公开(公告)号：EP0151445B2

公开(公告)日：1993-11-03

申请号：EP85100803.7

申请日：1985-01-26

Applicant: Hitachi Maxell Ltd.

Inventor： Wakai, Kunio ,  Niimi, Hideaki ,  Isoe, Noboru

IPC: G11B5/64 ,  G11B5/85

CPC classification number: C23C14/027 ,  C23C14/0021 ,  G11B5/64 ,  G11B5/85 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/24413 ,  Y10T428/24942

公开(公告)号：EP0355766A3

公开(公告)日：1991-02-27

申请号：EP89115378.5

申请日：1989-08-21

Applicant: Hitachi Maxell Ltd.

Inventor： Niimi, Hideaki ,  Mizumura, Tetsuo ,  Isoe, Noboru

IPC: G11B5/85 ,  C23C14/30 ,  C23C14/56 ,  H01J37/317 ,  H01J37/06

CPC classification number: C23C14/14 ,  C23C14/30 ,  G11B5/85 ,  H01J37/075 ,  H01J37/3053

Abstract: The present invention provides an electron beam heating vacuum deposition apparatus in which the generating body (5) of said electron beam comprises at least 95 at % of tantalum and a process for preparing a magnetic recording medium comprising vapor-depositing a ferromagnetic metal onto a non-magnetic substrate (12) with an electron beam heating vapor deposition apparatus, in which process the generating body (5) of said electron beam comprises at least 95 at % of tantalum.

公开(公告)号：EP0274437A3

公开(公告)日：1990-07-18

申请号：EP88300103.4

申请日：1988-01-07

Applicant: Hitachi Maxell Ltd.

Inventor： Isoe, Noboru ,  Mizumura, Tetsuo ,  Wakai, Kunio ,  Niimi, Hideaki

IPC: G11B5/64 ,  G11B5/72

CPC classification number: G11B5/64 ,  G11B5/722

Abstract: A magnetic recording medium comprising a non-magnetic substrate, a ferromagnetic metal (12) laid on the non-magnetic substrate (4) and a protective film (13) laid on the ferromagnetic metal film (12), the ferromagnetic metal film (12) and the protective film (13) being composed of aggregates of columnar particles inclined to the normal line to the non-magnetic substrate (4) and the protective film (13) being free of highly inclined aggregates of columnar particles has improved corrosion resistance and wearing resistance.

Abstract translation: 一种磁记录介质，包括非磁性基板，铺设在非磁性基板（4）上的强磁性金属（12）和铺设在强磁性金属膜（12）上的保护膜（13），强磁性金属膜 ）和保护膜（13）由柱状粒子的集合体组成，所述柱状粒子的集合体倾斜于非磁性基板（4）的法线并且保护膜（13）没有柱状粒子的高度倾斜的聚集体，具有改善的耐腐蚀性和 耐磨损。

公开(公告)号：EP0151445A3

公开(公告)日：1987-09-30

申请号：EP85100803

申请日：1985-01-26

Applicant: Hitachi Maxell Ltd.

Inventor： Wakai, Kunio ,  Niimi, Hideaki ,  Isoe, Noboru

IPC: G11B05/64 ,  G11B05/85

CPC classification number: C23C14/027 ,  C23C14/0021 ,  G11B5/64 ,  G11B5/85 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/24413 ,  Y10T428/24942

Abstract: A magnetic recording medium comprising a substrate and, as a recording layer, a ferromagnetic metal thin layer formed on the substrate by deposition, in which the ferromagnetic metal thin layer contains oxygen atom in such a manner that concentrations of oxygen atom in a surface layer and an interfacial layer adjacent to the substrate are higher than that in an intermediate layer between the surface and interfacial layers, which has improved coercive force and smaller magnetic domain.

公开(公告)号：EP0198472A2

公开(公告)日：1986-10-22

申请号：EP86105179.5

申请日：1986-04-15

Applicant: Hitachi Maxell Ltd.

Inventor： Niimi, Hideaki ,  Isoe, Noboru ,  Wakai, Kunio ,  Mizumura, Tetsuo

IPC: G11B5/66

CPC classification number: G11B5/66 ,  G11B5/72 ,  Y10S428/90 ,  Y10T428/265

Abstract: A magnetic recording medium comprising a substrate and a ferromagnetic metal layer, wherein the ferromagnetic metal layer has a skin layer consisting of an amorphous cobalt compound, X-ray photoelectron spectra of which is characterized in that, in the C 02 p spectrum, a ratio of a peak height at 785.9±0.3 eV to that at 780.0±0.3 eV is 40/100 or less when a background (BG) line is drawn between lower energy side leading edge points of peaks at 780.0±0.3 eV - (2p 3/2 ) and 795.6±0.3 eV (2p 1/2 ) and, in the O 1s spectrum, a ratio of a peak height at 529.3±0.4 eV to that at 530.8±0.4 eV is from 100:110 to 100:50 when a background line is drawn between the lower energy side leading edge point and the higher energy side leading edge point of a complex peak at 530.5±2.5 eV from which the peaks at 529.3±0.4 eV and 530.8±0.4 are derived by peak synthesis, which has good corrosion and wear resistance.

公开(公告)号：EP0151445A2

公开(公告)日：1985-08-14

申请号：EP85100803.7

申请日：1985-01-26

Applicant: Hitachi Maxell Ltd.

Inventor： Wakai, Kunio ,  Niimi, Hideaki ,  Isoe, Noboru

IPC: G11B5/64 ,  G11B5/85

CPC classification number: C23C14/027 ,  C23C14/0021 ,  G11B5/64 ,  G11B5/85 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/24413 ,  Y10T428/24942

Abstract: A magnetic recording medium comprising a substrate and, as a recording layer, a ferromagnetic metal thin layer formed on the substrate by deposition, in which the ferromagnetic metal thin layer contains oxygen atom in such a manner that concentrations of oxygen atom in a surface layer and an interfacial layer adjacent to the substrate are higher than that in an intermediate layer between the surface and interfacial layers, which has improved coercive force and smaller magnetic domain.

Abstract translation: 一种磁记录介质，包括基板和作为记录层的通过沉积形成在基板上的强磁性金属薄层，其中强磁性金属薄层含有氧原子，使得表面层中的氧原子的浓度和 与基板相邻的界面层高于表面和界面层之间的中间层，这具有改善的矫顽力和较小的磁畴。