公开(公告)号：EP0187169A3

公开(公告)日：1987-01-28

申请号：EP84116338

申请日：1984-12-27

Applicant: HITACHI METALS, LTD.

Inventor： Endo, Juro ,  Murakami, Shiro ,  Fujii, Shigeo ,  Nakao, Masayuki ,  Iimura, Tsutomu

IPC: G11B05/84 ,  H01F41/18 ,  G11B05/64 ,  H01F10/16

CPC classification number: G11B5/851 ,  G11B5/64

Abstract: A process of manufacturing Co-Ni magnetic recording media by sputtering Co-Ni thin film layer on a substrate in Argon atmosphere including nitrogen and heating the thin film to evaporate nitrogen from the thin film to prepare the magnetic recording media appropriate for high density longitudinal recording, wherein on sputtering the substrate is maintained at a temperature of room temperature to 300°C.

公开(公告)号：EP0116881A3

公开(公告)日：1986-10-22

申请号：EP84101074

申请日：1984-02-02

Applicant: KONISHIROKU PHOTO INDUSTRY CO. LTD.

Inventor： Naoe, Masahiko ,  Ishibashi, Shozo

IPC: G11B05/64 ,  G11B05/84 ,  H01F10/18

CPC classification number: G11B5/64 ,  G11B5/84 ,  H01F10/18

Abstract: A magnetic recording medium comprising a substrate and a magnetic layer thereon, the magnetic layer
(a) being a continuous magnetic layer made mainly from iron oxides, and (b) having not less than 0.5 of ratio between perpendicular-to-plane residual magnetization and in-plane residual magnetization of said magnetic layer, M V 'M H . A process of manufactuing a magnetic recording medium comprising a substrate and a continuous magnetic layer made mainly from iron oxides formed thereon and having not less than 0.5 of ratio between perpendicular-to-plane residual magnetization, M v , and in-plane residual magnetization, M H , of magnetic layer: M V /M H , comprising causing particles to be component of said magnetic layer to fly and be deposited on said substrate.

Abstract translation: 一种磁记录介质，包括基板和磁性层，所述磁性层（a）是主要由铁氧化物构成的连续磁性层，和（b）在垂直于平面之间的剩余磁化强度和 所述磁性层的平面内剩余磁化强度，MV / MH。 一种制造磁记录介质的方法，该磁记录介质包括主要由形成在其上的铁氧化物形成的基板和连续磁性层，并且具有不小于平面之间的剩余磁化强度，MV和面内剩余磁化强度之比的0.5; MH 的磁性层：MV / MH，包括使颗粒成为所述磁性层的组分飞散并沉积在所述衬底上。

公开(公告)号：EP0136631A3

公开(公告)日：1986-09-17

申请号：EP84111286

申请日：1984-09-21

Applicant: International Business Machines Corporation

Inventor： Eldridge, Jerome Michael ,  Homola, Andrew Marion

IPC: G11B05/84 ,  G11B05/702 ,  G11B05/70

CPC classification number: G11B5/702 ,  G11B5/84

Abstract: A hermetically encapsulated magnetic record member is produced by applying a liquid mixture containing one or more organometallic compounds, an organic solvent and magnetic particles to a thermally stable substrate, e.g. of silicon. The applied mixture is then heated to melt the glass in the organometallic compound so that upon cooling of the glass, the magnetic particles are encapsulated therein.

公开(公告)号：EP0104378A3

公开(公告)日：1986-03-12

申请号：EP83107788

申请日：1983-08-08

Applicant: BASF Aktiengesellschaft

Inventor： Kohl, Albert ,  Schneider, Norbert ,  Ley, Gregor, Dr. ,  Balz, Werner, Dr. ,  Melzer, Milena ,  Jakusch, Helmut, Dr.

IPC: G11B05/70 ,  G11B05/84

CPC classification number: G11B5/7013

公开(公告)号：EP0089609A3

公开(公告)日：1986-01-29

申请号：EP83102560

申请日：1983-03-15

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Sugita, Ryuji ,  Kanai, Kenji ,  Sasaki, Seishi ,  Takahashi, Ken

IPC: G11B05/84 ,  G11B05/66 ,  H01F41/20 ,  H01F10/16

CPC classification number: H01F41/20 ,  G11B5/66 ,  G11B5/851

Abstract: In manufacturing a magnetic recording medium by vapour-depositing a magnetic metal film (10) containing Co-Cr with 70 - 90 weight % Co as host material on a high polymer substrate (1), with or without intermediate layer(s) (8,9) inbetween, by making the high polymer substrate run around a cylindrical can (2), conditions are selected such that linear expansion coefficient of the substrate is 1.0 x 10 -5 -2.9 x 10 -5 /°C and temperature of the can surface is 150° - 300°C; thereby normal or inverse curling of the resultant recording medium is substantially eliminated.

公开(公告)号：EP0083753A3

公开(公告)日：1985-12-11

申请号：EP82111569

申请日：1982-12-14

Applicant: International Business Machines Corporation

Inventor： Bornhorst, Randy Joseph ,  Bowen, Arlen John

IPC: G11B05/84 ,  B24B07/00

CPC classification number: G11B5/84 ,  B24B39/06 ,  Y10T29/47

Abstract: The burnishing tool has a plurality of holes (41) in the planar surface (40) which engages the flexible magnetic disk (4). Each hole contains a burnishing blade (42) positioned at 45° to the direction of motion. A manifold (20) connects each hole to a vacuum pump which draws air into the holes causing the flexible magnetic disk to fly against the planar surface. The vacuum also removes the debris from the burnishing tool.

公开(公告)号：EP0078539A3

公开(公告)日：1985-09-11

申请号：EP82110098

申请日：1982-11-02

Applicant: FUJI PHOTO FILM CO., LTD.

Inventor： Asai, Takamitsu ,  Kitamoto, Tatsuji ,  Akashi, Goro

IPC: G11B05/84 ,  G11B05/70 ,  H01F01/11 ,  H01F01/08

CPC classification number: G11B5/845 ,  G11B5/70626 ,  G11B5/7085

Abstract: The present invention relates to an improved method for preparing a magnetic recording method having excellent magnetic orientation comprising the steps of 1) dispersing ferromagnetic fine particles which are plate-shaped and which have an axis of magnetization perpendicular to the plates of the particles in a binder and 2) coating a magnetic coating layer on a non-magnetic support wherein the method comprises, after coating the magnetic coating layer and before drying it, subjecting the surface of the magnetic layer to a magnetic field from the direction perpendicular to the support to produce a magnetic orientation while contacting the surface of the magnetic layer with a flexible smoothening sheet.

公开(公告)号：EP0073041A3

公开(公告)日：1985-03-13

申请号：EP82107650

申请日：1982-08-20

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Shinohara, Koichi

IPC: G11B05/84 ,  H01F41/20

CPC classification number: G11B5/851 ,  H01F41/20

Abstract: The invention provides a method and a device for mass-producing a magnetic recording medium which has excellent wear and corrosion resistances and uniform quality along the longitudinal and transverse directions of an elongated base body, wherein the elongated base body in a vacuum chamber is fed to continuously deposit a ferromagnetic material thereon, while a gas is sprayed in the vicinity of an incident angle control section of a mask for controlling an angle of incidence of a vapor flow from a vapor source to the elongated base body. The angle of incidence is kept constant to prevent deposition of the vapor material on the incident angle control section, and simultaneously, a uniform oxide film is formed on the ferromagnetic layer using a gas containing at least oxygen.

公开(公告)号：EP0054269A3

公开(公告)日：1983-08-10

申请号：EP81110352

申请日：1981-12-11

Applicant: TEIJIN LIMITED

Inventor： Kadokura, Sadao ,  Tomie, Takashi ,  Naoe, Masahiko

IPC: G11B05/64 ,  G11B05/84 ,  G11B05/70

CPC classification number: G11B5/64 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/31678

Abstract: Magnetic recording medium conventionally utilizes the in-plane magnetization mode, but, recently, the perpendicular magnetization mode utilizing the perpendicular anisotropy of an hcp cobalt alloy layer, in which C axis is oriented normal to the layer surface, is proposed. The known perpendicular magnetic recording medium has been produced by an RF sputtering, but such medium is of too low flexibility to use it in the form of a magnetic tape. In addition, the production rate of the perpendicular magnetic recording medium by RF sputtering is very low. The perpendicular magnetic recording medium is very flexible due to particle pattern (Figures 10, 12 and 13) completely distinct from the conventional columnar pattern (Figures 8 and 11). In addition, the production rate is high, because the base (20) is located beside a space between the targets (T,, T 2 ) of a sputtering device and further the magnetic field is generated perpendicularly to the sputtering surfaces (T 1s , T 25 ) by a field coil (31) or magnets (32,33). The present invention makes it possible to commercially produce the perpendicular magnetic recording medium, especially in the tape form.