公开(公告)号：WO1990013115A1

公开(公告)日：1990-11-01

申请号：PCT/JP1990000547

申请日：1990-04-26

Applicant: NIPPON SHEET GLASS CO., LTD. ,  SONO, Kenzou ,  OKUDA, Eiji ,  OIKAWA, Masahiro ,  KAWAKITA, Shinya

Inventor： NIPPON SHEET GLASS CO., LTD.

IPC: G11B05/84

CPC classification number: G11B5/8404

Abstract: A method of producing substrates for magnetic disks wherein fine ruggedness is formed on the surface of a glass substrate by etching using a molten salt that contains a nitrite. The obtained magnetic disk exhibits mechanical and magnetic characteristics that are deteriorated little even when used for a long period of time.

公开(公告)号：WO1988001782A1

公开(公告)日：1988-03-10

申请号：PCT/US1987001976

申请日：1987-08-14

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  JAGANNATHAN, Ramesh ,  BYE, Matthew, Roy

IPC: G11B05/84

CPC classification number: G11B5/858 ,  G11B5/84

Abstract: A magnetic recording medium is fabricated by the electrodeposition of acicular magnetic particles onto an electrically conductive substrate from a mixture that is continuously dispersed and circulated through the electrodeposition vessel. Electrodeposition is effected at a critical electric field strength so that the particles are aligned in solution, and deposited perpendicular to the substrate surface such that the medium is highly densified. By use of anisotropic particles the resultant medium is adaptable for perpendicular recording, and by use of isotropic particles the resultant medium will support both longitudinal and perpendicular recording. The present invention also teaches electrodeposition of media whose particulate packing density varies in accordance with an areally predetermined pattern. The pattern is incised in one electrode of the deposition apparatus, and the medium as deposited on the other electrode mirrors the pattern as a varying particulate packing density. The packing density varies with the electric field intensity, and the electric field varies due to the unequal interelectrode distances arising from the incisions in the electrode. The medium is then d.c. magnetized, and the density variation provides a magnetically reproducible signal in accordance with the pattern.

Abstract translation: 磁性记录介质是通过从连续分散和循环通过电沉积容器的混合物将针状磁性颗粒电沉积到导电基底上制造的。 电沉积以临界电场强度进行，使得颗粒在溶液中排列，并垂直于基板表面沉积，使得介质被高度致密化。 通过使用各向异性颗粒，所得到的介质适用于垂直记录，并且通过使用各向同性的颗粒，所得介质将支持纵向和垂直记录。 本发明还教导了其颗粒填充密度根据预定图案而变化的介质的电沉积。 在沉积设备的一个电极中切割图案，并且沉积在另一个电极上的介质作为变化的颗粒填充密度反映图案。 堆积密度随着电场强度而变化，并且电场由于电极中的切口产生的电极间距离不等而变化。 培养基然后是d.c. 磁化，并且密度变化根据图案提供磁性可再现的信号。

公开(公告)号：WO1998019301A1

公开(公告)日：1998-05-07

申请号：PCT/US1997019710

申请日：1997-10-28

Applicant: HMT TECHNOLOGY CORPORATION

Inventor： HMT TECHNOLOGY CORPORATION ,  HOSÉ, John, S.

IPC: G11B05/84

CPC classification number: B24B37/08 ,  B24B7/17 ,  B24B7/22 ,  B24B41/007 ,  B24B41/04 ,  G11B5/8404

Abstract: An apparatus for polishing one or more planar substrates, such as magnetic disks, between rotating polishing plates is described. The apparatus is designed to optimize uniformity and flatness of the substrates by maintaining a substantially constant parallel and coaxial alignment between the rotating polishing plates.

Abstract translation: 描述了用于在旋转的抛光板之间抛光一个或多个平面基板（例如磁盘）的装置。 该设备被设计成通过保持旋转的抛光板之间基本上恒定的平行和同轴对准来优化基板的均匀性和平坦度。

公开(公告)号：WO1997047001A1

公开(公告)日：1997-12-11

申请号：PCT/US1996009330

申请日：1996-06-05

Applicant: SEAGATE TECHNOLOGY, INC. ,  CHEN, Ga-Lane ,  XUAN, Jialuo, Jack

Inventor： SEAGATE TECHNOLOGY, INC.

IPC: G11B05/84

CPC classification number: G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

Abstract: A magnetic recording medium is provided with a textured surface comprising a landing zone, a data zone, and a transition zone having protrusions which gradually decrease in height and diameter in progressing from the landing zone to the data zone. The transition zone can be formed by laser texturing and controlling the peak power of a pulsed laser beam and/or rotating speed of the surface undergoing texturing.

Abstract translation: 磁记录介质设置有纹理表面，纹理表面包括着陆区，数据区和具有从着陆区到数据区的高度和直径逐渐降低的突起的过渡区。 可以通过激光纹理化和控制脉冲激光束的峰值功率和/或经历纹理化的表面的转速来形成过渡区域。

公开(公告)号：WO1997006529A1

公开(公告)日：1997-02-20

申请号：PCT/US1996012863

申请日：1996-08-06

Applicant: HMT TECHNOLOGY CORPORATION

Inventor： HMT TECHNOLOGY CORPORATION ,  LAL, Brij, Bihari ,  BOUREZ, Allen, J. ,  RUSSAK, Michael, A.

IPC: G11B05/84

CPC classification number: G11B5/8408 ,  G11B5/72

Abstract: A method for forming an overcoat having first and second layers in a magnetic recording medium is described. The first overcoat layer is deposited in a first sputtering chamber where the magnetic means for confining target plasma in the chamber are oriented to retain magnetic field confinement about the target surface and to produce magnetic field lines between directly confronting portions of the confronting sputtering targets. The second overcoat layer is deposited under a nitrogen-containing atmosphere.

Abstract translation: 描述了在磁记录介质中形成具有第一和第二层的外涂层的方法。 第一外涂层沉积在第一溅射室中，其中用于限制室中的目标等离子体的磁性装置被取向为保持围绕目标表面的磁场约束并且在相对的溅射靶的直接面对部分之间产生磁场线。 第二外涂层在含氮气氛下沉积。

公开(公告)号：WO1996027189A1

公开(公告)日：1996-09-06

申请号：PCT/US1996001089

申请日：1996-01-26

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  OHISHI, Michihiro

IPC: G11B05/84

CPC classification number: G11B5/84 ,  B24D11/00 ,  G11B5/8404

Abstract: A method for texturing magnetic recording media substrates using a structured abrasive article including a flexible backing having a major surface and an abrasive coating, the abrasive coating attached to and at least substantially covering the entire total surface area of the major surface, where the abrasive coating includes a plurality of precisely-shaped three-dimensional abrasive composites, and the composites comprise a plurality of abrasive particles dispersed in a binder, which binder provides the means of attachment of the composites to the backing.

Abstract translation: 一种用于使用结构化磨料制品对磁性记录介质基材进行纹理化的方法，所述结构化磨料制品包括具有主表面和磨料涂层的柔性背衬，所述磨料涂层附着并且至少基本上覆盖主表面的整个总表面积，其中磨料涂层 包括多个精确成形的三维磨料复合材料，并且复合材料包括分散在粘合剂中的多个磨料颗粒，该粘合剂提供了将复合材料附着到背衬上的方法。

公开(公告)号：WO1996027188A1

公开(公告)日：1996-09-06

申请号：PCT/JP1996000470

申请日：1996-02-28

Applicant: SONY CORPORATION ,  HONMA, Takumi ,  KONNO, Akihiko

Inventor： SONY CORPORATION

IPC: G11B05/84

CPC classification number: G11B5/84

Abstract: The invention relates to a surface polishing method and a surface polishing apparatus, in which a magnetic layer surface of a magnetic tape is polished by contacting the magnetic layer surface with an abrasive tape, which runs while being wound round a contact roll, and causing the magnetic tape and the abrasive tape in opposite directions in this state. In the invention, the contact roll has a radius of curvature of 0.1 to 10 mm in a location where the magnetic tape first contacts with the abrasive tape during surface polishing. To make the contact roll have a radius of curvature of 0.1 to 10 mm in a location where the magnetic tape first contacts with the abrasive tape as described above, the radius of curvature of the contact roll is changed continuously, for example. More specifically, in a cross section of the contact roll, first and second curves having different radii of curvature are formed continuously from an entry side of the magnetic tape and a radius of curvature of the first curve is set to be smaller than that of the second curve. Alternatively, the contact roll is in the form of a composite cylindrical roll which has a shape of a combined larger-diameter roll and a small-diameter roll. Concretely, the contact roll is formed as a composite cylindrical roll having a cross-sectional shape, in which a large circle having a diameter of 10 to 100 mm and a small circle having a diameter of 0.2 to 20 mm partly overlap each other. The small circle portion is disposed such that the magnetic tape and the abrasive tape first contact there with each other. Further, a plurality (two or five) of contact rolls having a diameter of 0.2 to 20 mm are provided for contact with the abrasive tape.

Abstract translation: 本发明涉及一种表面抛光方法和表面抛光装置，其中通过使磁性层表面与研磨带接触来研磨磁带的磁性层表面，该研磨带在被接触辊缠绕的同时运行，并使 磁带和砂带在这种状态下相反。 在本发明中，在表面抛光期间磁带首先与砂带接触的位置处，接触辊具有0.1至10mm的曲率半径。 为了使接触辊在如上所述的磁带首先与研磨带接触的位置处具有0.1至10mm的曲率半径，例如接触辊的曲率半径连续变化。 更具体地，在接触辊的横截面中，从磁带的入口侧连续地形成具有不同曲率半径的第一和第二曲线，并且将第一曲线的曲率半径设定为小于 第二曲线。 或者，接触辊是复合圆柱形辊的形式，其具有组合的较大直径辊和小直径辊的形状。 具体地，接触辊形成为具有截面形状的复合圆柱形辊，其中直径为10至100mm的大圆和直径为0.2至20mm的小圆部分彼此重叠。 小圆形部分设置成使得磁带和砂带首先彼此接触。 此外，提供直径为0.2至20mm的多个（两个或五个）接触辊，用于与砂带接触。

公开(公告)号：WO1990004844A1

公开(公告)日：1990-05-03

申请号：PCT/FR1989000539

申请日：1989-10-17

Applicant: KODAK-PATHE ,  DELMAR, Jean-Claude

Inventor： KODAK-PATHE

IPC: G11B05/84

CPC classification number: B29C66/45 ,  B29C59/02 ,  B29C65/04 ,  B29C66/1122 ,  B29C66/71 ,  B29C66/73161 ,  B29C66/73921 ,  B29C66/8122 ,  B29C66/8322 ,  B29K2069/00 ,  B29K2909/08 ,  B29K2995/0072 ,  B29L2009/00 ,  B32B38/00 ,  B32B2038/0064 ,  B32B2307/208 ,  G11B5/84 ,  B29K2027/06

Abstract: Method for the surface treatment of a magnetic sheet comprising a support to which is applied a magnetic layer on at least one of its two sides. The method is characterized in that, in hot conditions, a pressure is applied to each of the magnetic layers by using the surface of polished glass. Application to the fabrication of high density magnetic cards.

公开(公告)号：WO1989002149A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002996

申请日：1988-08-31

Applicant: DIGITAL EQUIPMENT CORPORATION

Inventor： DIGITAL EQUIPMENT CORPORATION ,  RAUCH, Gary, C. ,  YOUNG, David, J. ,  JOHNS, Earl, R., C. ,  STONE, Robert, L. ,  MESSINGER, Carolyn, A.

IPC: G11B05/84

CPC classification number: G11B5/858 ,  G11B5/84 ,  Y10S205/922

Abstract: This invention comprises the use, during the plating processing of thin-film magnetic recording media, of an oxidizing treatment immediately preceding the electroplating of the magnetic layer. This oxidizing treatment can be controlled to produce desired high levels of coercive force and low levels of media noise.

公开(公告)号：WO1998037553A1

公开(公告)日：1998-08-27

申请号：PCT/RU1997000397

申请日：1997-12-05

Applicant: YALESTOWN CORPORATION N.V. ,  ZHARIKOV, Valery Mokhailovich

Inventor： YALESTOWN CORPORATION N.V.

IPC: G11B05/84

CPC classification number: G11B5/8408 ,  G11B5/84

Abstract: The present invention relates to the production of magnetic recording media. The inventive method consists mainly in applying a coarsed-grained magnetic coating onto a base and converting its near-surface layer into a close-grained magnetic layer by exposing sections of the coarsed-grained coating to a nanosecond pulsed layer radiation meeting certain parameters.

Abstract translation: 本发明涉及磁记录介质的制造。 本发明的方法主要在于将粗糙度的磁性涂层施加到基底上并将其近表面层转化成细粒度的磁性层，将粗糙度的涂层的部分暴露于符合某些参数的纳秒脉冲层辐射。