专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP0220597A3 Thin film vertical magnetic recording medium with a substrate, an intermediate layer and a magnetisable layer 失效
标题翻译：薄膜垂直磁记录介质与基板，中间层和可磁化层
公开(公告)号：EP0220597A3
公开(公告)日：1988-07-06
申请号：EP86114203
申请日：1986-10-14
申请人： International Business Machines Corporation
发明人： Howard, James Kent
IPC分类号： G11B05/64 , G11B05/66
CPC分类号： G11B5/7325 , G11B5/64 , Y10S428/928 , Y10T428/12465 , Y10T428/12812 , Y10T428/12854 , Y10T428/12931
摘要： The present invention relates to a magnetic recording medium for vertical recording of the type comprising a substrate (1), an intermediate layer (2) formed on the substrate and a magnetisable layer (3) formed on the intermediate layer. A medium according to the invention is characterised in that
the intermediate layer (2) comprises a first constituent of an element selected from the group consisting of tungsten (W), molybdenum (Mo), niobium (Nb), titanium (Ti), vanadium (V), iridium (Ir) and zirconium (Zr), and a second constituent consisting of either cobalt (Co), chromium (Cr), or a solid substitutional solution alloy of CoCr, wherein the amounts of the first and second constituents are present in a fixed stoichometric ratio so as to form an intermetallic compound with a hexagonal crystalline structure, and
the magnetisable layer (3) comprises a ternary alloy of the form (Co 100-y Cr y )X, wherein y is approximately in the range of 14 to 22 and wherein X is selected from the group consisting of W, Mo, Nb, Ti and V, and has an hexagonal crystalline structure with its C-axis oriented generally perpendicular to said substrate (1). The hexagonal cell constants of the intermediate layer (2) and the magnetisable layer (3) are related by approximately integral multiples whereby the hexagonal crystalline orientation of the magnetisable layer (3) is enhanced.

2. 发明公开

EP0158338A3 Perpendicular magnetic recording medium 失效
标题翻译：全能磁记录介质
公开(公告)号：EP0158338A3
公开(公告)日：1987-01-14
申请号：EP85104338
申请日：1985-04-10
申请人： HITACHI, LTD. , Hitachi Maxell Ltd.
发明人： Futamoto, Masaaki , Honda, Yukio , Uesaka, Yasutaro , Yoshida, Kazuetsu
IPC分类号： G11B05/66 , G11B05/64
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325 , Y10S428/90 , Y10T428/12465 , Y10T428/12674
摘要： Disclosed is a perpendicular magnetic recording medium wherein an under layer (2) made of a material containing Si and/or Ge as its principal ingredient is deposited on a substrate (1), and a perpendicular magnetic film (3) made of a Co-based alloy is deposited on the under layer. With the perpendicular magnetic recording medium, the perpendicular magnetic film has an enhanced degree of C-axis orientation, and the bond strength between the perpendicular magnetic film and the substrate is also enhanced when the substrate is non-metallic.

3. 发明公开

EP0089609A3 Magnetic recording medium and method of manufacturing a magnetic recording medium 失效
标题翻译：磁记录介质和制造磁记录介质的方法
公开(公告)号：EP0089609A3
公开(公告)日：1986-01-29
申请号：EP83102560
申请日：1983-03-15
申请人： Matsushita Electric Industrial Co., Ltd.
发明人： Sugita, Ryuji , Kanai, Kenji , Sasaki, Seishi , Takahashi, Ken
IPC分类号： G11B05/84 , G11B05/66 , H01F41/20 , H01F10/16
CPC分类号： H01F41/20 , G11B5/66 , G11B5/851
摘要： 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.

4. 发明公开

EP0174024A3 Magnetic recording medium and method of producing the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：EP0174024A3
公开(公告)日：1987-03-25
申请号：EP85111217
申请日：1985-09-05
申请人： Matsushita Electric Industrial Co., Ltd.
发明人： Kurokawa, Hideo , Mitani, Tsutomu , Yokoyama, Kazuo , Yonezawa, Taketoshi
IPC分类号： G11B05/66
CPC分类号： G11B5/72 , G11B5/84 , Y10S428/90 , Y10T428/265
摘要： @ A magnetic recording medium has a non-magnetic substrate, a magnetic layer formed on the surface of the substrate from a ferromagnetic material, and a protective film formed on the magnetic layer. The protective film is constituted by a singular layer of continuous or dispersed molecular structures in which carbon element and an element constituting the magnetic layer are bonded directly or indirectly through oxygen and at least one fluorine element is bonded to the carbon element. This magnetic recording medium can be produced by a method comprising preparing a substrate of a non-magnetic material, forming a magnetic layer of a ferromagnetic material on the surface of the substrate, and forming, by a plasma CVD method, a protective film of a fluorine-containing molecular body having a thickness not greater than a value equivalent to 5 A on the surface of the mag tic layer.

5. 发明公开

EP0145446A3 Vertical magnetic recording medium 失效
标题翻译：垂直磁记录介质
公开(公告)号：EP0145446A3
公开(公告)日：1986-12-17
申请号：EP84308447
申请日：1984-12-05
申请人： Matsushita Electric Industrial Co., Ltd.
发明人： Sugita, Ryuji , Honda, Kazuyoshi , Nishida, Hiroshi , Noda, Kyoji
IPC分类号： G11B05/66
CPC分类号： G11B5/66 , Y10S428/928 , Y10T428/12465 , Y10T428/12632 , Y10T428/12806 , Y10T428/12861 , Y10T428/12931 , Y10T428/12937
摘要： A vertical magnetic recording medium comprises a non-magnetic substrate (1, 12. 18). a permalloy film (4. 5, 13. 19) consisting of plural permalloy layers (6. 6', 14: 20a. 20b'. 24a, 24b. 24ci separated by at least one non-magnetic layer (7, 7', 15. 21. 23' 25.25') placed therein, each of said plurality of permalloy layers being 2000 A or less thick, and a Co-Cr vertical magnetization film (2. 22) formed on the permalloy film directly or through another non-magnetic layer (11.16).

6. 发明公开

EP0099564A3 Perpendicular magnetic recording medium and manufacturing method thereof 失效
标题翻译：全能磁记录介质及其制造方法
公开(公告)号：EP0099564A3
公开(公告)日：1986-01-15
申请号：EP83107031
申请日：1983-07-18
申请人： HITACHI, LTD. , Hitachi Maxell Ltd.
发明人： Uesaka, Yasutaro , Fujiwara, Hideo , Hishiyama, Sadao , Shiiki, Kazuo
IPC分类号： G11B05/66
CPC分类号： G11B5/66 , G11B2005/0029 , Y10S428/928 , Y10T428/12438 , Y10T428/12465 , Y10T428/12535 , Y10T428/12931 , Y10T428/12937 , Y10T428/12944 , Y10T428/12951
摘要： A perpendicular magnetic recording medium free from spike noise having a high permeability magnetic material film (2), an antiferromagnetic material film (6) and a perpendicularly oriented magnetic material film (3) formed on a substrate (1) in this order. Another high permeability magnetic material film (9) may be formed between the antiferromagnetic material film and the perpendicularly oriented magnetic material film. During the formation of the antiferromagnetic material film (6), a magnetic field is applied in a direction of a track width.

7. 发明公开

EP0190854A3 Method for producing a perpendicular magnetic recording medium 失效
标题翻译：一种用于生产全磁记录介质的全息磁记录方法
公开(公告)号：EP0190854A3
公开(公告)日：1988-07-20
申请号：EP86300514
申请日：1986-01-27
申请人： TORAY INDUSTRIES, INC.
发明人： Akamatsu, Takayoshi , Oka, Tethuo , Hayashi, Kenji
IPC分类号： G11B05/85 , H01F41/22 , G11B05/66
CPC分类号： G11B5/66 , G11B5/85
摘要： 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).
摘要翻译：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）。

8. 发明公开

EP0205239A3 Thin film magnetic disc 失效
标题翻译：薄膜磁性盘
公开(公告)号：EP0205239A3
公开(公告)日：1987-11-19
申请号：EP86302893
申请日：1986-04-17
申请人： AKASHIC MEMORIES CORPORATION
发明人： Scott, John C. , Li, Eric K. , Washburn, Hudson A. , Viswanathan, Nal T.
IPC分类号： G11B05/66 , G11B05/716
CPC分类号： G11B5/851 , G11B5/64
摘要： @ A new high quality, low cost, thin-film magnetic recording member is provided, which has a coercive field strength greater than 650 Oe, a saturation magnetization greater than 10,000 Gauss, and a squareness ratio of 0.9 or larger. The member includes a substrate on which is directly sputter deposited a chromium layer, without the use of an intervening nickel-containing layer between the substrate and the chromium. A nickel-cobalt recording layer is then sputter deposited directly onto the chromium layer. In the preferred mode, the start of that nickel-cobalt deposition begins less than 100 seconds after the chromium deposition is terminated and is followed by the sputtering of a protective layer. Before the chromium deposition, the substrate is preheated to drive off adsorbed gases, and to establish the proper conditions forthe chromium deposition. The substrate is also heated during the time between when the chromium deposition ends and the nickel-cobalt deposition begins.

9. 发明公开

EP0145026A3 Film type multilayer magnetic recording medium and method of manufacturing the medium 失效
标题翻译：薄膜型多层磁记录介质及其制造方法
公开(公告)号：EP0145026A3
公开(公告)日：1986-02-05
申请号：EP84115484
申请日：1984-12-14
申请人： Saiteku Corporation
发明人： Takahashi, Yasunori
IPC分类号： G11B05/716 , G11B05/66 , G11B05/845 , G11B05/714
CPC分类号： G11B5/716 , G11B5/66 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： A film type multilayer magnetic recording medium comprised of a film applied to a substratum in which coating film needle-shaped magnetic grains are orientated with their longitudinal axes perpendicular to the film surface in a multilayer state and having a film thickness of 1.1 to 2.0 times the average length of the grains, has an excellent property, because the angular ratio (Br Bs) of both horizontal and vertical components respectively are 0.6 or more. As a result, it is possible to attain a high density recording. The film type multilayer magnetic recording medium of the present inventions is manufactured by applying a fluid film forming material, in which neddle-shaped magnetic grains are dispersed to form a coating film having the thickness of 1.1 to 2.0 times the average length of the magnetic grains on a substratum, and then drying or hardening the film forming material in a magnetic field orientated perpendicularly toward the film surface.

10. 发明公开

EP0077069A3 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：EP0077069A3
公开(公告)日：1985-05-02
申请号：EP82109425
申请日：1982-10-12
申请人： Hitachi Maxell Ltd.
发明人： Karashima, Takato View Heights Room No. 502 , Zaitsu, Hiroshi
IPC分类号： G11B05/70 , G11B05/66
CPC分类号： G11B5/716 , G11B5/66 , Y10S428/90 , Y10T428/24942
摘要： A magnetic recording medium having two magnetic layers, which comprises an upper magnetic layer and a lower magnetic layer, said lower magnetic layer having a coercive force of at least 100 oersteds, preferably 100 to 500 oersteds, lower than that of the upper magnetic layer, the thickness of the upper and lower magnetic layers being in the ratio of the thickness of the upper magnetic layer to that of the lower magnetic layer of 1/1 to 1/9, and the total coercive force of the upper and lower magnetic layers being 1,000 oersteds or more. The magnetic recording medium has excellent sensitivity and frequency characteristics at low and high frequency bands with less noise.
摘要翻译： 1，一种具有两层磁性层的磁记录介质，它包括一上磁层和一下磁层，所述下磁层的矫顽力至少为100奥斯特，最好为100至500奥斯特，低于上磁层的矫顽力，上和下磁层的厚度是上磁层和下磁层的厚度之比为1/1到1/9，并且上和下磁层的总矫顽力是 1000奥斯特或更多。磁记录介质在低频和高频段具有优异的灵敏度和频率特性，噪声较小。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式