underlayer or at least one of the plurality of underlayers is made of Co-containing amorphous material or fine crystal material, or is made of alloy material, the alloy material having as the main components at least one element selected from a group consisting of Cr, Mo, V and Ta and containing at least one element selected from a group consisting of B, C, P and Bi. The magnetic recording system can be realized which can read and write high density information and have high reliability.