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 and the slave medium are brought into close contact. When applying a transfer magnetic field in the track direction of the slave face to perform a magnetic transfer, the magnetic field intensity component in the direction opposite that in which the transfer magnetic field is to be applied is regulated to less than or equal to ½ the magnetic coercive force Hcs of the slave medium over the entire slave surface.
摘要:
A magnetic pattern, in which errors due to sub-pulses do not occur during signal reproduction, is transferred from a magnetic transfer master carrier. A magnetic field is applied to a conjoined body, formed by the master carrier bearing a transfer pattern corresponding to desired information and a discoid transfer medium. A magnetic transfer apparatus that includes magnetic field applying means having magnetic poles that extend from the interior to the outer periphery of the conjoined body, and rotating means for relatively rotating the conjoined body with respect to the magnetic poles is employed. The magnetic poles are provided such that a distance d, between end surfaces of the magnetic poles and the conjoined body decrease from the interior to the outer periphery of the conjoined body. Magnetic transfer is performed employing the magnetic field, the intensity of which increases from the interior to the outer periphery of the transfer medium.
摘要:
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and slave medium is in confronted close contact and received within a holder, inferiority of transfer such as omission of signals is prevented and quality of transfer signals is enhanced. The magnetic transfer apparatus executes magnetic transfer by applying transfer magnetic field by means of a magnetic field applying apparatus 5 after a master carrier 3, 4 bearing transfer information and a slave medium 2 to be transferred are brought into confronted close contact and received within a holder 10, wherein said holder 10 has a substantially circular shape and in particular, the circularity of holder is not less than 98%, wherein the flexural rigidity=Ed3/12 determined by Young's modulus E and thickness d of the holder is in the range of 0.1˜30 kN·m2 when the width of close contact area between the slave medium and master carrier is defined as 1 m, and wherein the practical thickness of the holder is not less than 3 mm and not more than 15 mm.
摘要翻译:通过在主载体和从属介质紧密接触并接收在载体内的状态下,通过施加传递磁场来使主载体和从属介质与均匀的力紧密接触,从而传递的传递如 防止信号的省略,并且提高传输信号的质量。 磁传送装置通过在主载体3,4之间施加转移磁场来执行磁转移,主载体3,4之间的轴承转移信息和待传送的从属介质2被紧密接触并接收在保持器内 如图10所示,其中所述保持器10具有大致圆形形状,特别地,保持器的圆形度不小于98%,其中由杨氏模量E和厚度d确定的弯曲刚度= Ed 3/12 当从属介质和主载体之间的紧密接触面积的宽度被定义为1m时,保持器的范围在0.1〜30kN.m 2范围内,并且其中保持器的实际厚度 不小于3mm且不大于15mm。
摘要:
A favorable magnetic transfer is, performed on a perpendicular magnetic recording medium. A permanent magnet apparatus provided with two permanent magnets, each having a width extending the length of the radial direction of a discoid magnetic recording medium, is used as a transfer magnetic field generating means. A conjoined body formed of the perpendicular magnetic recording medium, which has been initially magnetized unidirectionally in the direction perpendicular to the track surface thereof, and two master mediums, disposed on respective surfaces of the slave medium, is inserted between the permanent magnets. A rotating means rotates the conjoined body, in the direction along the tracks of the slave medium, while a transfer magnetic field is applied to the conjoined body in the direction substantially opposite that in which the initial magnetization of the magnetic layer of magnetic recording medium has been performed, so as to perform the magnetic transfer.
摘要:
A favorable magnetic transfer is, performed on a perpendicular magnetic recording medium. A permanent magnet apparatus provided with two permanent magnets, each having a width extending the length of the radial direction of a discoid magnetic recording medium, is used as a transfer magnetic field generating means. A conjoined body formed of the perpendicular magnetic recording medium, which has been initially magnetized unidirectionally in the direction perpendicular to the track surface thereof, and two master mediums, disposed on respective surfaces of the slave medium, is inserted between the permanent magnets. A rotating means rotates the conjoined body, in the direction along the tracks of the slave medium, while a transfer magnetic field is applied to the conjoined body in the direction substantially opposite that in which the initial magnetization of the magnetic layer of magnetic recording medium has been performed, so as to perform the magnetic transfer.
摘要:
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and slave medium is in confronted close contact and received within a holder, inferiority of transfer such as omission of signals is prevented and quality of transfer signals is enhanced. The magnetic transfer apparatus executes magnetic transfer by applying transfer magnetic field by means of a magnetic field applying apparatus 5 after a master carrier 3, 4 bearing transfer information and a slave medium 2 to be transferred are brought into confronted close contact and received within a holder 10, wherein said holder 10 has a substantially circular shape and in particular, the circularity of holder is not less than 98%, wherein the flexural rigidity=Ed3/12 determined by Young's modulus E and thickness d of the holder is in the range of 0.1˜30 kN·m2 when the width of close contact area between the slave medium and master carrier is defined as 1 m, and wherein the practical thickness of the holder is not less than 3 mm and not more than 15 mm.
摘要翻译:通过在主载体和从属介质紧密接触并接收在载体内的状态下,通过施加传递磁场来使主载体和从属介质与均匀的力紧密接触,从而传递的传递如 防止信号的省略,并且提高传输信号的质量。 磁传送装置通过在主载体3,4之间施加转移磁场来执行磁转移,主载体3,4之间的轴承转移信息和待传送的从属介质2被紧密接触并接收在保持器内 如图10所示,其中所述保持器10具有大致圆形形状,特别地,保持器的圆形度不小于98%,其中由杨氏模量E和厚度d确定的弯曲刚度= Ed 3/12 当从属介质和主载体之间的紧密接触面积的宽度被定义为1m时,保持器的范围在0.1〜30kN.m 2范围内,并且其中保持器的实际厚度 不小于3mm且不大于15mm。
摘要:
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and slave medium is in confronted close contact and received within a holder, inferiority of transfer such as omission of signals is prevented and quality of transfer signals is enhanced.The magnetic transfer apparatus executes magnetic transfer by applying transfer magnetic field by means of a magnetic field applying apparatus 5 after a master carrier 3, 4 bearing transfer information and a slave medium 2 to be transferred are brought into confronted close contact and received within a holder 10, wherein said holder 10 has a substantially circular shape and in particular, the circularity of holder is not less than 98%, wherein the flexural rigidity=Ed3/12 determined by Young's modulus E and thickness d of the holder is in the range of 0.1˜30 kN·m2 when the width of close contact area between the slave medium and master carrier is defined as 1m, and wherein the practical thickness of the holder is not less than 3 mm and not more than 15 mm.
摘要翻译:通过在主载体和从属介质紧密接触并接收在载体内的状态下,通过施加传递磁场来使主载体和从属介质与均匀的力紧密接触,从而传递的传递如 防止信号的省略,并且提高传输信号的质量。 磁传送装置通过在主载体3,4之间施加转移磁场来执行磁转移,主载体3,4之间的轴承转移信息和待传送的从属介质2被紧密接触并接收在保持器内 如图10所示,其中所述保持器10具有大致圆形形状,特别地,保持器的圆形度不小于98%,其中由杨氏模量E和厚度d确定的弯曲刚度= Ed 3/12 当从属介质和主载体之间的紧密接触区域的宽度被定义为1m时,保持器的实际厚度在0.1〜30kN.m 2的范围内,并且其中保持器的实际厚度为 不小于3毫米不超过15毫米。
摘要:
The invention provides a method for performing magnetic transfer by bringing a master carrier for magnetic transfer and a slave medium in close contact with each other and by applying a magnetic field for transfer, whereby a product (Ms1&dgr;1) of saturation magnetization (Ms1) and film thickness (&dgr;1) of a magnetic layer of the master carrier to be used for magnetic transfer on a surface of the slave medium with earlier magnetic transfer and a product (Ms2&dgr;2) of saturation magnetization (Ms2) and film thickness (&dgr;2) of a magnetic layer of the master carrier are in a relation of: 1.5
摘要:
The foreign matter adhered to the data bearing surface of a master medium is removed by use of a dry, non-contact removal process, so as to facilitate the performance of a high transfer quality magnetic transfer. Before performing a magnetic transfer or forming an optical disk, a magnetic transfer master medium or an optical disk master medium is placed in a vacuum chamber. The vacuum chamber is evacuated by an evacuating means, and a reactive gas is introduced thereto by a gas introducing means. In the state in which the chamber has been evacuated and the reactive gas has been introduced thereto, a discharging means applies a discharge voltage in the chamber, causing a plasma discharge to be generated between the master medium and an electrode. The plasma etching action of the plasma discharge burns off the foreign matter adhered to the surface of the master medium.
摘要:
A favorable magnetic transfer is performed to a perpendicular magnetic recording medium. A master medium is provided with a substrate on the surface of which protrusion portions, which form a pattern corresponding to the data that is to be transferred, having a pliable layer thereon have been formed. The master medium is further provided with a soft magnetic layer formed in the depression portions between the protrusion portions, and which is magnetically linked to the soft magnetic layer of the protrusion portions. The soft magnetic layer of the surface of the protrusion portions is conjoined with the magnetic recording layer of a perpendicular magnetic recording medium to form a conjoined body, and a transfer magnetic field is applied to the conjoined body in the direction from the substrate of the master medium toward the slave medium to perform the magnetic transfer.