公开(公告)号：EP0190854A3

公开(公告)日：1988-07-20

申请号：EP86300514

申请日：1986-01-27

Applicant: TORAY INDUSTRIES, INC.

Inventor： Akamatsu, Takayoshi ,  Oka, Tethuo ,  Hayashi, Kenji

IPC: G11B05/85 ,  H01F41/22 ,  G11B05/66

CPC classification number: G11B5/66 ,  G11B5/85

Abstract: In a process involving the successive formation of a soft magnetic film substantially consisting of Fe and Ni and a perpendicular magnetic film on a plastic substrate, the soft magnetic film is vacuum-deposited while its formation position is irradiated with an ion-beam so as to prevent cracks and lessen coercive force. Apparatus for carrying out the deposition of the soft magnetic film includes a vacuum chamber (8) divided by a partition (7) into an upper chamber (9) and a lower chamber (10) which can be exhausted through outlets (11) and (12). The film substrate strip (6) is fed from a roll (1) round a cooled drum (3) to a winder (5). An evaporator (16) contains an iron-nickel ingot (15), and ion-beam radiation issues from the source (17). A screen (13) has an aperture (14) which limits the incident angle of the ion-beam onto the position of the substrate (6) passing round the drum (3).

Abstract translation: 在包括在Fe基上由Fe和Ni构成的软磁性膜和在塑料基板上形成垂直磁性膜的过程中，软磁膜被真空沉积，而其形成位置用离子束照射， 防止裂纹，减轻矫顽力。 用于进行软磁性膜沉积的装置包括由分隔件（7）分成上室（9）的真空室（8）和可通过出口（11）和（ 12）。 薄膜基材条（6）从卷（1）在冷却的滚筒（3）周围进给到卷绕机（5）。 蒸发器（16）包含铁镍锭（15），并且源（17）发出离子束辐射。 屏幕（13）具有将离子束的入射角限制在通过滚筒（3）的基板（6）的位置上的孔（14）。

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：EP0203582A3

公开(公告)日：1988-07-13

申请号：EP86107229

申请日：1986-05-28

Applicant: Hitachi Maxell Ltd.

Inventor： Shibasaki, Susumu ,  Wakai, Kunio

IPC: G11B05/85 ,  G11B05/84

CPC classification number: G11B5/84 ,  G11B5/85

Abstract: A method of and an apparatus for making a magnetic recording tape, which is free from wrinkles formed thereon, by the use of a vapor deposition technique. A length of take reeled on a supply reel is taken up by a take-up reel after having passed through a deposition station where it is movably turned around a cylindrical drum. In one aspect, the difference in tension between two different portions of the tape moving between the drum and the tape-up reel and on respective sides of a tensioning roll forming a part of at least one tension control mechanism is adjusted to a value not greater than 10 N/mm 2 . In another aspect, a charge eraser is employed and installed in the vicinity of the drum for removing an electrostatic charge built up in the tape being moved from the drum onto the take-up reel. In a further aspect, the cylindrical drum is used having its outer peripheral surface roughened to a ten-point average surface roughness of not smaller than 0.1 µm.

公开(公告)号：EP0191406A3

公开(公告)日：1988-07-13

申请号：EP86101448

申请日：1986-02-04

Applicant: Research Development Corporation of Japan ,  SONY CORPORATION

Inventor： Iwasaki, Kazuharu

IPC: G11B05/85 ,  G11B05/84

CPC classification number: G11B5/84 ,  G11B5/85

Abstract: A manufacturing process of a magnetic recording medium comprising a composite film of an organic polymer and a ferromagnetic substance on an non-magnetic support means using a multicomponent simultaneous vapor deposition process, in which process an incident beam (a) of the organic polymer (A) is irradiated on the support means (substrate 1) at an incident angle (ψ 1 ) in the range of 60° 1 ≦90° while an incident beam (b) of the ferromagnetic substance (B) is irradiated thereon so as not to be overlapped with the incident beam (a) of the organic polymer (A), to form a high density magnetic recording medium having an improved magnetic property and having a magnetic anisotropy in the direction either perpendicular to or parallel to the surface of the magnetic film by selectively setting the incident direction (b) of the magnetic substance (B) in relation to the incident direction (a) of the organic polymer (A).

公开(公告)号：EP0179382A3

公开(公告)日：1987-12-02

申请号：EP85113015

申请日：1985-10-14

Applicant: HITACHI, LTD. ,  Hitachi Maxell Ltd.

Inventor： Futamoto, Masaaki ,  Honda, Yukio ,  Asada, Seiichi ,  Nishimura, Takashi Hitachi Daini Kyoshinryo ,  Yoshida, Kazuetsu ,  Ishihara, Heigo

IPC: G11B05/64 ,  G11B05/72 ,  G11B05/85

CPC classification number: G11B5/72 ,  G11B5/851 ,  Y10S428/90

Abstract: A magnetic recording medium comprising a substrate, a ferromagnetic thin film formed on the substrate, and a protective film formed directly on the ferromagnetic thin film, and a process for producing such magnetic recording medium. The expression "formed directly" refers to the technique for forming the protective film on the ferromagnetic thin film so that the interface therebetween is free from contamination by, for instance, conducting the protective film formation under the vacuum used when forming the ferromagnetic thin film.