公开(公告)号：US20050277000A1

公开(公告)日：2005-12-15

申请号：US11152156

申请日：2005-06-15

申请人： Makoto Nagao ,  Ryuji Sugita ,  Tadashi Yasunaga

发明人： Makoto Nagao ,  Ryuji Sugita ,  Tadashi Yasunaga

IPC分类号： G11B5/62 ,  G11B5/72 ,  G11B5/82 ,  G11B5/855 ,  G11B5/86 ,  G11B5/147 ,  B05D3/00

CPC分类号： G11B5/865 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B2005/0021

摘要： A magnetic recording medium containing a magnetic recording layer with a coercivity squareness ratio of 0.4 to 0.9 is produced by magnetic transfer, for which a magnetic field is applied to an unrecorded magnetic recording medium while maintaining a patterned side of the patterned master medium in close contact with the magnetic recording layer for magnetic transfer. At least portions of the patterned side are made of a soft-magnetic material, and the pattern formed on the patterned side has a bit length of 60 nm or smaller. It is possible to arrange the magnetic recording layer to have a coercive force of 398 kA/m or greater, reduce the bit length to 55 nm or smaller, and heat the magnetic recording layer to 100° C. or higher during application of the magnetic field.

摘要翻译： 通过磁转移产生含有矫顽力矩形比为0.4〜0.9的磁记录层的磁记录介质，对未记录的磁记录介质施加磁场，同时保持图案化主介质的图案侧紧密接触 与磁记录层进行磁转移。 图案化侧的至少一部分由软磁性材料制成，并且在图案化侧上形成的图案具有60nm或更小的位长度。 可以使磁记录层具有398kA / m以上的矫顽力，将位长度减小到55nm以下，并且在施加磁性时将磁记录层加热到100℃以上 领域。

公开(公告)号：US5567524A

公开(公告)日：1996-10-22

申请号：US379931

申请日：1995-01-27

申请人： Toshio Ishida ,  Masaki Satake ,  Hideomi Watanabe ,  Tadashi Yasunaga ,  Tsutomu Okita

发明人： Toshio Ishida ,  Masaki Satake ,  Hideomi Watanabe ,  Tadashi Yasunaga ,  Tsutomu Okita

IPC分类号： G11B5/66 ,  C10M105/54 ,  C10N40/18 ,  G11B5/64 ,  G11B5/65 ,  G11B5/72 ,  G11B5/725 ,  G11B5/735

CPC分类号： G11B5/725 ,  Y10S428/90 ,  Y10T428/30 ,  Y10T428/3154 ,  Y10T428/31678

摘要： A magnetic recording medium having a ferromagnetic metal thin film formed over at least one surface of a non-magnetic support, wherein the improvement has a lubricant layer consisting essentially of at least one of unsaturated bond-containing fluoroalkyl carboxylic acid esters which are represented by the following formulae (1) to (3):Rf--R.sub.1 --COO--R.sup.2 Formula (1)R.sup.3 --COO--R.sub.4 --Rf Formula (2)Rf--R.sup.5 --COO--R.sup.6 Rf Formula (3)where Rf: (CF.sub.3).sub.a CF.sub.3-a (CF.sub.2).sub.ba: 1 to 3 a+b: 1 to 17R.sup.1 is an alkyl group having from 2 to 18 carbon atoms, or a hydrocarbon group having from 2 to 18 carbon atoms and containing at least one double or triple bond, and R.sup.2 is an alkyl group having from 4 to 22 carbon atoms, or a hydrocarbon group having from 4 to 22 carbon atoms and containing at least one double or triple bond. At least either one of R.sup.1 and R.sup.2 contains at least one double or triple bond. R.sup.3 is an alkyl group having from 3 to 21 carbon atoms, and R.sup.4 is a hydrocarbon group having from 4 to 18 carbon atoms and containing at least one double or triple bond. R.sup.5 and R.sup.6 are each an alkyl group having from 2 to 18 carbon atoms, or a hydrocarbon group having from 2 to 18 carbon atoms and containing at least one double or triple bond. At least either one of R.sup.5 and R.sup.6 contains at least one double or triple bond. R.sup.5 and R.sup.6 have from 20 to 44 carbon atoms in total.

摘要翻译： 一种具有在非磁性载体的至少一个表面上形成的强磁性金属薄膜的磁记录介质，其中所述改进具有基本上由至少一种含不饱和键的氟烷基羧酸酯组成的润滑层，所述不饱和键的氟烷基羧酸酯由 （1）至（3）：Rf-R1-COO-R2（1）R3-COO-R4-Rf（2）Rf-R5-COO-R6RfFormula（3）其中Rf：（CF3）aCF3-a CF 2）ba：1〜3 a + b：1〜17 R 1为碳原子数2〜18的烷基或碳原子数为2〜18的含有至少一个双键或三键的烃基，R 2 是具有4至22个碳原子的烷基或具有4至22个碳原子并且含有至少一个双键或三键的烃基。 R1和R2中至少有一个含有至少一个双键或三键。 R3是具有3至21个碳原子的烷基，R4是具有4至18个碳原子并含有至少一个双键或三键的烃基。 R 5和R 6各自为具有2至18个碳原子的烷基或具有2至18个碳原子且含有至少一个双键或三键的烃基。 R5和R6中的至少一个含有至少一个双键或三键。 R5和R6总共具有20至44个碳原子。

公开(公告)号：US5556707A

公开(公告)日：1996-09-17

申请号：US401999

申请日：1995-03-10

申请人： Kazuyuki Usuki ,  Toshio Ishida ,  Tadashi Yasunaga

发明人： Kazuyuki Usuki ,  Toshio Ishida ,  Tadashi Yasunaga

IPC分类号： C10M105/00 ,  C10N40/18 ,  G11B5/64 ,  G11B5/66 ,  G11B5/71 ,  G11B5/72 ,  G11B5/725 ,  G11B5/735

CPC分类号： G11B5/725 ,  Y10S428/90 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31678

摘要： A metal thin film type magnetic recording medium which is excellent in running properties, durability and shelf stability. The magnetic recording medium has a ferromagnetic metal thin film formed over a non-magnetic base, and further has on the ferromagnetic metal thin film a lubricant layer containing a phosphoric monoester compound represented by the following formula (1), and an alkylene oxide group-containing fluorinated carboxylic acid ester compound represented by the following formula (2) or (3):R.sup.1 --OPO(OH).sub.2 Formula (1)where R.sup.1 is a hydrocarbon group having from 8 to 26 carbon atoms.Rf.sup.1 --R.sup.2 --COO--(R.sup.3 O).sub.n --R.sup.4 Formula (2)Rf.sup.2 --R.sup.2 --COO--(R.sup.3 O).sub.n --R.sup.4 --Rf.sup.3Formula (3)where Rf.sup.1, Rf.sup.2, Rf.sup.3 : (CF.sub.3).sub.a CF.sub.3-a (CF.sub.2).sub.b -- a: 1 to 3 a+b: 1 to 11 n=l to 8R.sup.2 is an alkylene or alkenyl group having from 2 to 14 carbon atoms;R.sup.3 is an alkylene group having from 1 to 4 carbon atoms; andR.sup.4 is an alkylene group having from 2 to 18 carbon atoms.

摘要翻译： 一种金属薄膜型磁记录介质，其运行性能，耐久性和货架稳定性优异。 磁记录介质具有在非磁性基底上形成的强磁性金属薄膜，并且在铁磁金属薄膜上还含有由下式（1）表示的磷酸单酯化合物的润滑层， （2）或（3）表示的含氟氟代羧酸酯化合物：R1-OPO（OH）2（1）其中R1是具有8至26个碳原子的烃基.Rf1-R2-COO-（ （3）其中Rf1，Rf2，Rf3：（CF3）aCF3-a（CF2）b-a：1〜3a +（R3O）n-R4Formula（2）Rf2-R2-COO-（R3O）n-R4-Rf3 b：1〜11 n = 1〜8 R2为碳原子数为2〜14的亚烷基或烯基， R3是具有1至4个碳原子的亚烷基; R4为碳原子数2〜18的亚烷基。

公开(公告)号：US5492764A

公开(公告)日：1996-02-20

申请号：US364410

申请日：1994-12-23

申请人： Tsutomu Okita ,  Toshio Ishida ,  Masaki Satake ,  Tadashi Yasunaga ,  Kazuyuki Usuki

发明人： Tsutomu Okita ,  Toshio Ishida ,  Masaki Satake ,  Tadashi Yasunaga ,  Kazuyuki Usuki

IPC分类号： G11B5/66 ,  C09D171/02 ,  C10M105/54 ,  C10M133/40 ,  C10M135/30 ,  C10N10/12 ,  C10N40/18 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73 ,  G11B5/00

CPC分类号： G11B5/72 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/31678

摘要： The magnetic recording medium of the present invention comprises a ferromagnetic metallic thin film formed on a non-magnetic support, whereby a protective layer is formed on the ferromagnetic metallic thin film, said protective layer contains at least one type of thiouracil cyclic compounds having hydrocarbon group and at least one type of fluorine compounds having hydrocarbon group, or at least one type of tetrazaindene cyclic compounds and at least one type of fluorine compounds having hydrocarbon group, and no rusting occurs even when it is repeatedly run.

摘要翻译： 本发明的磁记录介质包括在非磁性载体上形成的强磁性金属薄膜，由此在强磁性金属薄膜上形成保护层，所述保护层含有至少一种具有烃基的硫脲嘧啶环状化合物 和至少一种具有烃基的氟化合物，或至少一种类型的四氮茚环状化合物和至少一种具有烃基的氟化合物，即使反复进行也不会发生生锈。

公开(公告)号：US5322733A

公开(公告)日：1994-06-21

申请号：US755937

申请日：1991-09-06

申请人： Hiroaki Doushita ,  Tadashi Yasunaga

发明人： Hiroaki Doushita ,  Tadashi Yasunaga

IPC分类号： G11B5/66 ,  C08L67/02 ,  C23C14/00 ,  C23C14/08 ,  C23C14/20 ,  C23C14/56 ,  C23C14/58 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73 ,  G11B5/84 ,  G11B5/85 ,  B32B5/16 ,  B32B15/00

CPC分类号： C23C14/562 ,  C23C14/0021 ,  C23C14/085 ,  C23C14/20 ,  C23C14/58 ,  C23C14/584 ,  C23C14/5853 ,  G11B5/656 ,  G11B5/85 ,  Y10S428/90 ,  Y10T428/12931 ,  Y10T428/265

摘要： A metal thin-film magnetic recording medium has a non-magnetic base and a ferromagnetic metal thin-film formed on the non-magnetic base and containing therein Co as a major component. The ratio of the area of 130 plane of CoOOH of the metal thin-film to that of 111 plane of CoO of the same obtained by thin-film X-ray diffraction method is not smaller than 0.003 and is smaller than 0.1.

摘要翻译： 金属薄膜磁记录介质具有形成在非磁性基底上的非磁性基体和强磁性金属薄膜，其中Co作为主要成分。 通过薄膜X射线衍射法得到的CoOOH的130平面与CoO的111平面的面积的比例不小于0.003且小于0.1。

公开(公告)号：US5114778A

公开(公告)日：1992-05-19

申请号：US261068

申请日：1988-10-24

申请人： Akio Yanai ,  Tadashi Yasunaga

发明人： Akio Yanai ,  Tadashi Yasunaga

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

CPC分类号： G11B5/7325 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/24355

摘要： A magnetic recording medium having improved running properties and electromagnetic characteristics is disclosed, which comprises a non-magnetic support having provided thereon an underlayer and a magnetic layer composed of a thin ferromagnetic metal film in that order, said underlayer being composed mainly of a high molecular weight compound having on the surface thereof an uneven orange peel texture, wherein said underlayer has an average surface area of a unit cell of the uneven orange peel texture of from 3.times.10.sup.-6 to 3.times.10.sup.-3 mm.sup.2, and has a surface roughness of from 0.1 to 0.01 .mu.m.

摘要翻译： 公开了一种具有改善的运行特性和电磁特性的磁记录介质，其包括其上设置有底层的非磁性支撑体和由薄铁磁金属膜构成的磁性层，所述底层主要由高分子量 其表面上具有不均匀的橙皮纹理，其中所述底层具有不均匀橙皮纹理的单位晶胞的平均表面积为3×10 -6至3×10 -3 mm 2，并且具有0.1的表面粗糙度 至0.01亩。

公开(公告)号：US5069933A

公开(公告)日：1991-12-03

申请号：US634663

申请日：1990-12-27

申请人： Tadashi Yasunaga ,  Shiro Kaneko ,  Kunihiko Sano

发明人： Tadashi Yasunaga ,  Shiro Kaneko ,  Kunihiko Sano

IPC分类号： G11B5/85 ,  G11B5/64 ,  G11B5/84

CPC分类号： G11B5/656 ,  G11B5/84

摘要： A method for making a magnetic recording medium comprises the steps of forming a thin ferromagnetic metal film on a non-magnetic substrate. The thin ferromagnetic metal film contains Co as a main constituent and contains oxygen in a proportion of at least 15 at %. Thereafter, the thin ferromagnetic metal film is exposed to an ozone-containing atmosphere. A magnetic recording medium is thereby obtained, which exhibits excellent resistance to corrosion with salts and good electromagnetic transducing characteristics.

公开(公告)号：US4801500A

公开(公告)日：1989-01-31

申请号：US133829

申请日：1987-12-16

申请人： Tadashi Yasunaga ,  Akio Yanai

发明人： Tadashi Yasunaga ,  Akio Yanai

IPC分类号： G11B5/66 ,  C08L67/00 ,  G11B5/64 ,  G11B5/706 ,  G11B5/708 ,  G11B5/73

CPC分类号： G11B5/64 ,  Y10S428/90 ,  Y10T428/265

摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a thin ferromagnetic metal film, wherein the thin ferromagnetic metal film contains an iron atom, a nitrogen atom and an oxygen atom within the following atomic percent ranges:57.ltoreq.a.ltoreq.902.ltoreq.b.ltoreq.205.ltoreq.c.ltoreq.23b+c

摘要翻译： 描述了一种磁记录介质，其包括在其上设置有薄铁磁金属膜的非磁性载体，其中所述薄铁磁性金属膜在以下原子百分比范围内含有铁原子，氮原子和氧原子： 其中a，b和c分别表示铁原子，氮原子和氧原子的百分比，= a

公开(公告)号：US07359133B2

公开(公告)日：2008-04-15

申请号：US10167498

申请日：2002-06-13

申请人： Tadashi Yasunaga

发明人： Tadashi Yasunaga

IPC分类号： G11B5/09

CPC分类号： G11B5/584

摘要： A flexible recording medium, which has a track width in the range of approximately 1-3 μm, capable of facilitating good tracking control. A magnetic pattern bearing servo signals is provided on the guard bands formed on both sides of a data track of a magnetic recording medium. An improvement in tracking control is achieved by performing the servo tracking in a continuous manner.

摘要翻译： 具有约1-3μm范围内的轨道宽度的柔性记录介质能够有利于良好的跟踪控制。 在磁记录介质的数据轨迹的两侧形成的保护带上设有承载伺服信号的磁图案。 通过以连续的方式执行伺服跟踪来实现跟踪控制的改进。

公开(公告)号：US07193796B2

公开(公告)日：2007-03-20

申请号：US10875988

申请日：2004-06-25

申请人： Tadashi Yasunaga

发明人： Tadashi Yasunaga

IPC分类号： G11B5/86

CPC分类号： B82Y10/00 ,  G11B5/02 ,  G11B5/59633 ,  G11B5/59688 ,  G11B5/743 ,  G11B5/865

摘要： A patterned master carrier for magnetic transfer is used to transfer a magnetization pattern, which does not cause a problem such as an error attributable to a subpulse upon signal reproduction, to a slave medium. A signal pattern on a surface of a patterned master carrier for the magnetic transfer includes signal areas and no-signal areas, and the signal area is provided with an actual signal pattern and a dummy signal pattern adjacent to the no-signal area. Therefore, the actual signal pattern is not adjacent to the no-signal area.

摘要翻译： 用于磁转移的图案化主载体用于传送磁化模式，其不会在从属介质上引起诸如归属于子脉冲的误差的问题。 用于磁转印的图案化主载体的表面上的信号图案包括信号区域和无信号区域，并且信号区域被提供有与无信号区域相邻的实际信号图案和虚拟信号图案。 因此，实际信号图案不与无信号区域相邻。