公开(公告)号：US5055351A

公开(公告)日：1991-10-08

申请号：US257086

申请日：1988-10-13

申请人： Ryo Fujimoto ,  Katsumi Arisaka ,  Takao Sasakura ,  Hiroshi Takagi ,  Kenji Suzuki ,  Akira Shinmi ,  Rieko Kanome ,  Morimi Hashimoto ,  Nobuyuki Saito

发明人： Ryo Fujimoto ,  Katsumi Arisaka ,  Takao Sasakura ,  Hiroshi Takagi ,  Kenji Suzuki ,  Akira Shinmi ,  Rieko Kanome ,  Morimi Hashimoto ,  Nobuyuki Saito

IPC分类号： G11B5/73

CPC分类号： G11B5/64 ,  G11B5/7315 ,  G11B5/656 ,  Y10S428/90 ,  Y10T428/265

摘要： A magnetic recording medium comprises at least a magnetic recording layer of a metal thin film on a substrate, wherein the stiffness 1/k.sub.O [kgfmm] of the whole medium is within the following range: ##EQU1## [n is a number of layers constituting the magnetic recording medium] E.sub.k : Young's modulus of the k th layer [unit:kgf/mm.sup.2 ]I.sub.k :moment of inertia of the k th layer [unit:mm.sup.3 ]and the shape of the medium is a disc shape.

摘要翻译： 磁记录介质至少包括在基板上的金属薄膜的磁记录层，其中整个介质的刚度1 / kO [kgfmm]在以下范围内：0.35×10-11

公开(公告)号：US4835069A

公开(公告)日：1989-05-30

申请号：US637279

申请日：1984-08-03

申请人： Takeshi Sawada ,  Akira Shinmi ,  Hiroshi Takagi ,  Kenji Suzuki ,  Fumio Kishi ,  Susumu Kozuki

发明人： Takeshi Sawada ,  Akira Shinmi ,  Hiroshi Takagi ,  Kenji Suzuki ,  Fumio Kishi ,  Susumu Kozuki

IPC分类号： G11B5/64

CPC分类号： G11B5/64 ,  Y10S428/90

摘要： A magnetic recording medium having a magnetic layer formed by a thin film deposition method, said magnetic layer comprising Fe as the principal component together with Co, Ni, and Cr, further containing at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, W, Cu, Mn and Sb.

摘要翻译： 一种具有通过薄膜沉积方法形成的磁性层的磁记录介质，所述磁性层包括以Co，Ni和Cr为主成分的Fe作为主要成分，还含有选自Ti，Zr， Hf，V，Nb，Ta，Mo，W，Cu，Mn和Sb。

公开(公告)号：US4673612A

公开(公告)日：1987-06-16

申请号：US813853

申请日：1985-12-27

申请人： Hiroshi Takagi ,  Akira Shinmi ,  Kenji Suzuki

发明人： Hiroshi Takagi ,  Akira Shinmi ,  Kenji Suzuki

IPC分类号： C08L79/08 ,  G11B5/73 ,  G11B5/704

CPC分类号： G11B5/73 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/31721

摘要： A magnetic recording medium, comprising an aromatic polyimide film and a magnetic layer of a ferromagnetic material provided on the aromatic polyimide film. The aromatic polyimide film is prepared by imidation of a film formed from a solution of a polyamic acid solution obtained by copolymerization of an aromatic amine component comprising at least 30 mole % of p-phenylene diamine and 0 to 70 mole % of diaminodiphenylether, respectively based on the total amount of the aromatic amine component, and a tetracarboxylic acid dianhydride.

摘要翻译： 一种磁记录介质，包括芳族聚酰亚胺膜和设置在芳族聚酰亚胺膜上的铁磁材料的磁性层。 芳族聚酰亚胺膜通过将由通过将包含至少30摩尔％的对苯二胺和0至70摩尔％的二氨基二苯基醚的芳族胺组分分别基于共聚合得到的聚酰胺酸溶液的溶液 关于芳族胺组分的总量和四羧酸二酐。

公开(公告)号：US4567116A

公开(公告)日：1986-01-28

申请号：US635234

申请日：1984-07-27

申请人： Takeshi Sawada ,  Akira Shinmi ,  Hiroshi Takagi ,  Kenji Suzuki ,  Fumio Kishi ,  Susumu Kozuki

发明人： Takeshi Sawada ,  Akira Shinmi ,  Hiroshi Takagi ,  Kenji Suzuki ,  Fumio Kishi ,  Susumu Kozuki

IPC分类号： G11B5/64

CPC分类号： G11B5/64 ,  Y10S428/90

摘要： A magnetic recording medium having a magnetic layer formed by a thin film deposition method, characterized in that the magnetic layer contains Fe as the principal component, Co, Ni and at least one of Mn, Cu, V, Nb, Ta, Mo, W, Ti, Zr and Hf.

摘要翻译： 一种具有通过薄膜沉积方法形成的磁性层的磁记录介质，其特征在于，磁性层含有Fe作为主要成分，Co，Ni和Mn，Cu，V，Nb，Ta，Mo，W ，Ti，Zr和Hf。

公开(公告)号：US5000995A

公开(公告)日：1991-03-19

申请号：US287015

申请日：1988-12-21

申请人： Fumio Kishi ,  Takayuki Yagi ,  Kenji Suzuki ,  Hiroshi Takagi

发明人： Fumio Kishi ,  Takayuki Yagi ,  Kenji Suzuki ,  Hiroshi Takagi

IPC分类号： G11B5/85 ,  H01F41/14

CPC分类号： G11B5/85 ,  Y10S428/90

摘要： A method for preparing a magnetic recording medium comprises forming a magnetic recording layer on a substrate by the physical vapor deposition method, wherein the incident angle on initiation of film formation of the flux of particles is 60.degree. or more and the incident angle on finishing of film formation is 0.degree. to 45.degree. and said recording layer is a vertically magnetized film.

摘要翻译： 一种制备磁记录介质的方法包括：通过物理气相沉积法在基片上形成磁记录层，其中，粒子通量成膜开始时的入射角为60°以上，精加工时的入射角 膜形成为0°〜45°，所述记录层为垂直磁化膜。

公开(公告)号：US4910068A

公开(公告)日：1990-03-20

申请号：US151310

申请日：1988-02-01

申请人： Hiroshi Takagi ,  Morimi Hashimoto ,  Nobuyuki Saito ,  Kenji Suzuki

发明人： Hiroshi Takagi ,  Morimi Hashimoto ,  Nobuyuki Saito ,  Kenji Suzuki

IPC分类号： G11B5/73 ,  G11B5/733

CPC分类号： G11B5/733 ,  Y10S428/90 ,  Y10T428/31721

摘要： A magnetic recording medium comprises a substrate composed of a polyimide film bearing, on a face thereof, a polyimide coated layer containing inorganic particles dispersed therein, and a magnetic recording layer formed on said polyimide coated layer.A magnetic recording medium comprises a substrate composed of a polyimide film containing inorganic particles dispersed therein and bearing, on a face thereof, a polyimide coated layer containing inorganic particles dispersed therein, and a magnetic recording layer formed on the other face of said polyimide film, wherein the average particle size of the inorganic particles dispersed in said polyimide film is smaller than that of the inorganic particles dispersed in said polyimide coated layer.A magnetic recording medium comprises a magnetic recording layer formed by a thin film deposition process on a substrate, wherein said substrate is provided, on the surface thereof, with small projections with a density of 10.sup.5 to 10.sup.8 projections/mm.sup.2, and the statistical distribution of the heights of said projections satisfies following relations H.sub.0.01 120 .ANG., H.sub.1 >100 .ANG. and H.sub.0.1 -H.sub.1

公开(公告)号：US4913933A

公开(公告)日：1990-04-03

申请号：US283904

申请日：1988-12-13

申请人： Yuji Kasanuki ,  Takayuki Yagi ,  Kenji Suzuki ,  Hiroshi Takagi

发明人： Yuji Kasanuki ,  Takayuki Yagi ,  Kenji Suzuki ,  Hiroshi Takagi

IPC分类号： G11B5/84 ,  G11B5/85 ,  G11B5/851

CPC分类号： G11B5/84 ,  G11B5/85

摘要： A method for preparing a magnetic recording medium comprises delivering a substrate from a delivery roller, passing the substrate through one or a plurality of conveying rollers and forming a magnetic recording layer on said substrate by the physical vapor deposition method in the course of running along the circumferential surface of a rotatory drum, characterized in that said substrate is heated between the delivery roller and the conveying roller or between a conveying roller and another conveying roller, and the conveying roller through which said substrate passes after heating is made an expander roller.

摘要翻译： 一种制备磁记录介质的方法，包括从输送辊输送基板，使基板通过一个或多个输送辊，并且在沿着沿着该方向运行的过程中通过物理气相沉积法在所述基板上形成磁记录层 旋转鼓的圆周表面，其特征在于，所述基底在输送辊和输送辊之间或输送辊与另一输送辊之间加热，加热后所述基板通过的输送辊成为膨胀辊。

公开(公告)号：US4816351A

公开(公告)日：1989-03-28

申请号：US832723

申请日：1986-02-25

申请人： Hiroshi Takagi ,  Morimi Hashimoto ,  Kenji Suzuki

发明人： Hiroshi Takagi ,  Morimi Hashimoto ,  Kenji Suzuki

IPC分类号： G11B5/66

CPC分类号： G11B5/66

摘要： A magnetic recording medium is formed by disposing on a substrate a magnetic recording layer comprising a vertically magnetizable film of Co alone or a Co alloy, or Fe alone or a ferromagnetic Fe alloy. The lubricity, wear resistance and corrosion resistance of the magnetic recording medium are improved by forming an upper layer of Co oxide on the magnetic recording layer. The upper layer per se can be a magnetizable film, particularly a vertically magnetizable film.

摘要翻译： 通过在基板上设置包含单独的Co的可垂直磁化膜或Co合金或单独的Fe或铁磁Fe合金的磁记录层来形成磁记录介质。 通过在磁记录层上形成Co氧化物上层，提高了磁记录介质的润滑性，耐磨性和耐腐蚀性。 上层本身可以是可磁化膜，特别是可垂直磁化的膜。

公开(公告)号：US5140938A

公开(公告)日：1992-08-25

申请号：US681469

申请日：1991-04-04

申请人： Yuji Kasanuki ,  Takayuki Yagi ,  Kenji Suzuki ,  Hiroshi Takagi

发明人： Yuji Kasanuki ,  Takayuki Yagi ,  Kenji Suzuki ,  Hiroshi Takagi

IPC分类号： G11B5/84 ,  G11B5/85

CPC分类号： G11B5/84 ,  G11B5/85

摘要： A physical vapor deposition device having a delivery roller for delivering a substrate, a rotatory drum upon which a magnetic recording layer is formed on the substrate and a wind-up roller which winds up said substrate. The device also has a heating source ahead of the rotatory drum and one or more conveying rollers, wherein one of the conveying rollers is an expander roller which is provided between the delivery roller and the rotatory drum. A thin film forming device uses the expander roller and also has a delivery roller, at least one conveying roller and a wind-up roller.

摘要翻译： 一种物理气相沉积装置，具有用于输送基板的输送辊，旋转鼓，基板上形成有磁记录层，卷绕辊将所述基板卷起。 该装置还具有在旋转鼓前面的加热源和一个或多个输送辊，其中一个输送辊是设置在输送辊和转鼓之间的膨胀辊。 薄膜形成装置使用膨胀辊，并且还具有输送辊，至少一个输送辊和卷绕辊。

公开(公告)号：US5139849A

公开(公告)日：1992-08-18

申请号：US789791

申请日：1991-11-12

申请人： Hiroshi Takagi ,  Morimi Hashimoto ,  Nobuyuki Saito ,  Kenji Suzuki

发明人： Hiroshi Takagi ,  Morimi Hashimoto ,  Nobuyuki Saito ,  Kenji Suzuki

IPC分类号： G11B5/73

CPC分类号： G11B5/73 ,  Y10S428/90 ,  Y10T428/24372 ,  Y10T428/2998 ,  Y10T428/31721

摘要： A magnetic recording medium comprises a substrate composed of a polyimide film bearing, on a face thereof, a polyimide coated layer containing inorganic particles dispersed therein, and a magnetic recording layer formed on said polyimide coated layer.A magnetic recording medium comprises a substrate composed of a polyimide film containing inorganic particles dispersed therein and bearing, on a face thereof, a polyimide coated layer containing inorganic particles dispersed therein, and a magnetic recording layer formed on the other face of said polyimide film, wherein the average particle size of the inorganic particles dispersed in said polyimide film is smaller than that of the inorganic particles dispersed in said polyimide coated layer.A magnetic recording medium comprises a magnetic recording layer formed by a thin film deposition process on a substrate, wherein said substrate is provided, on the surface thereof, with small projections with a density of 10.sup.5 to 10.sup.8 projections/mm.sup.2, and the statistical distribution of the heights of said projections satisfies following relations H.sub.0.01 120 .ANG., H.sub.1 >100 .ANG. and H.sub.0.1 -H.sub.1 120 .ANG.H.sub.1 >0.35din which d is the average particle size of the inorganic particles; .sigma. is the deviation in said particle size; and H.sub.0.01, H.sub.0.1 and H.sub.1 are the heights of projections respectively corresponding to 0.01%, 0.1% and 1% of the total number of projections in the descending order of height.