公开(公告)号：WO1997016826A1

公开(公告)日：1997-05-09

申请号：PCT/US1995014225

申请日：1995-11-03

Applicant: SEAGATE TECHNOLOGY, INC. ,  GAO, Chuan ,  MASSEY, Darrin

Inventor： SEAGATE TECHNOLOGY, INC.

IPC: G11B05/84

CPC classification number: G11B5/8404 ,  C23C14/541

Abstract: A process for fabricating a magnetic data storage medium includes formation of a controlled texture, either over an annular transducing head contact area or the entire surface of a substrate. The texture layer is formed by vacuum deposition of a texturing material onto a smooth surface of a non-magnetic substrate. The texturing material has a surface energy greater than that of the substrate, and the texturing material and substrate material have different linear coefficients of thermal expansion. Just before deposition of the texture layer, the substrate is heated to a temperature of 200 - 600 DEG C, then allowed to cool during texture layer deposition. The substrate and texture layer contract at different rates as they cool, inducing mechanical stresses within the texture layer sufficient to plastically deform the texture layer, creating multiple dome-like bumps. Subsequent thin film layers, including an underlayer, a magnetic recording layer and a protective cover layer, have uniform thicknesses and tend to replicate the texture layer topography. The resulting medium performs well under CSS testing at flying heights of less than 1.0 microinch, and exhibits excellent corrosive resistance when the substrate is formed of glass, glass ceramic or quartz. The process can be performed on all conventional types of substrates, including aluminum nickel-phosphorous substrates.

Abstract translation: 用于制造磁数据存储介质的方法包括在环形转换头接触区域或基底的整个表面上形成受控质地。 纹理层通过将纹理材料真空沉积到非磁性基底的光滑表面上而形成。 纹理材料的表面能大于衬底的表面能，并且纹理材料和衬底材料具有不同的线性热膨胀系数。 在沉积纹理层之前，将衬底加热到​​200-600℃的温度，然后在纹理层沉积期间冷却。 衬底和纹理层在冷却时以不同的速率收缩，导致纹理层内的机械应力足以使纹理层塑性变形，形成多个圆顶状凸起。 随后的薄膜层，包括底层，磁记录层和保护覆盖层，具有均匀的厚度，并且倾向于复制纹理层的形貌。 所得到的介质在飞行高度小于1.0微英寸的CSS测试下表现良好，并且当基底由玻璃，玻璃陶瓷或石英形成时，表现出优异的耐腐蚀性。 该方法可以在所有常规类型的基底上进行，包括铝镍磷基底。

公开(公告)号：WO1996034384A1

公开(公告)日：1996-10-31

申请号：PCT/US1996005677

申请日：1996-04-23

Applicant: HMT TECHNOLOGY CORPORATION

Inventor： HMT TECHNOLOGY CORPORATION ,  YANG, Ming, M. ,  CHAO, James, L. ,  LAL, Brij, B. ,  BOUREZ, Allen, J. ,  RUSSAK, Michael, A.

IPC: G11B05/84

CPC classification number: G11B5/8408 ,  G11B5/54 ,  G11B5/72 ,  G11B5/725 ,  G11B5/82 ,  G11B21/22

Abstract: A protective overcoat in a magnetic recording medium is described, where the overcoat extends between an inner-diameter landing zone and an outer-diameter data zone and has a thickness in the landing zone of at least 135 ANGSTROM and a thickness in the data zone of less than 90 ANGSTROM . Also described is a target assembly for use in forming the protective overcoat. The assembly includes a centrally positioned target with inner and outer magnetic means adjacent the target and a sputtering shield positioned between the target and the medium to control the amount and angle of material deposition on the medium.

Abstract translation: 描述了磁记录介质中的保护外涂层，其中外涂层在内径着陆区域和外径数据区域之间延伸，并且着陆区域中的厚度至少为135安培，数据区域中的厚度为 小于90 ANGSTROM。 还描述了用于形成保护性外涂层的目标组件。 该组件包括中心定位的靶，其具有邻近靶的内部和外部磁性装置以及位于靶和介质之间的溅射屏蔽，以控制介质上材料沉积的量和角度。

公开(公告)号：WO1996008817A1

公开(公告)日：1996-03-21

申请号：PCT/US1994013716

申请日：1994-11-28

Applicant: MATERIALS RESEARCH CORPORATION

Inventor： MATERIALS RESEARCH CORPORATION ,  ALEX, Michael

IPC: G11B05/84

CPC classification number: C23C14/34 ,  G11B5/7325 ,  G11B5/8404 ,  G11B5/851

Abstract: A method for selectively choosing the magnetic properties of a sputter deposited recording layer of a magnetic recording medium comprises sputtering a target (43) of metal underlayer material onto a substrate (10) to deposit an underlayer film (14) and selectively collimating the sputtered underlayer particles to vary the arrival energy and angular distribution of the sputter particles striking the substrate to selectively establish the orientation of the crystals making up the underlayer film. A magnetic metal film (16) is then sputter deposited upon the underlayer film to form a magnetic recording layer, having a crystal texture and recording properties affected by the orientation of the crystals in the underlayer film. The magnetic properties of the magnetic recording layer are chosen by selectively collimating while sputter depositing the underlayer material. The magnetic metal recording film may be selectively collimated instead of or in addition to the underlayer film.

Abstract translation: 用于选择性地选择磁记录介质的溅射沉积记录层的磁特性的方法包括将金属底层材料的靶（43）溅射到衬底（10）上以沉积下层膜（14）并选择性地准直溅射的底层 颗粒以改变溅射颗粒到达衬底的到达能量和角度分布，以选择性地建立构成下层膜的晶体的取向。 然后将磁性金属膜（16）溅射沉积在下层膜上以形成具有受下层膜中的晶体取向影响的晶体结构和记录性能的磁记录层。 通过选择性地准直来选择磁记录层的磁特性，同时溅射沉积底层材料。 磁性金属记录膜可以选择性地准直，而不是下层膜。

公开(公告)号：WO1995015556A1

公开(公告)日：1995-06-08

申请号：PCT/JP1994002014

申请日：1994-11-30

Applicant: TDK CORPORATION

Inventor： TDK CORPORATION ,  KUROSE, Shigeo ,  HONJO, Yoshihiro ,  SOMIYA, Akira

IPC: G11B05/84

CPC classification number: G11B5/735 ,  G11B5/84 ,  G11B5/842

Abstract: The first object of the present invention is to provide a magnetic recording medium which has fewer dropouts immediately after production, prevents dropouts from increasing with time, prevents the deterioration in electro-magnetic conversion properties, and has high-durability coating such as a magnetic layer. The second object of the present invention is to provide a magnetic recording medium which has high-durability back-coat layer and has high charge prevention effect by the back-coat layer in addition to the features of the first object. The third object of the present invention is to improve productivity and to reduce the cost of production when such a magnetic recording medium is produced. In a production method including a step of kneading a solid content and a binder solution, a step of suspending solid material in the kneaded product, and a step of adding a viscosity adjustment solution to the dispersion to obtain a coating material, wherein materials (binder solution, kneaded material, dispersion, viscosity adjustment agent, coating material) are filtered after each process step described above, and filtration means capable of removing 95 % of a predetermined range is used at each filtration step.

Abstract translation: 本发明的第一个目的是提供一种磁性记录介质，其在生产之后立即具有较少的压差，防止掉落随时间增加，防止电磁转换性能的劣化，并且具有高耐久性涂层如磁性层 。 本发明的第二个目的是提供一种具有高耐久性背涂层并且除了第一物体的特征之外还通过背涂层具有高电荷防止效果的磁记录介质。 本发明的第三个目的是提高生产率并降低制造这种磁记录介质时的生产成本。 在包括捏合固体含量和粘合剂溶液的步骤的制备方法中，将固体材料悬浮在捏合产物中的步骤和向分散体中加入粘度调节溶液以获得涂料的步骤，其中材料（粘合剂 溶液，捏合材料，分散体，粘度调节剂，涂料）在每个过程步骤后使用能够除去95％的预定范围的过滤装置。

公开(公告)号：WO1992018977A1

公开(公告)日：1992-10-29

申请号：PCT/GB1992000749

申请日：1992-04-23

Applicant: GEC AVERY LIMITED ,  JARVIS, Charles, Richard ,  SILVESTER, David, John

Inventor： GEC AVERY LIMITED

IPC: G11B05/84

CPC classification number: G11B5/716 ,  G11B5/84 ,  G11B5/855

Abstract: A magnetic data card comprises a data region bearing a magnetic recording material whose thickness along the axis varies in accordance with a predetermined pattern which provides a magnetic watermark underlying the recorded data, which can be used to verify the authenticity of the card. The variable thickness is achieved by printing a first layer (3) of magnetic recording material directly onto a substrate (1), a second layer (4) in a discontinuous pattern onto the first layer (3) and a third layer (6) in a different discontinuous pattern onto the second layer (4).

公开(公告)号：WO1991001035A1

公开(公告)日：1991-01-24

申请号：PCT/EP1990001103

申请日：1990-07-07

IPC: G11B05/84

CPC classification number: G11B5/8404

Abstract: The invention relates to a process for treating the surface of a substrate of an aluminium-magnesium alloy to obtain the planest possible surface; to this end it is proposed that the substrate be first subjected to a lapping process followed by turning; the lapping process is preferably performed in two stages in which the substrates are lapped under light pressure in the first and heavier pressure in the second (main) lapping stage.

公开(公告)号：WO1982004343A1

公开(公告)日：1982-12-09

申请号：PCT/JP1982000209

申请日：1982-05-28

Applicant: SONY CORP ,  TAKEI YUTAKA ,  SOMEZAWA MASASHI

Inventor： SONY CORP

IPC: G11B05/84

CPC classification number: G11B5/845 ,  B29C55/00

Abstract: Procede de fabrication d'un support d'enregistrement magnetique comprenant les etapes consistant a former une bande magnetique (2) en recouvrant un support non magnetique d'un liant et d'une peinture magnetique se composant principalement d'une poudre magnetique aciculaire, en appliquant un champ magnetique a courant continu a la bande magnetique dans une direction predeterminee au moyen d'un aimant a solenoide supraconducteur (1) pourvu d'une fente (3) au travers du centre, au travers de laquelle passe la bande magnetique de maniere que la poudre magnetique peut se deplacer pour etre orientee dans une direction predeterminee, ainsi qu'une etape de sechage. La bande magnetique ainsi fabriquee possede une densite de flux residuel amelioree d'environ 10 a 20% par rapport aux bandes conventionnelles et presente une sensibilite et un signal de sortie nettement meilleurs. Etant donne qu'un courant permanent s'ecoule au travers d'un supraconducteur possedant une resistance electrique sensiblement egale a 0, aucune perte de puissance a cause de l'echauffement ne se verifie, ce qui permet de reduire considerablement les frais de production entraines par un refroidisseur ou analogue.

公开(公告)号：EP0186356A3

公开(公告)日：1988-07-13

申请号：EP85308899

申请日：1985-12-06

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

Inventor： Skorjanec, Joseph Minnesota Mining and ,  Moe, Carmen D. c/o Minnesota Mining and

IPC: G11B05/706 ,  G11B05/72 ,  G11B05/84

CPC classification number: G11B5/64 ,  G11B5/725 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12931 ,  Y10T428/3154 ,  Y10T428/31544

Abstract: A metallic, thin film, magnetic recording medium is disclosed wherein the surface of the metallic thin film is modified such as to promote improved adhesion with protective lubricant. A process is disclosed wherein, for example, controlled oxidation of a metallic, thin film magnetic recording medium yields a homogeneous distribution of bonding sites and wherein application of a protective lubricant (e.g., perfluoropolyether compositions) provides a recording medium exhibiting superior wear and abrasion resistance.

公开(公告)号：EP0164727A3

公开(公告)日：1988-06-01

申请号：EP85107193

申请日：1985-06-11

Applicant: SUMITOMO BAKELITE COMPANY LIMITED

Inventor： Nakayama, Syoichi ,  Inui, Keita ,  Suzuki, Setsuo

IPC: G11B05/62 ,  G11B05/84 ,  G11B07/24 ,  G11B07/26

CPC classification number: G11B5/7305 ,  G11B5/84 ,  G11B7/252 ,  G11B7/2531 ,  G11B7/2532 ,  G11B7/2533 ,  G11B7/2542 ,  G11B7/2578 ,  G11B7/2585 ,  G11B7/26 ,  G11B2007/24304 ,  G11B2007/24316 ,  G11B2007/24324 ,  G11B2007/24328 ,  Y10S428/90 ,  Y10S430/146 ,  Y10T428/24967 ,  Y10T428/249921 ,  Y10T428/31515 ,  Y10T428/31522 ,  Y10T428/31529 ,  Y10T428/31551 ,  Y10T428/31562 ,  Y10T428/31605 ,  Y10T428/31681

Abstract: A composite substrate plate for a magnetic or optical disk, comprising a metal plate, an undercoat resin layer formed on one side or both sides of said metal plate, and a surface resin layer having a mirrorlike surface formed on said undercoat resin layer. Such a composite substrate plate is obtained by placing a liquid resin for forming the surface resin layer on the undercoat resin layer formed on one side or both sides of said metal plate or, alternatively, on one or two mirror-finished surfaces of molding plates for imparting a mirrorlike surface to said surface resin layer, then assembling the metal plate and the one or two molding plates so that one side or both sides of said metal plate carrying the undercoat resin layer and the liquid resin may be brought into contact with the one or two clean mirrorlike surfaces of molding plates or, alternatively, one side or both sides of said metal plate carrying the undercoat resin layer and no liquid resin may be brought into contact with the one or two liquid resin-bearing surfaces of molding plates, subsequently allowing the liquid resin to cure, and removing the one or two mirror-finished molding plates.

公开(公告)号：EP0207391A3

公开(公告)日：1988-04-20

申请号：EP86108402

申请日：1986-06-19

Applicant: BASF Aktiengesellschaft

Inventor： Grau, Werner, Dr. ,  Kohl, Albert ,  Kovacs, Jenoe, Dr. ,  Balz, Werner, Dr. ,  Münzner, Wulf, Dr.

IPC: G11B05/84

CPC classification number: G11B5/7085 ,  G11B5/72 ,  Y10S428/90