公开(公告)号：EP0178685A3

公开(公告)日：1988-01-20

申请号：EP85113267

申请日：1985-10-18

Applicant: SONY CORPORATION

Inventor： Tanaka, Toshikazu c/o Sony Corporation ,  Nakamura, Etsuko c/o Sony Corporation ,  Katahira, Taku c/o Sony Corporation

IPC: G11B05/70 ,  G11B05/66 ,  H01F10/14

CPC classification number: G11B5/66

Abstract: @ A magnetic recording medium suitable for use in a single-pole type recording system utilizing a perpendicular magnetization mode, the medium including a nonmagnetic base, a low coercive force layer on the base, and a magnetic recording layer overlying the low coercive force layer. The magnetic recording layer has an easy axis of magnetization perpendicular to the nonmagnetic base. The nonmagnetic bass is composed of a material which is stable at a temperature of 220°C and higher. In accordance with the invention, the low coercive force layer is an iron-nickel alloy containing about 82 to 89.5 by weight nickel, the low coercive force layer resulting from vapor phase deposition of the alloy on the nonmagnetic base while the temperature of the base is at least 220°C.

公开(公告)号：EP0175614A3

公开(公告)日：1987-03-25

申请号：EP85401751

申请日：1985-09-09

Applicant: Shin-Etsu Chemical Co., Ltd.

Inventor： Iida, Tamaki ,  Inoue, Kaname

IPC: G11B05/66

CPC classification number: G11B5/725 ,  Y10S428/90 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31663

Abstract: 57 A manufacturing method for a magnetic recording medium is disclosed which comprises the steps of forming a metallic magnetic layer on a non-magnetic substrate such as a polyester film with or without a non-magnetic metal layer deposited thereon by a method of electroless plating or electroplating, forming a vapor-phase plasma-polymerized layer of a silane compound, e.g. 1,1,2,2-tetramethyl disilane and 1,1,2,2,3,3-hexamethyl trisilane, and forming a thin layer of a fluorocarbon resin. The thus manufactured magnetic recording medium has advantages in several properties such as the surface lubricity sufficient to give satisfactory smoothness of travelling, durability in abrasion resistance and weatherability.

公开(公告)号：EP0122326A3

公开(公告)日：1986-06-04

申请号：EP83111784

申请日：1983-11-24

Applicant: KNOGO CORPORATION

Inventor： Klinkhardt, Erhard

IPC: G11B05/66 ,  G06K19/02 ,  G08B13/24

CPC classification number: G08B13/2411 ,  G06K19/022 ,  G08B13/244 ,  G08B13/2442 ,  G11B5/66

Abstract: Security strips containing magnetizable components, which are used, for example, to safeguard articles in stores, are manufactured by first applying to a continuous carrier band (11) which is moved progressively in fixed cycles and which has a double-sided adhesive film (11'), strip sections or elements (13') of a hard magnetic material which are spaced equally and which are fed from supply reels (12) and cut into lengths, or a continuous strip (13") of a hard magnetic material respectively, and then a continuous band (16) of a soft magnetic material and a continuous cover band (17) are drawn off simultaneously from supply reels (14 and 15), are laminated and then combined by means of a rolling process with the carrier band (11) carrying the hard magnetic strip sections or elements (13' or 13") respectively, to form a security strip assembly (200); and thereafter the multilayer, continuous security strip assembly (200) is passed through a demagnetizing device (109) and is then wound onto a takeup reel (108).

Abstract translation: 通过首先施加到以固定循环逐渐移动并且具有双面粘合膜（11）的连续载带（11），制造包含用于例如在商店中保护物品的可磁化部件的安全带 min），分别均匀分配并从供给卷轴（12）进给并切割成长度的硬磁性材料的带状部分或元件（13分钟）或硬磁性材料的连续条带（13秒） 然后从供应卷轴（14和15）同时抽出软磁材料和连续覆盖带（17）的连续带（16），然后通过滚动过程与载带（ 分别承载硬磁条段或元件（13分钟或13秒），以形成安全带组件（200）; 然后将多层连续的安全带组件（200）通过去磁装置（109），然后卷绕到卷取卷轴（108）上。

公开(公告)号：EP0105705A3

公开(公告)日：1986-03-19

申请号：EP83305815

申请日：1983-09-28

Applicant: HITACHI, LTD. ,  Hitachi Maxell Ltd.

Inventor： Uesaka, Yasutaro ,  Hishiyama, Sadao ,  Kitada, Masahiro ,  Shimizu, Noboru ,  Tanabe, Hideo ,  Fujiwara, Hideo

IPC: G11B05/66 ,  G11B05/70

CPC classification number: G11B5/00 ,  G11B5/66 ,  G11B5/70 ,  Y10S428/90 ,  Y10T428/24975

Abstract: in a perpendicular magnetic recording medium comprising a high permeability film (3) and a perpendicular magnetization film (4) which are laminated on a non-magnetic substrate (1), a perpendicular magnetic recording medium (5) is provided wherein a permanent magnet film (2) is further sandwiched between the non-magnetic substrate (1) and the high permeability film (3), thereby eliminating a spike noise.

公开(公告)号：WO1997018556A1

公开(公告)日：1997-05-22

申请号：PCT/JP1996003364

申请日：1996-11-15

Applicant: TAKAHASHI, Migaku

IPC: G11B05/66

CPC classification number: G11B5/7325 ,  G11B5/656 ,  Y10S428/90 ,  Y10T428/24355

Abstract: A magnetic recording medium comprising a smooth recording layer constituted of magnetic particles having a small size, which has a high coercive force. The magnetic recording medium comprises a base, a Cr undercoat with an oxygen content of 100 wt.ppm or less, and a ferromagnetic metal layer made of CoCrTa having an oxygen content of 100 wt.ppm or less, and which utilizes magnetic inversion. The ferromagnetic metal layer comprises 14 to 23 atm% chromium (Cr), 2 to 8 atm% tantalum (Ta) and the balance of cobalt (Co).

Abstract translation: 一种磁记录介质，包括由具有高矫顽力的小尺寸的磁性颗粒构成的平滑记录层。 磁记录介质包括基底，氧含量为100重量ppm以下的Cr底涂层，以及由氧含量为100重量ppm以下的CoCrTa构成的强磁性金属层，利用磁性反转。 强磁性金属层含有14〜23atm％的铬（Cr），2〜8atm％的钽（Ta）和余量的钴（Co）。

公开(公告)号：WO1996027878A1

公开(公告)日：1996-09-12

申请号：PCT/JP1995000381

申请日：1995-03-08

Applicant: TAKAHASHi, Migaku

IPC: G11B05/66

CPC classification number: G11B5/7315 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/8404 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

Abstract: A magnetic recording medium having a large coercive force independent of the material of the substrate by employing a alpha -rich layer and a beta -rich layer. The magnetic recording medium, using magnetic inversion, comprises a substrate and a ferromagnetic Co-alloy layer on the surface of the substrate. Between the substrate and the magnetic layer may be interposed a Cr-containing matallic base layer. The base layer and/or the ferromagnetic alloy layer has an oxygen concentration of not more than 100 wt ppm. An alpha -rich layer of nickel, phosphorus, and their oxides, and a beta -rich layer containing an ester group are provided between the substrate and the base layer or the ferromagnetic alloy layer. In the manufacturing process according to the present invention, the alpha -rich layer, beta -rich layer, metal ground layer and ferromagnetic metal layer are formed at pressure below the order of 10 Torr.

Abstract translation: 一种磁记录介质，通过采用富α层和富含β-的层，具有独立于衬底材料的矫顽力。 使用磁性反转的磁记录介质在衬底的表面上包括衬底和铁磁Co合金层。 在基板和磁性层之间可以插入含Cr的金属基层。 基底层和/或铁磁性合金层的氧浓度不大于100重量ppm。 在基板和基底层或铁磁性合金层之间设置有镍，磷及其氧化物的富Al层，含有酯基的富含β-的层。 在根据本发明的制造方法中，在低于10 -9 Torr的压力下形成富Al层，富二氧化硅层，金属接地层和强磁性金属层。

公开(公告)号：WO1996027877A1

公开(公告)日：1996-09-12

申请号：PCT/JP1995000380

申请日：1995-03-08

Applicant: TAKAHASHI, Migaku

IPC: G11B05/66

CPC classification number: G11B5/7325 ,  G11B5/64 ,  G11B5/656 ,  G11B5/8404 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

Abstract: A mass-producible magnetic recording medium having a ferromagnetic metal layer comprising CoNiCr or CoCrPt alloy, which has a high S/N ratio of electromagnetic conversion and a stable coercive force. The magnetic recording medium, using magnetic inversion, has a ferromagnetic metal layer comprising CoNiCr or CoCrPt formed on a surface of a substrate with a metallic base layer therebetween. The ferromagnetic metal layer has an oxygen concentration of not more than 100 wt ppm and contains crystal grains with an amorphous grain boundary. In the manufacturing process according to the present invention, the metallic base layer and/or the ferromagnetic metal layer is formed on the substrate at 60 DEG C-150 DEG C.

Abstract translation: 具有包含CoNiCr或CoCrPt合金的强磁性金属层的大规模生产的磁记录介质，其具有高的电磁转换的S / N比和稳定的矫顽力。 使用磁性反转的磁记录介质具有包含CoNiCr或CoCrPt的强磁性金属层，其形成在基板表面上，金属基层在其间。 铁磁性金属层的氧浓度为100重量ppm以下，且含有非晶质晶界的晶粒。 在本发明的制造方法中，金属基层和/或强磁性金属层在基板上形成在60℃〜150℃。

公开(公告)号：WO1992016938A1

公开(公告)日：1992-10-01

申请号：PCT/JP1992000317

申请日：1992-03-18

Applicant: TDK CORPORATION

Inventor： TDK CORPORATION ,  TAKAI, Mitsuru ,  KOBAYASHI, Koji ,  YOSHINARI, Jiro

IPC: G11B05/66

CPC classification number: G11B5/85 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/265

Abstract: A vertical magnetic recording medium comprising a magnetic layer having the constitution in which two ferromagnetic metallic thin films made of columnar crystal particles are laminated, wherein the angle Υ between the average growth direction of columnar crystal particles and the substrate normal is equal to or larger than 45° at the lower layer and equal to or smaller than 30° at the upper layer, and the average maximum diameter of the lower-layer columnar crystal particles is larger than that of the upper-layer columnar crystal particles. The apparatus preferable for vapor deposition of the magnetic layer has the constitution shown in the selected figure. Because the magnetic flux of the upper layer escapes to the lower layer, it is prevented that a closed loop of magnetic flux is formed in upper-layer columnar crystal particles. Also because the lower layer is magnetized, it contributes to improvement of reproduction output.

公开(公告)号：WO1982004158A1

公开(公告)日：1982-11-25

申请号：PCT/JP1982000185

申请日：1982-05-21

Applicant: SONY CORP ,  KAWANA TAKAHIRO ,  YOKOYAMA NORIO

Inventor： SONY CORP

IPC: G11B05/66

CPC classification number: G11B5/66 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/31678

Abstract: Un support d'enregistrement magnetique comprend un support non magnetique (1) sur lequel a ete deposee une couche metallique magnetique (4). Une couche metallique (2) dont au moins la surface a ete oxydee, nitruree ou carbonisee est formee sur une surface (1A) du support non-magnetique (1), et la couche metallique magnetique (4) est formee au-dessus de cette couche. Ce support d'enregistrement magnetique presente une duree accrue de la couche metallique magnetique (4).

公开(公告)号：WO1998032128A1

公开(公告)日：1998-07-23

申请号：PCT/US1997016512

申请日：1997-09-17

Applicant: SEAGATE TECHNOLOGY, INC. ,  SONG, Xing ,  CHEN, Ga-Lane ,  LEU, Charles ,  CHEN, Qixu

Inventor： SEAGATE TECHNOLOGY, INC.

IPC: G11B05/66

CPC classification number: G11B5/7325 ,  C23C14/024 ,  C23C14/185 ,  C23C14/568 ,  G11B5/8404 ,  Y02T50/67 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12896 ,  Y10T428/12903 ,  Y10T428/24355 ,  Y10T428/265 ,  Y10T428/30 ,  Y10T428/31678

Abstract: Reproducible texturing of magnetic recording media is enhanced by sputtering a buffer layer (51), such as Ni-P, on a nonmagnetic substrate (50), prior to sputtering a textured bump layer (52). A magnetic recording medium comprising a sputter textured metal layer (54) and high coercivity is achieved by employing an underlayer (53), such as NiAl or FeAl, preferably a composite underlayer containing a chromium or chromium-alloy layer and a NiAl layer the sputter textured layer. Advantageously the buffer layer (51), underlayer (53), textured bump layer (52), magnetic layer (54) and carbon overcoat (55) can be sputter deposited in a single apparatus.

Abstract translation: 在溅射形成纹理的凸起层（52）之前，通过在非磁性衬底（50）上溅射诸如Ni-P的缓冲层（51）来增强磁记录介质的再现纹理。 包括溅射纹理金属层（54）和高矫顽力的磁记录介质通过使用诸如NiAl或FeAl的底层（53），优选地包含含有铬或铬合金层和NiAl层的复合底层来实现溅射 纹理层。 有利地，缓冲层（51），底层（53），织构化凸块层（52），磁性层（54）和碳外涂层（55）可以溅射沉积在单个装置中。