公开(公告)号：US08279739B2

公开(公告)日：2012-10-02

申请号：US13384933

申请日：2010-08-19

Applicant: Tetsuya Kanbe ,  Yuzo Sasaki ,  Atsushi Hashimoto

Inventor： Tetsuya Kanbe ,  Yuzo Sasaki ,  Atsushi Hashimoto

IPC: G11B3/70

CPC classification number: G11B5/7325 ,  G11B5/6088 ,  G11B5/656 ,  G11B5/82 ,  G11B2005/0021

Abstract: A heat-assisted magnetic recording medium that includes a substrate, underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and contains either an FePt alloy having an L10 structure or a CoPt alloy having an L10 structure as a main component, wherein the underlayers include a first underlayer formed from an amorphous alloy, a second underlayer formed from an alloy having a BCC structure containing Cr as a main component and also containing at least one element selected from among Ti, Mo, W, V, Mn and Ru, and a third underlayer formed from MgO. Also, a magnetic storage device that uses the heat-assisted magnetic recording medium.

Abstract translation: 一种热辅助磁记录介质，其包括基板，形成在基板上的底层，和形成在底层上的磁性层，并且含有具有L10结构的FePt合金或具有L10结构的CoPt合金作为主要成分 其特征在于，所述底层包括由非晶合金形成的第一底层，由具有以Cr为主成分的BCC结构的合金形成的第二底层，还含有选自Ti，Mo，W，V，Mn中的至少一种元素 和Ru，以及由MgO形成的第三底层。 而且，使用该热辅助磁记录介质的磁存储装置。

公开(公告)号：US08270286B2

公开(公告)日：2012-09-18

申请号：US13073408

申请日：2011-03-28

Applicant: Tetsuya Kanbe ,  Atsushi Hashimoto ,  Takayuki Fukushima

Inventor： Tetsuya Kanbe ,  Atsushi Hashimoto ,  Takayuki Fukushima

IPC: G11B3/70

CPC classification number: G11B5/7325 ,  G11B5/65

Abstract: Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having an L10 structure, characterized in that at least one of said underlayers is predominantly comprised of MgO and comprises at least one kind of an element having a free energy for oxidation of, per mol of oxygen, not higher than −120 kcal/mol·O2 at 1000° C. The element having the free energy for oxidation is preferably selected from Al, Si, Ti, V, Cr, Mn, Zr and B. The thermally assisted magnetic recording medium has a magnetic layer comprised of magnetic crystal grains with uniform diameters, and exhibiting a sufficiently weak exchange coupling between magnetic grains.

Abstract translation: 公开了一种热辅助磁记录介质，其包括基板，形成在基板上的多个底层，以及形成在底层上并主要由具有L10结构的合金组成的磁性层，其特征在于，所述至少一个所述 底层主要由MgO组成，并且包含至少一种元素，其具有在1000℃下每摩尔氧气不超过-120千卡/摩尔·O 2的自由能。元素具有自由能 氧化优选选自Al，Si，Ti，V，Cr，Mn，Zr和B.热辅助磁记录介质具有由具有均匀直径的磁性晶粒构成的磁性层，并且在磁性颗粒之间呈现足够弱的交换耦合 。

公开(公告)号：US07419730B2

公开(公告)日：2008-09-02

申请号：US10931642

申请日：2004-08-31

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

Inventor： Xiaoping Bian ,  Mary Frances 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：US06887565B2

公开(公告)日：2005-05-03

申请号：US10306361

申请日：2002-11-27

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

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

IPC: G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  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.

公开(公告)号：US06596420B2

公开(公告)日：2003-07-22

申请号：US10101946

申请日：2002-03-21

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: G11B566

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.

公开(公告)号：US06221508B1

公开(公告)日：2001-04-24

申请号：US09206869

申请日：1998-12-08

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: C23C1500

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 magneto-resistance 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.

Abstract translation: 在具有磁记录介质的磁存储装置中，用于以预先指定的记录方向驱动该介质的驱动单元，包括记录器部分和再现部分的磁头组件，用于使磁头相对于磁体相对移动的装置 记录介质和记录/重放信号处理器装置，用于对磁头执行信号输入并用于实现来自磁头的输出信号的再现，所述磁头的再现部分由磁阻的磁头组成 所述磁记录介质被构造成包括基板和形成在其上的一个或多个底层之间形成的磁性层，其中至少一个底层是由其中含有Ni的非晶或微晶材料制成的特定层 作为其主要成分或主要成分，还含有至少一种 选自Nb和Ta的元素。

公开(公告)号：US6080476A

公开(公告)日：2000-06-27

申请号：US048167

申请日：1998-03-25

Applicant: Tetsuya Kanbe ,  Yoshio Takahashi ,  Akira Ishikawa ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Yoshifumi Matsuda ,  Kiwamu Tanahashi ,  Tomoo Yamamoto

Inventor： Tetsuya Kanbe ,  Yoshio Takahashi ,  Akira Ishikawa ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Yoshifumi Matsuda ,  Kiwamu Tanahashi ,  Tomoo Yamamoto

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

CPC classification number: G11B5/65 ,  G11B5/64 ,  G11B5/653 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/26 ,  Y10T428/265

Abstract: It is an object of the present invention to provide a magnetic recording medium which has a magnetic layer deposited on a substrate through a single-layer underlayer or a multilayer-underlayer, the magnetic layer includes magnetic crystal grains having an acicular structure or amorphous magnetic particles, an average grain size of the magnetic grain and a grain-size dispersion normalized by the average grain size are less than 16 nm and less than 0.5, respectively, a value Ku.multidot.v/kT which results from dividing a product of a magnetic anisotropy constant Ku and a volume v of the magnetic grain by a product of a Boltzmann constant k and an absolute temperature T is selected to be greater than 60, and a film thickness of the magnetic layer falls within twice of the average grain size. Thus, there can be realized a magnetic recording system in which a media noise can be reduced, a high S/N and a low bit error rate can be obtained and which has a high recording density of 2 gigabits per one square inches and an MTBF (mean time between failure) of higher than 300000 hours.

Abstract translation: 本发明的目的是提供一种通过单层底层或多层下层沉积在基板上的磁性层的磁记录介质，该磁性层包括具有针状结构的磁性晶粒或非晶磁性颗粒 磁性晶粒的平均晶粒尺寸和平均晶粒尺寸归一化的晶粒尺寸分散度分别小于16nm且小于0.5时，分别由磁各向异性常数Ku的乘积产生的Kuxv / kT值 并且通过玻尔兹曼常数k和绝对温度T的乘积将磁性粒子的体积v选择为大于60，并且磁性层的膜厚度落在平均晶粒尺寸的两倍内。 因此，可以实现可以降低媒体噪声的磁记录系统，可以获得高S / N和低误码率，并且其具有高达2吉比特每平方英寸的高记录密度和MTBF （故障之间的平均时间）高于30万小时。

公开(公告)号：US5470563A

公开(公告)日：1995-11-28

申请号：US442376

申请日：1989-11-28

Applicant: Hiroshi Tanaka ,  Toshiaki Kobayashi ,  Tomiyuki Nanba ,  Masaaki Ishiwatari ,  Toshio Yoneyama ,  Kimio Ohno ,  Takashi Matsumoto ,  Tetsuya Kanbe ,  Takashi Isa ,  Yoshiyuki Ogusu

Inventor： Hiroshi Tanaka ,  Toshiaki Kobayashi ,  Tomiyuki Nanba ,  Masaaki Ishiwatari ,  Toshio Yoneyama ,  Kimio Ohno ,  Takashi Matsumoto ,  Tetsuya Kanbe ,  Takashi Isa ,  Yoshiyuki Ogusu

IPC: A61K8/894 ,  A61K8/898 ,  A61Q1/10 ,  A61Q5/08 ,  A61Q9/04 ,  B01F17/54 ,  C08L83/12 ,  A61K7/032 ,  A61K7/135 ,  A61K7/155 ,  A61K9/70 ,  A61K47/34 ,  A61L15/26 ,  A61L15/58 ,  C08J11/08

CPC classification number: A61K8/894 ,  A61Q1/10 ,  A61Q5/08 ,  A61Q9/04 ,  B01F17/0071 ,  C08L83/12 ,  A61K2800/75 ,  Y10S424/03

Abstract: A skin irritation alleviation agent composed of a polyoxyalkylene-modified organopolysiloxane is provided. Various compositions including skin external application compositions, cosmetic or similar compositions (e.g., an adhesive composition for a false eyelash, a decolorant composition, a depilatory composition, and an eyeliner composition) containing a polyoxyalkylene-modified organosiloxane are also provided. This alleviation agent has a low skin irritation effect and extremely high safety factor when used on the human body.

Abstract translation: 提供由聚氧化烯改性的有机聚硅氧烷组成的皮肤刺激缓解剂。 还提供了包含皮肤外用组合物，化妆品或类似组合物（例如，用于假睫毛的粘合剂组合物，脱色剂组合物，脱毛组合物和眼线组合物）的各种组合物，其含有聚氧化烯改性的有机基硅氧烷。 这种减轻剂在人体使用时具有低的皮肤刺激作用和极高的安全系数。

公开(公告)号：US09818441B2

公开(公告)日：2017-11-14

申请号：US13577085

申请日：2011-02-03

Applicant: Tetsuya Kanbe ,  Atsushi Hashimoto ,  Takayuki Fukushima

Inventor： Tetsuya Kanbe ,  Atsushi Hashimoto ,  Takayuki Fukushima

IPC: G11B5/73 ,  G11B5/65 ,  G11B5/31 ,  G11B5/00

CPC classification number: G11B5/7325 ,  G11B5/314 ,  G11B5/65 ,  G11B2005/0005 ,  G11B2005/0021

Abstract: Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having a L10 structure, characterized in that at least one of the underlayers is predominantly comprised of MgO and comprises at least one oxide selected from SiO2, TiO2, Cr2O3, Al2O3, Ta2O5, ZrO2, Y2O3, CeO2, MnO, TiO and ZnO. The thermally assisted magnetic recording medium has a magnetic layer comprised of fine magnetic crystal grains, exhibiting a sufficiently weak exchange coupling between magnetic grains, and having a minimized coercive force dispersion.

公开(公告)号：US08351309B2

公开(公告)日：2013-01-08

申请号：US13033010

申请日：2011-02-23

Applicant: Tetsuya Kanbe ,  Atsushi Hashimoto ,  Takayuki Fukushima

Inventor： Tetsuya Kanbe ,  Atsushi Hashimoto ,  Takayuki Fukushima

IPC: G11B7/085

CPC classification number: G11B5/65 ,  G11B5/7325 ,  G11B2005/0021

Abstract: Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having a L10 structure, characterized in that at least one of the underlayers is predominantly comprised of MgO and comprises at least one kind of a metal element having a melting point of at least 2,000° C., such as Nb, Mo, Ru, Ta or W. The thermally assisted magnetic recording medium has magnetic crystal grains having uniform size in the magnetic layer, and has a narrow switching field distribution (SFD), and a magnetic recording storage provided with the thermally assisted magnetic recording medium exhibits a high SN ratio.

Abstract translation: 公开了一种热辅助磁记录介质，其包括基板，形成在基板上的多个底层，以及形成在底层上的主要由具有L10结构的合金组成的磁性层，其特征在于，至少一个 底层主要由MgO组成，并且包括至少一种熔点至少为2000℃的金属元素，例如Nb，Mo，Ru，Ta或W.该热辅助磁记录介质具有磁性晶粒 在磁性层中具有均匀的尺寸，并且具有窄的开关场分布（SFD），并且设置有热辅助磁记录介质的磁记录存储体呈现高SN比。