公开(公告)号：US20090251814A1

公开(公告)日：2009-10-08

申请号：US12419652

申请日：2009-04-07

申请人： Yoichi Nishida ,  Hideyuki Kubota ,  Masakazu Nishikawa ,  Makoto Nagao ,  Ryuji Sugita ,  Takashi Komine

发明人： Yoichi Nishida ,  Hideyuki Kubota ,  Masakazu Nishikawa ,  Makoto Nagao ,  Ryuji Sugita ,  Takashi Komine

IPC分类号： G11B5/86

CPC分类号： G11B5/865 ,  B82Y10/00 ,  G11B5/743

摘要： The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including: a base material having convex portions on its surface, the convex portions being provided corresponding to the pattern of information; a magnetic layer deposited on at least top surfaces of the convex portions, and having perpendicular magnetic anisotropy; and a soft magnetic layer deposited on the surface of the magnetic layer.

摘要翻译： 本发明提供了一种磁传递主载体，当磁性载体和垂直磁性载体和垂直磁记录介质施加磁场时，形成对应于待记录在垂直磁记录介质上的信息图形的磁图案 所述载体包括：在其表面上具有凸起部分的基材，所述凸部相应于所述信息图案设置; 沉积在所述凸部的至少顶表面上并具有垂直磁各向异性的磁性层; 以及沉积在磁性层的表面上的软磁性层。

公开(公告)号：US20090244747A1

公开(公告)日：2009-10-01

申请号：US12410722

申请日：2009-03-25

申请人： Masakazu Nishikawa ,  Hideyuki Kubota ,  Makoto Nagao ,  Ryuji Sugita ,  Takashi Komine

发明人： Masakazu Nishikawa ,  Hideyuki Kubota ,  Makoto Nagao ,  Ryuji Sugita ,  Takashi Komine

IPC分类号： G11B5/86

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

摘要： To provide a magnetic transfer master carrier obtained by forming a perpendicular magnetic anisotropy magnetic layer over a surface of an original master which has a concavo-convex pattern, placing a base material against the formed perpendicular magnetic anisotropy magnetic layer, and separating the base material.

摘要翻译： 为了提供通过在具有凹凸图案的原始母板的表面上形成垂直磁各向异性磁性层而获得的磁转移主载体，将基材放置在形成的垂直磁各向异性磁性层上，并分离基材。

公开(公告)号：US20090128958A1

公开(公告)日：2009-05-21

申请号：US12275284

申请日：2008-11-21

申请人： Yoichi NISHIDA ,  Masakazu Nishikawa ,  Hideyuki Kubota ,  Ryuji Sugita ,  Takashi Komine

发明人： Yoichi NISHIDA ,  Masakazu Nishikawa ,  Hideyuki Kubota ,  Ryuji Sugita ,  Takashi Komine

IPC分类号： G11B5/82

CPC分类号： G11B5/865 ,  G11B5/855

摘要： A magnetic transfer master substrate for transferring magnetic information thereof to a perpendicular recording magnetic recording medium in contact therewith under application of a magnetic field comprises a transfer surface area with a magnetic layer formed thereon in a pattern according to the magnetic information to be transferred to the perpendicular magnetic recording medium and a non-transfer surface area laying below said transfer surface area, wherein the magnetic layer has a perpendicular magnetic anisotropy of an anisotropy energy higher than 4×106 erg/cm3.

摘要翻译： 用于将磁信息传送到与施加磁场接触的垂直记录磁记录介质的磁转移母板基板包括根据要传送到 垂直磁记录介质和放置在所述转印表面区域之下的非转印表面区域，其中所述磁性层具有高于4×10 6 erg / cm 3的各向异性能的垂直磁各向异性。

公开(公告)号：US06606209B2

公开(公告)日：2003-08-12

申请号：US10108032

申请日：2002-03-26

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Keizou Miyata ,  Hiroshi Ryonai

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Keizou Miyata ,  Hiroshi Ryonai

IPC分类号： G11B586

CPC分类号： G11B5/64 ,  G11B5/59638 ,  G11B5/59655 ,  G11B5/855 ,  G11B5/865

摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

公开(公告)号：US06088178A

公开(公告)日：2000-07-11

申请号：US760452

申请日：1996-12-06

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Hiroyuki Hasegawa

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Hiroyuki Hasegawa

IPC分类号： G11B5/66 ,  G11B5/00 ,  G11B5/008 ,  G11B5/02 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/23 ,  G11B5/245 ,  G11B5/64 ,  G11B5/78 ,  G11B20/14

CPC分类号： G11B5/65 ,  G11B5/00 ,  G11B5/00813 ,  G11B5/02 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/23 ,  G11B5/245 ,  G11B5/78

摘要： An apparatus for recording and reproducing a signal using a thin film magnetic tape as a medium and using ring type magnetic heads for recording and reproducing the signal, wherein the gap length of the magnetic head for reproducing is larger than the gap length of the magnetic head for recording. Maximum recording and reproducing performance is achieved by implementing separate recording and reproducing heads.

摘要翻译： 一种使用薄膜磁带作为介质来记录和再现信号的装置，并且使用环形磁头来记录和再现信号，其中用于再现的磁头的间隙长度大于磁头的间隙长度 用于录音。 通过实现单独的记录和再现头来实现最大记录和再现性能。

公开(公告)号：US5912783A

公开(公告)日：1999-06-15

申请号：US762958

申请日：1996-12-10

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Noriyasu Echigo ,  Hiroyuki Hasegawa

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Noriyasu Echigo ,  Hiroyuki Hasegawa

IPC分类号： G11B5/00 ,  G11B5/008 ,  G11B5/012 ,  G11B5/02 ,  G11B5/127 ,  G11B5/187 ,  G11B5/21 ,  G11B5/23 ,  G11B5/31

CPC分类号： G11B5/1878 ,  G11B5/00 ,  G11B5/008 ,  G11B5/00813 ,  G11B5/0086 ,  G11B5/012 ,  G11B5/02 ,  G11B5/1274 ,  G11B5/21 ,  G11B2005/0029 ,  G11B5/1278

摘要： In a magnetic recording and reproduction apparatus wherein signals are recorded with a ring-type magnetic head to a magnetic recording medium having axis of easy magnetization oblique with respect to a film normal of a magnetic layer of the medium A recording magnetic field generated by the magnetic head is asymmetric with respect to a center line of a gap of the magnetic circuit, and the recording magnetic field in the magnetic layer around a leading edge of the magnetic head is inclined at the same side as the axis of easy magnetization in the magnetic field in a normal plane of the magnetic layer including a direction of relative movement of the magnetic head to the magnetic recording medium when signals are recorded to the medium. Thus, signals can be recorded at a high density. Various types of magnetic head for generating asymmetric magnetic field are provided.

摘要翻译： 在磁记录和再现装置中，其中信号用环形磁头记录到具有相对于介质A的磁性层的膜法线倾斜的易磁化轴的磁记录介质的磁记录介质的磁记录磁场 头部相对于磁路的间隙的中心线是不对称的，并且磁头前缘周围的磁性层中的记录磁场在与磁场中容易磁化的轴线相同的一侧倾斜 在磁性层的正常平面中包括当信号被记录到介质时磁头与磁记录介质的相对运动的方向。 因此，可以以高密度记录信号。 提供了用于产生非对称磁场的各种类型的磁头。

公开(公告)号：US5901012A

公开(公告)日：1999-05-04

申请号：US896806

申请日：1997-07-18

申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Noriyasu Echigo

发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Noriyasu Echigo

IPC分类号： G11B5/00 ,  G11B5/008 ,  G11B5/012 ,  G11B5/02 ,  G11B5/127 ,  G11B5/187 ,  G11B5/21 ,  G11B5/235 ,  G11B5/31

CPC分类号： G11B5/1878 ,  G11B5/00 ,  G11B5/008 ,  G11B5/00813 ,  G11B5/0086 ,  G11B5/012 ,  G11B5/02 ,  G11B5/1274 ,  G11B5/21 ,  G11B2005/0029 ,  G11B5/1278

摘要： In a magnetic recording and reproduction apparatus wherein signals are recorded with a ring-type magnetic head to a magnetic recording medium having axis of easy magnetization oblique with respect to a film normal of a magnetic layer of the medium. A recording magnetic field generated by the magnetic head is asymmetric with respect to a center line of a gap of the magnetic circuit, and the recording magnetic field in the magnetic layer around a leading edge of the magnetic head is inclined at the same side as the axis of easy magnetization in the magnetic field in a normal plane of the magnetic layer including a direction of relative movement of the magnetic head to the magnetic recording medium when signals are recorded to the medium. Thus, signals can be recorded at a high density. Various types of magnetic head for generating asymmetric magnetic field are provided.

摘要翻译： 在磁记录和再现装置中，其中信号用环型磁头记录到具有相对于介质的磁性层的膜法线倾斜的易磁化轴的磁记录介质。 由磁头产生的记录磁场相对于磁路的间隙的中心线是不对称的，并且磁头前端周围的磁性层中的记录磁场在与磁头相同的一侧倾斜 包括在将信号记录到介质上时磁头相对于磁记录介质的相对运动的方向的磁性层的正常平面中的磁场中容易磁化的轴线。 因此，可以以高密度记录信号。 提供了用于产生非对称磁场的各种类型的磁头。

公开(公告)号：US5534324A

公开(公告)日：1996-07-09

申请号：US151704

申请日：1993-11-10

申请人： Ryuji Sugita ,  Kiyokazu Tohma ,  Tatsuaki Ishida ,  Yasuaki Ban

发明人： Ryuji Sugita ,  Kiyokazu Tohma ,  Tatsuaki Ishida ,  Yasuaki Ban

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  G11B5/85 ,  H01F1/00 ,  G11B5/70

CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12931

摘要： A magnetic recording medium has a cobalt-based first magnetic layer and a cobalt-based second magnetic layer which are formed on a substrate of high polymer by vacuum evaporation. In order to have a high reproducing output and a high S/N ratio, the first magnetic layer has high oxygen density area which is arranged at a vicinity of the second magnetic layer, and the second magnetic layer has high oxygen density area which is arranged at a vicinity of the first magnetic layer.

摘要翻译： 磁记录介质具有钴基第一磁性层和钴基第二磁性层，它们通过真空蒸镀形成在高分子的基片上。 为了具有高再现输出和高S / N比，第一磁性层具有高氧浓度区域，其布置在第二磁性层附近，并且第二磁性层具有高的氧气密度区域，其被布置 在第一磁性层附近。

公开(公告)号：US4547398A

公开(公告)日：1985-10-15

申请号：US549633

申请日：1983-11-04

申请人： Ryuji Sugita ,  Toshiaki Kunieda

发明人： Ryuji Sugita ,  Toshiaki Kunieda

IPC分类号： G11B5/851 ,  H01F41/20 ,  G11B5/84

CPC分类号： G11B5/851 ,  H01F41/20

摘要： A method for manufacturing a magnetic recording medium is proposed to determine an angle of incidence of vaporized atoms to be not more than 60.degree. at an initial period of formation of a magnetic film by the vapor deposition method on a substrate which is travelling. The magnetic film contains Co and Cr as major constituents and has an axis of easy magnetization normal to the surface thereof.

摘要翻译： 提出一种制造磁记录介质的方法，通过气相沉积法在正在行进的基板上，在形成磁性膜的初始阶段将汽化原子的入射角确定为不超过60°。 磁性膜含有Co和Cr作为主要成分，并且具有与其表面相一致的容易磁化的轴。

公开(公告)号：US4429016A

公开(公告)日：1984-01-31

申请号：US240368

申请日：1981-03-04

申请人： Ryuji Sugita

发明人： Ryuji Sugita

IPC分类号： G11B5/64 ,  G11B5/66

CPC分类号： G11B5/656 ,  Y10S428/90

摘要： The present invention relates to a magnetic recording medium of the vertical record type belonging to the Co-Cr series in which the residual magnetization is normal to said magnetic medium, characterized by the fact that Cr is present in an amount of 13 to 28% by weight based on the total of Co and Cr and the value of the saturation magnetization of said magnetic medium is larger than that of the bulk having the same composition as the mean value of composition of said magnetic medium.

摘要翻译： 本发明涉及属于Co-Cr系列的垂直记录类型的磁记录介质，其中剩余磁化强度与所述磁介质垂直，其特征在于Cr以13-28％的量存在， 基于Co和Cr的总和的重量和所述磁性介质的饱和磁化强度的值大于具有与所述磁介质的组成的平均值相同组成的本体的重量。