公开(公告)号：EP1187105A3

公开(公告)日：2007-07-11

申请号：EP01120730.5

申请日：2001-09-05

申请人： FUJIFILM Corporation

发明人： Aoki, Masashi

IPC分类号： G11B5/82 ,  G11B5/86 ,  G11B5/596

CPC分类号： G11B5/865 ,  G11B5/59644 ,  G11B5/84 ,  Y10S83/948 ,  Y10T29/49027 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49036 ,  Y10T29/49048 ,  Y10T29/49073 ,  Y10T83/9423 ,  Y10T83/9425 ,  Y10T83/9428

摘要： A method of manufacturing a magnetic recording medium having a disc-shaped flexible slave medium accommodated in a case, onto which servo signals are effectively recorded by a magnetic transfer method with high quality. The method includes a slitting step for cutting an original sheet into discrete webs; a punching step for obtaining a disc-shaped slave medium; a thermo step for removing distortion; a burnishing step for smoothing a surface of the slave medium; a center core attachment step; a magnetic transfer step for performing a magnetic transfer while a master medium is allowed to be brought into close contact with one of the web and the slave medium; an assembly step for incorporating slave medium into the case; a cleaning step for cleaning a surface of the slave medium; a verifying step for checking the servo signals; and a packing step.

公开(公告)号：EP1229521A3

公开(公告)日：2007-12-05

申请号：EP02001946.9

申请日：2002-02-01

申请人： FUJIFILM Corporation

发明人： Aoki, Masashi ,  Komatsu, Kazunori ,  Nishikawa, Masakazu ,  Nakamikawa, Junichi

IPC分类号： G11B5/86 ,  G11B5/82 ,  G11B5/596

CPC分类号： G11B5/865 ,  G11B5/59633 ,  G11B5/82

摘要： When a master medium and a slave medium are brought into close contact and a transfer magnetic field is applied thereto to perform magnetic transfer, the leakage magnetic field intensity of the transfer magnetic field is regulated to within a permissible range, making possible the transfer of an exact magnetic pattern. After a magnetic field is applied to the slave face in the track direction thereof to initially magnetize the slave medium in the track direction, the master medium (3) and the slave medium (2) are brought into close contact. When applying a transfer magnetic field (G) in the track direction (D) of the slave face to perform a magnetic transfer, the magnetic field intensity component (d) in the direction opposite that in which the transfer magnetic field is to be applied is regulated to less than or equal to 1/2 the magnetic coercive force Hcs of the slave medium over the entire slave surface.

摘要翻译： 当主介质和从属介质紧密接触并施加转印磁场以执行磁转印时，转印磁场的泄漏磁场强度被调节到允许范围内，使得转印 确切的磁性模式。 在磁道方向上将磁场施加到从属面以在磁道方向上初始磁化从属介质之后，使主介质（3）和从属介质（2）紧密接触。 当在从属面的轨道方向（D）上施加转移磁场（G）以执行磁转移时，与转移磁场将被施加的方向相反的方向上的磁场强度分量（d）是 在整个从表面上被调整为小于或等于从属介质的磁矫顽力Hcs的1/2。

公开(公告)号：EP1339046A3

公开(公告)日：2008-05-28

申请号：EP03004211.3

申请日：2003-02-25

申请人： FUJIFILM Corporation

发明人： Komatsu, Kazunori ,  Aoki, Masashi

IPC分类号： G11B5/86 ,  G11B5/596

CPC分类号： G11B5/865 ,  G11B5/59633

摘要： Information represented by a pattern of a magnetic layer formed on a master information carrier (3) is magnetically transferred to a slave (2). An initial DC magnetic field (Hin) is applied to the slave medium with the slave medium supported from one side thereof so that the other side of the slave medium is directly opposed to the magnetic field generator (50), and a transfer magnetic field (Hdu) is applied to the slave medium and the master information carrier held in close contact with each other by a holder (8,9,10), which covers both the sides of the slave medium/master information carrier assembly, with the magnetic field generator (60,60a,60b) positioned to oppose both the sides of the slave medium/master information carrier assembly so that the magnetic field generated by the magnetic field generator is applied to the slave medium and the master information carrier through the holder.

公开(公告)号：EP1184846A3

公开(公告)日：2008-03-26

申请号：EP01118853.9

申请日：2001-08-14

申请人： FUJIFILM Corporation

发明人： Nishikawa, Masakazu ,  Usuki, Kazuyuki ,  Aoki, Masashi

IPC分类号： G11B5/86

CPC分类号： G11B5/865 ,  G11B23/505

摘要： A magnetic transfer method for magnetically transferring information signals such as servo signals from a master medium to a slave medium, capable of reducing a range of signal missing due to insufficient contact of the two mediums originating from an adhering substance, thus enhancing signal quality. When the master medium bearing an information signal and the slave medium are brought into close contact with each other, a transferring magnetic field is applied thereto, thus magnetically transferring the information signal from the master medium to the slave medium. An elastic member made of a material having an elastic property so as to deform in accordance with a surface shape of the slave medium during contact pressure application and to restore to an original surface shape thereof during release of the slave medium from the master medium can be interposed between a back of the slave medium and a pressing surface of a pressing support member.

公开(公告)号：EP1258866A3

公开(公告)日：2007-12-05

申请号：EP02010198.6

申请日：2002-05-15

申请人： FUJIFILM Corporation

发明人： Nishikawa, Masakazu ,  Aoki, Masashi

IPC分类号： G11B5/86 ,  G11B5/82 ,  G11B5/596

CPC分类号： G11B5/865 ,  G11B5/59633 ,  G11B5/82

摘要： Signal omissions are prevented from occurring in the magnetic data transferred to a slave medium (2) by magnetic transfer employing a magnetic transfer master medium. A master medium (3,4) formed of a material and having a thickness wherein the bow stiffness = Ebd 3 /12 thereof is in the range greater than or equal to 0.03 N · m 2 and less than or equal to 27 N · m 2 , for a sample piece thereof having a width defined of 1 m and an arbitrary lengthy and utilizing the Young's modulus E obtained by use of a vibration reed method on sample having a length of 50mm, an arbitrary width b, and a thickness d.

摘要翻译： 通过采用磁性传输主介质的磁传送，防止在传输到从属介质（2）的磁数据中发生信号遗漏。 由材料形成并且具有其中弓形刚度= Ebd3 / 12的厚度的主介质（3,4）在大于或等于0.03N·m2且小于或等于27N·m2的范围内， 其宽度限定为1μm且具有任意长度的样品片，并利用通过使用振动簧片方法获得的具有50mm长度，任意宽度b和厚度d的样品的杨氏模量E.