公开(公告)号：US20040253486A1

公开(公告)日：2004-12-16

申请号：US10856209

申请日：2004-05-27

Inventor： Charles Changqing Chen ,  Thanh Thien Ha ,  Abebe Hailu ,  Taesun Ernest Kim ,  Mariana Rodica Munteanu ,  Steve Kuo-Hsing Hwang

IPC: B32B003/02

CPC classification number: G11B5/7325 ,  G11B5/656 ,  G11B5/66 ,  G11B5/851

Abstract: CoCrPtB is a conventional material used in some of the layers of a thin film magnetic media structure used for recording data in data storage devices such as hard drives. Typically the CoCrPtB layers used for magnetic media have high Cr and low B in bottom magnetic layers and low Cr and high B in top magnetic layers. In accordance with one embodiment of this invention and to improve media electrical performance, fifth elements, such as Ta, Nb and Hf, etc. were added to the CoCrPtB materials, resulting in CoCrPtBnullX, to enhance the grain segregation. The five element CoCrPtBnullX layers were deposited using a pulsed direct current sputter technique instead of conventional direct current sputtering techniques. The resulting magnetic media structure having CoCrPtBnullX alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.

Abstract translation: CoCrPtB是用于在诸如硬盘驱动器的数据存储设备中记录数据的薄膜磁性介质结构的一些层中的常规材料。 通常用于磁性介质的CoCrPtB层在底部磁性层中具有高Cr和低B，在顶部磁性层中具有低Cr和高B。 根据本发明的一个实施例，为了改善介质电性能，向CoCrPtB材料中添加了诸如Ta，Nb和Hf等第五元素，产生CoCrPtB-X，以增强晶粒分离。 使用脉冲直流溅射技术代替传统的直流溅射技术沉积五个元素CoCrPtB-X层。 所得到的具有CoCrPtB-X合金层的磁性介质结构表现出矫顽力Hc的提高和记录性能的提高。

公开(公告)号：US20040252411A1

公开(公告)日：2004-12-16

申请号：US10838832

申请日：2004-05-04

Applicant: FUJITSU LIMITED

Inventor： Akiko Handa ,  Kazuhisa Shida ,  Noriyuki Asakura ,  Akira Kikuchi

IPC: G11B023/00

CPC classification number: G11B5/7325 ,  G11B5/656

Abstract: A magnetic recording medium and a magnetic recording medium driving apparatus are disclosed. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium, and the magnetic recording medium driving apparatus, realize a high S/Nm and thermal stability.

Abstract translation: 公开了磁记录介质和磁记录介质驱动装置。 通过提供由饱和磁通密度控制在预定范围内的CoCr合金制成的多个中间层，磁记录介质和磁记录介质驱动装置实现高S / Nm和热稳定性。

公开(公告)号：US20040191466A1

公开(公告)日：2004-09-30

申请号：US10801563

申请日：2004-03-17

Applicant: KABUSHIKI KAISHA TOSHIBA ,  SHOWA DENKO K.K.

Inventor： Takeshi Iwasaki ,  Takashi Hikosaka ,  Soichi Oikawa ,  Futoshi Nakamura ,  Tomoyuki Maeda ,  Hiroshi Sakai ,  Kenji Shimizu ,  Akira Sakawaki

IPC: B32B001/00

CPC classification number: G11B5/7325 ,  G11B5/656

Abstract: Disclosed is a perpendicular magnetic recording medium in which an undercoating layer having crystal grains and a grain boundary material containing a carbide or boride is formed below a perpendicular magnetic recording layer, and another undercoating layer containing one of elements forming the crystal grains is formed below the aforementioned undercoating layer, and which can perform highnulldensity recording by further decreasing the grain size of the perpendicular magnetic recording layer.

Abstract translation: 公开了一种垂直磁记录介质，其中具有晶粒的底涂层和含有碳化物或硼化物的晶界物质形成在垂直磁记录层的下方，并且在其下方形成另一个含有形成晶粒的元素的底涂层 通过进一步降低垂直磁记录层的晶粒尺寸，可以进行高密度记录。

公开(公告)号：US06773764B2

公开(公告)日：2004-08-10

申请号：US10033903

申请日：2002-01-03

Applicant: Ernesto E. Marinero ,  Hemantha K. Wickramasinghe

Inventor： Ernesto E. Marinero ,  Hemantha K. Wickramasinghe

IPC: B05D306

CPC classification number: G11B5/127 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/74 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B9/14 ,  G11B9/1409 ,  G11B9/1472 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

Abstract: A method for patterning a recording medium selectively thermally couples a recording medium and a heat source to alter a chemical composition of the recording medium. An apparatus for patterning a recording medium has a heat source for generating and directing an incident thermal wave to a recording medium so as to alter a chemical composition of the recording medium, and a controller for coordinating a mutual position of the incident thermal wave and the recording medium for inducing a direct thermal coupling between the recording medium and the heat source.

Abstract translation: 图案化记录介质的方法选择性地热连接记录介质和热源以改变记录介质的化学成分。 用于图案化记录介质的装置具有用于产生并引导入射热波到记录介质以便改变记录介质的化学成分的热源，以及用于协调入射热波的相互位置和 用于引起记录介质和热源之间的直接热耦合的记录介质。

公开(公告)号：US20040146747A1

公开(公告)日：2004-07-29

申请号：US10616377

申请日：2003-07-10

Applicant: Hitachi, Ltd.

Inventor： Hiroaki Nemoto ,  Ikuko Takekuma ,  Yuzuru Hosoe ,  Hiroyuki Nakagawa ,  Masukazu Igarashi

IPC: B32B003/00

CPC classification number: G11B5/66 ,  G11B5/656 ,  G11B5/7379

Abstract: Co/Pd or Co/Pt superlattice is provided to enable magnetic recording devices to sustain good recording/readback performances across a wide range of temperatures. Such a superlattice medium includes a substrate and a magnetic layer formed on the substrate and the magnetic layer comprises multilayer superlattice films of ferromagnetic metal layers which contain Co and paramagnetic metal layers which consist of Pd and/or Pt, wherein the ferromagnetic metal layers further contain a paramagnetic element and the thickness of the paramagnetic metal layers is 0.8 nm or less. When a magnetic torque loop of the perpendicular magnetic recording medium is measured with a torque magnetometer, the polarity of a value of loop components with translational symmetry of 90 degrees should be opposite to the polarity of a value of loop components with translational symmetry of 180 degrees. Perpendicular magnetic recording media of high performance are achieved in which high recording/readback signal quality is achieved and change in superlattice magnetic properties with extreme temperature change is suppressed.

Abstract translation: 提供Co / Pd或Co / Pt超晶格以使得磁记录装置能够在宽的温度范围内保持良好的记录/回读性能。 这种超晶格介质包括基板和形成在基板上的磁性层，磁性层包括含有由Pd和/或Pt组成的Co和顺磁性金属层的强磁性金属层的多层超晶格膜，其中铁磁金属层进一步包含 顺磁元件和顺磁性金属层的厚度为0.8nm以下。 当使用扭矩磁力计测量垂直磁记录介质的磁力矩回路时，90度的平移对称度的环路分量的极性应与180度的平移对称性的环路分量的极性相反 。 实现了高记录/回读信号质量的高性能的垂直磁记录介质，并且抑制了极端温度变化的超晶格磁特性的变化。

公开(公告)号：US06753077B2

公开(公告)日：2004-06-22

申请号：US09741890

申请日：2000-12-22

Applicant: Kenichi Nakata ,  Kousaku Tamari ,  Jun Koujima ,  Teruaki Santoki

Inventor： Kenichi Nakata ,  Kousaku Tamari ,  Jun Koujima ,  Teruaki Santoki

IPC: G11B562

CPC classification number: G11B5/653 ,  G11B5/64 ,  G11B5/656 ,  G11B5/84 ,  G11B5/851 ,  Y10T428/265

Abstract: A magnetic recording medium including a substrate and formed on the substrate a maghemite thin film having a surface roughness represented by a center line mean roughness Ra of 0.1 to 1.0 nm, and a coercive force squareness S* value of not less than 0.50. This magnetic recording medium exhibits excellent magnetic properties, especially, coercive force squareness S* value and a more enhanced surface smoothness.

Abstract translation: 一种包括基板的磁记录介质，在基板上形成具有中心线平均粗糙度Ra为0.1〜1.0nm，矫顽力矩S *值为0.50以上的表面粗糙度的磁赤铁矿薄膜。 该磁记录介质表现出优异的磁特性，特别是矫顽力矩S *值和更强的表面平滑度。

公开(公告)号：US20040110034A1

公开(公告)日：2004-06-10

申请号：US10647094

申请日：2003-08-22

Applicant: Fuji Electric Co., Ltd.

Inventor： Yasuyuki Kawada

IPC: G11B005/66

CPC classification number: G11B5/732 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/8404 ,  G11B5/851

Abstract: A perpendicular magnetic recording medium has high recording density and excellent read-write characteristics. The recording medium has a magnetic layer of a multilayered lamination structure composed of laminated cobalt layers mainly containing cobalt and noble metal layers of platinum or palladium. At least one of the cobalt layers and the noble metal layers contains at least one element selected from the group consisting of Ru, Ta, Nb, Mo, Mn, Cr, Si, and Ni, or an oxide, in a concentration ranging from 1 to 15 mol %. The magnetic layer is formed on an underlayer of ruthenium or the like for reducing magnetic interaction between the magnetic particles in the magnetic layer. The surface of the underlayer is treated for oxygen adsorption before depositing the magnetic layer to suppress magnetic interaction between the magnetic particles in the magnetic layer.

Abstract translation: 垂直磁记录介质具有高记录密度和优良的读写特性。 记录介质具有由主要包含钴和铂或钯的贵金属层的层叠钴层构成的多层叠层结构的磁性层。 钴层和贵金属层中的至少一层含有选自Ru，Ta，Nb，Mo，Mn，Cr，Si和Ni中的至少一种元素，或氧化物，浓度范围为1 至15摩尔％。 磁性层形成在钌等的底层上，用于减小磁性层中的磁性颗粒之间的磁相互作用。 在沉积磁性层之前，对底层的表面进行氧吸附处理以抑制磁性层中的磁性颗粒之间的磁相互作用。

公开(公告)号：US20040106010A1

公开(公告)日：2004-06-03

申请号：US10701488

申请日：2003-11-06

Applicant: KABUSHIKI KAISHA TOSHIBA ,  SHOWA DENKO K,K,

Inventor： Takeshi Iwasaki ,  Takashi Hikosaka ,  Soichi Oikawa ,  Futoshi Nakamura ,  Hiroshi Sakai ,  Kenji Shimizu ,  Akira Sakawaki

IPC: A41G009/00

CPC classification number: G11B5/7325 ,  G11B5/656 ,  G11B5/84

Abstract: Disclosed is a perpendicular magnetic recording medium comprising a perpendicular magnetic layer formed at 280 to 450null C. by using a magnetic layer-forming material containing at least one additive component selected from the group consisting of cobalt, platinum, chromium, molybdenum and tungsten, the magnetic perpendicular layer being constructed to include a plurality of magnetic crystal grains separated from each other by crystal grain boundaries and providing the perpendicular magnetic layer in which the additive component is segregated in the crystal grain boundaries.

Abstract translation: 公开了一种垂直磁记录介质，其包括通过使用含有选自钴，铂，铬，钼和钨中的至少一种添加剂成分的磁性层形成材料在280至450℃形成的垂直磁性层， 磁性垂直层被构造为包括通过晶粒边界彼此分离的多个磁性晶粒，并且提供其中添加成分在晶粒边界中分离的垂直磁性层。

公开(公告)号：US20040072028A1

公开(公告)日：2004-04-15

申请号：US10377019

申请日：2003-02-28

Inventor： Michio Ohsawa ,  Akihiro Otsuki

IPC: G11B005/66

CPC classification number: G11B5/7325 ,  G11B5/656 ,  G11B5/851 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12868 ,  Y10T428/12931 ,  Y10T428/12986 ,  Y10T428/265

Abstract: A magnetic recording medium can be produced without substrate heating during sputtering. The recording medium has a substrate, an underlayer of a nonmagnetic film with a bcc structure formed on the substrate, an intermediated layer of a nonmagnetic film with an hcp structure formed on the underlayer, a magnetic layer of a magnetic film with an hcp structure formed on the intermediate layer, and a protective layer formed on the magnetic layer. Materials used for the underlayer, the intermediate layer, and the magnetic layer has spacings between principal lattice planes of the respective crystals that can be expresses as d1 (between (110) planes in the underlayer)>d2 (between (002) planes in the intermediate layer)>d3 (between (002) planes in the magnetic layer).

Abstract translation: 可以在溅射期间不进行基板加热来制造磁记录介质。 记录介质具有基板，在基板上形成有bcc结构的非磁性膜的底层，在底层上形成具有hcp结构的非磁性膜的中间层，形成hcp结构的磁性膜的磁性层 在中间层上形成保护层。 用于底层，中间层和磁性层的材料在相应晶体的主晶格面之间具有间隔，其可以表示为d1（在底层中的（110）面之间）> d2（在（002）面之间 中间层）> d3（在磁性层中的（002）面之间）。

公开(公告)号：US20040038083A1

公开(公告)日：2004-02-26

申请号：US10372335

申请日：2003-02-25

Applicant: Hitachi, Ltd.

Inventor： Yoshiyuki Hirayama ,  Hiroyuki Nakagawa ,  Hiroaki Nemoto ,  Ichiro Tamai ,  Ikuko Takekuma

IPC: B32B003/00

CPC classification number: B82Y10/00 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/743 ,  Y10T428/24802

Abstract: A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.

Abstract translation: 垂直磁记录介质包括由软磁膜和垂直磁化膜之间的多层形成的中间膜。 中间膜包括至少两层，即含氧层或含有氮，硅或碳的非金属元素层，以及在含氧层或非金属元素的表面侧上形成的金属层 包含层。 金属层包括多个孤立的岛状结构。 垂直磁化膜的晶粒形成为对应于孤立的岛状结构。 结果，获得高记录密度。