公开(公告)号：US20040013910A1

公开(公告)日：2004-01-22

申请号：US10444107

申请日：2003-05-22

Applicant: Fujitsu Limited

Inventor： B. Ramamurthy Acharya ,  E. Noel Abarra

IPC: G11B005/66

CPC classification number: G11B5/656 ,  G11B5/00 ,  G11B5/012 ,  G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B2005/0002 ,  G11B2005/0005 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12868 ,  Y10T428/12931

Abstract: A magnetic recording medium includes a nonmagnetic underlayer, an initial magnetic layer, a nonmagnetic spacer layer provided on the initial magnetic layer, and a final magnetic layer provided on the nonmagnetic spacer layer. The initial magnetic layer is disposed closer to the nonmagnetic underlayer than the final magnetic layer, and the initial and final magnetic layers are made of mutually different compositions and are anti-ferromagnetically coupled.

Abstract translation: 磁记录介质包括非磁性底层，初始磁性层，设置在初始磁性层上的非磁性间隔层，以及设置在非磁性间隔层上的最终磁性层。 初始磁性层被设置成比最终的磁性层更靠近非磁性底层，并且初始和最终的磁性层由相互不同的组成制成并且是反铁磁耦合的。

公开(公告)号：US20030219629A1

公开(公告)日：2003-11-27

申请号：US10442940

申请日：2003-05-22

Applicant: FUJI PHOTO FILM CO., LTD.

Inventor： Kenichi Moriwaki ,  Kazuyuki Usui

IPC: G11B005/66

CPC classification number: G11B5/7315 ,  G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  Y10S428/90 ,  Y10T428/12465

Abstract: A magnetic recording medium comprising a flexible support, a first recording layer, an intermediate layer and a second recording layer in this order, wherein the second recording layer comprises a ferromagnetic metal alloy comprising Co, Pt and Cr, and a nonmagnetic oxide.

Abstract translation: 一种磁记录介质，包括柔性支撑件，第一记录层，中间层和第二记录层，其中第二记录层包括由Co，Pt和Cr构成的强磁性金属合金和非磁性氧化物。

公开(公告)号：US20030215675A1

公开(公告)日：2003-11-20

申请号：US10356465

申请日：2003-02-03

Applicant: Hitachi Maxell, Ltd.

Inventor： Nobuyuki Inaba ,  Tetsunori Kouda ,  Hideaki Yamanaka ,  Satoshi Matsunuma ,  Enji Fujita

IPC: G11B005/66

CPC classification number: G11B5/667 ,  G11B5/65 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854

Abstract: A magnetic recording medium comprises a magnetic recording layer 63 which is formed by using an ordered alloy containing B on a substrate 1 containing an amorphous component. A part of B in the ordered alloy is segregated in a grain boundary, and thus the magnetic interaction, which acts between magnetic grains, can be reduced. Accordingly, it is possible to form fine and minute magnetic domains in the magnetic recording layer 63, and it is possible to reduce the medium noise as well. The temperature, at which the substrate is heated during the film formation of the magnetic recording layer 63, can be suppressed to be low, because the ordering temperature for the ordered alloy containing B is lower than those of ordered alloys not containing B. Therefore, it is possible to use a substrate made of glass which is suitable for the mass production. The magnetic recording layer 63 is also excellent in thermal stability because of the use of the ordered alloy having high magnetic anisotropy. According to the present invention, it is possible to provide the magnetic recording medium for high density recording which is excellent in thermal stability and which involves low medium noise.

Abstract translation: 磁记录介质包括磁记录层63，磁记录层63通过在含有非晶成分的基板1上使用含有B的有序合金而形成。 有序合金中的B的一部分在晶界中分离，因此可以减小在磁性颗粒之间作用的磁相互作用。 因此，可以在磁记录层63中形成精细和微小的磁畴，并且也可以降低介质噪声。 由于含有B的有序合金的有序温度低于不含B的有序合金的排序温度，所以在磁记录层63的成膜期间加热基板的温度可以被抑制得较低。因此， 可以使用适合于批量生产的玻璃制的基板。 由于使用具有高磁各向异性的有序合金，磁记录层63的热稳定性也优异。 根据本发明，可以提供热稳定性优异且介质噪音低的高密度记录用磁记录介质。

公开(公告)号：US20030162055A1

公开(公告)日：2003-08-28

申请号：US10374641

申请日：2003-02-26

Inventor： Bin Lu ,  Dieter Weller

IPC: B32B003/00

CPC classification number: G11B5/656 ,  C23C14/3464 ,  C23C14/352 ,  G11B5/82 ,  G11B5/851 ,  Y10T428/24777

Abstract: A magnetic recording layer having polycrystalline chemical ordered (COX)3Pt or (COX)3PtY alloys. The additive X comprises Sc, Ti, V, Cr, Mn, Ni, Cu, Zn, Ga, Ge, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Sn, Hf, Ta, W, Re, Os, B, or C, or any combination thereof. The additive Y comprises B, MgO, Al2O3, SiO2, P, CaO, CoO, B2O3, ZnO, NbO, Mo2O3, Co2O3, C, Cr, P, TiO2, Cr2O3, MnO, ZrO2, or BaO. The ratio of (CoX) to Pt is 2.33 to 4.00, plus or minus 5%. The additive Y may range from approximately 0 to 20% of the entire composition. The magnetic layer may be a constituent layer in a hard disc drive magnetic recording medium.

Abstract translation: 具有多晶化学有序（COX）3Pt或（COX）3PtY合金的磁记录层。 添加剂X包括Sc，Ti，V，Cr，Mn，Ni，Cu，Zn，Ga，Ge，Nb，Mo，Ru，Rh，Pd，Ag，Cd，In，Sn，Hf，Ta， Os，B或C，或其任何组合。 添加剂Y包括B，MgO，Al2O3，SiO2，P，CaO，CoO，B2O3，ZnO，NbO，Mo2O3，Co2O3，C，Cr，P，TiO2，Cr2O3，MnO，ZrO2或BaO。 （CoX）与Pt的比例为2.33〜4.00，加或减5％。 添加剂Y可以在整个组合物的约0至20％的范围内。 磁性层可以是硬盘驱动器磁记录介质中的构成层。

公开(公告)号：US20030104253A1

公开(公告)日：2003-06-05

申请号：US10277208

申请日：2002-10-22

Applicant: SHOWA DENKO K.K.

Inventor： Hiroshi Osawa ,  Kenzo Hanawa

IPC: G11B005/82

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

Abstract: A magnetic recording medium having a non-magnetic substrate, a non-magnetic undercoat layer, a plurality of magnetic layers, and a protective film, is disclosed. At least one non-magnetic coupling layer is provided above the non-magnetic undercoat layer, a first magnetic layer is provided beneath the non-magnetic coupling layer and a second magnetic layer is provided atop the non-magnetic coupling layer, and the first magnetic layer is formed of a CoRu-based alloy, a CoRe-based alloy, a CoIr-based alloy, or a CoOs-based alloy.

Abstract translation: 公开了一种具有非磁性基底，非磁性底涂层，多个磁性层和保护膜的磁记录介质。 在非磁性底涂层上方设置至少一个非磁性耦合层，第一磁性层设置在非磁性耦合层的下方，第二磁性层设置在非磁性耦合层的顶部，第一磁性层 层由CoRu基合金，CoRe基合金，CoIr基合金或CoO基合金形成。

公开(公告)号：US20030082407A1

公开(公告)日：2003-05-01

申请号：US10228952

申请日：2002-08-28

Applicant: SHOWA DENKO K.K.

Inventor： Akira Sakawaki ,  Kenji Shimizu ,  Hiro Mochizuki ,  Masato Kokubu ,  Hui Yang ,  Masakazu Kobayashi ,  Hiroshi Sakai

IPC: G11B005/72

CPC classification number: G11B5/656 ,  G11B5/66 ,  G11B5/851 ,  Y10S428/90

Abstract: A magnetic recording medium having a non-magnetic substrate; an orientation-regulating layer for regulating the crystal orientation of a layer provided directly thereon; a perpendicular magnetic layer in which easy-magnetization axes are oriented generally perpendicular to the substrate; and a protective layer is disclosed. The perpendicular magnetic layer is formed from a material containing Co as a primary component and at least Cr, Pt, and Nd. A process to produce the magnetic recording medium and a magnetic recording and reproducing apparatus are also disclosed.

Abstract translation: 一种具有非磁性基片的磁记录介质; 用于调节直接设置在其上的层的晶体取向的取向调节层; 易磁化轴大致垂直于基板定向的垂直磁性层; 并且公开了保护层。 垂直磁性层由含有Co作为主要成分并且至少包含Cr，Pt和Nd的材料形成。 还公开了制造磁记录介质的过程和磁记录和再现装置。

公开(公告)号：US06541131B1

公开(公告)日：2003-04-01

申请号：US09845167

申请日：2001-05-01

Applicant: Roger A. Ristau

Inventor： Roger A. Ristau

IPC: G11B566

CPC classification number: G11B5/656 ,  C23C14/3464 ,  G11B5/84 ,  Y10S428/90

Abstract: A perpendicular magnetic recording medium having a substrate and an annealed magnetic layer comprising boron on the substrate, the magnetic layer being a single film and having an L10 structure, and a process for manufacturing the perpendicular magnetic recording medium are disclosed.

Abstract translation: 公开了一种垂直磁记录介质，其具有基板和在基板上包含硼的退火磁性层，磁性层为单一膜并具有L10结构，以及制造垂直磁记录介质的方法。

公开(公告)号：US20030059651A1

公开(公告)日：2003-03-27

申请号：US10242446

申请日：2002-09-13

Applicant: SHOWA DENKO K.K. and TOSHIBA CORPORATION

Inventor： Kenji Shimizu ,  Akira Sakawaki ,  Hui Yang ,  Hiro Mochizuki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Soichi Oikawa

IPC: G11B005/66

CPC classification number: G11B5/667 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/12944 ,  Y10T428/265

Abstract: A magnetic recording medium having excellent magnetic read/write characteristics and thermal stability characteristics, and a method of manufacturing therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium comprises an orientation control film 3 that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film 5, of which the axis of easy magnetization is generally oriented perpendicular to a substrate, and a protective film 6, that are provided on a non-magnetic substrate 1, wherein the orientation control film 3 is made of a non-magnetic material which contains 33 to 80 at % of Ni and one or more kinds of elements selected from Sc, Y, Ti, Zr, Hf, Nb and Ta.

Abstract translation: 提供具有优异的磁读/写特性和热稳定性特性的磁记录介质及其制造方法和磁读/写装置。 这种磁记录介质包括控制直接在其上设置的膜的取向的取向控制膜3，容易磁化轴线垂直于基板的垂直磁性膜5和保护膜6， 设置在非磁性基板1上，其中取向控制膜3由非磁性材料制成，该非磁性材料包含33至80原子％的Ni和选自Sc，Y，Ti，Zr，Hf中的一种或多种元素 ，Nb和Ta。

公开(公告)号：US06534205B2

公开(公告)日：2003-03-18

申请号：US09409553

申请日：1999-09-30

Applicant: Hisateru Sato ,  Isatake Kaitsu ,  Iwao Okamoto

Inventor： Hisateru Sato ,  Isatake Kaitsu ,  Iwao Okamoto

IPC: G11B566

CPC classification number: G11B5/7325 ,  G11B5/65 ,  G11B5/656 ,  Y10S428/90 ,  Y10T428/12854

Abstract: There is provided a magnetic storage medium capable of recording information at high recording density and also to regenerating the information with a high quality of signal (high S/Nm), and in addition contributing to the elongation of a life span of the recorded information. The magnetic storage medium comprises a non-magnetic substrate and a magnetic recording layer provided on the substrate. The magnetic recording layer has a ferromagnetic grain consisting of a ferromagnetic material and an antiferromagnetic matrix consisting of an antiferromagnetic material.

Abstract translation: 提供了能够以高记录密度记录信息并且还以高质量信号（高S / Nm）再生信息的磁存储介质，并且还有助于延长记录信息的使用寿命。 磁存储介质包括非磁性衬底和设置在衬底上的磁记录层。 磁记录层具有由铁磁材料和由反铁磁材料构成的反铁磁矩阵组成的铁磁性晶粒。

公开(公告)号：US20030044647A1

公开(公告)日：2003-03-06

申请号：US09947287

申请日：2001-09-05

Inventor： Iraj Kavosh ,  James Shuster ,  Andrew Ching Tam

IPC: B32B027/14

CPC classification number: G11B5/8408 ,  B23K26/06 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/244 ,  G11B5/656 ,  G11B5/731 ,  G11B5/7379 ,  G11B5/82 ,  G11B5/851

Abstract: A magnetic disk is provided which comprises a nonmetallic glass or glass ceramic substrate having one or more under layers, a magnetic layer applied over the under layers, and a hard carbon layer applied over the magnetic layer. A plurality of bumps are formed on the magnetic disk by applying a beam from a near infrared wavelength laser to the surface of the carbon layer.

Abstract translation: 提供一种磁盘，其包括具有一个或多个下层的非金属玻璃或玻璃陶瓷基板，施加在下层上的磁性层和施加在该磁性层上的硬碳层。 通过将来自近红外波长激光的光束施加到碳层的表面，在磁盘上形成多个凸块。