Magnetic recording medium, method for initializing magnetic recording medium, method for transferring signal to magnetic recording medium, apparatus for processing signal of magnetic recording medium

A magnetic recording medium and initialization technology, applied in magnetic recording, recording information storage, data recording, etc., can solve the problems of difficult initialization and time-consuming

Inactive Publication Date: 2004-01-14
TOSHIBA STORAGE DEVICE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] As mentioned above, the problem with traditional med

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  • Magnetic recording medium, method for initializing magnetic recording medium, method for transferring signal to magnetic recording medium, apparatus for processing signal of magnetic recording medium
  • Magnetic recording medium, method for initializing magnetic recording medium, method for transferring signal to magnetic recording medium, apparatus for processing signal of magnetic recording medium
  • Magnetic recording medium, method for initializing magnetic recording medium, method for transferring signal to magnetic recording medium, apparatus for processing signal of magnetic recording medium

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no. 1 example

[0040] Figure 3A and 3B The method and magnetization state of the initialization medium of the present invention are shown. Figure 3A shows the magnetization state of the initialized medium, Figure 3B The state of magnetization of the medium in which the signal is recorded is shown. exist Figure 3A and 3B Among them, the medium 1 is composed of a substrate 10 , a first magnetic film 11 and a second magnetic film 12 . The substrate 10 is composed of a non-magnetic material such as that used in the related art, and has a flat surface. The substrate 10 has a thickness of 100 μm to 1 mm. A first magnetic film 11 is formed on a first surface of the substrate 10 by a conventional film forming method, and a second magnetic film 12 is formed on a second surface of the substrate 10 opposite the first surface. The first magnetic thin film 11 and the second magnetic thin film 12 are composed of a magnetic material such as those used in the related art, and have a thickness of,...

no. 2 example

[0044] Figure 4 A method of initializing a medium of the present invention is shown. A plurality of media 1 are stacked between the N pole portion NP and the S pole portion SP, wherein each media 1 is composed of a substrate 10 , a first magnetic thin film 11 and a second magnetic thin film 12 . Next, an initialization magnetic field Hi is applied as an external magnetic field in the substrate-vertical direction (stacking direction) of the substrate 10 to perform initialization. By this method, a plurality of stacked media 1 can be simultaneously initialized, and moreover, states of initialization magnetizations (H1i and H2i) of the respective media 1 can be unified with high precision. Thus, a remarkably efficient initialization of the medium 1 can be achieved. Here, since the respective media are initialized such that the direction of the initialization magnetization H1i of the first magnetic film 11 and the direction of the initialization magnetization H2i of the second ...

no. 3 example

[0046] Figures 5A-5C A method of transmitting a signal to a medium of the present invention is shown. Figure 5A shows the magnetization state of the initialized medium, Figure 5B shows the state of magnetization when transmitting a signal from the host medium, while Figure 5C The state of magnetization of the medium after signal transmission is shown.

[0047] Figure 5A The state of magnetization of the medium 1, which has been initialized by the method described in the first embodiment, is shown. The initialization magnetization H1i is formed on the first magnetic film 11 along the vertical direction of the substrate 10 , and the initialization magnetization H2i is formed on the second magnetic film 12 along the vertical direction of the substrate 10 . As described above, the direction of the initialization magnetization H1i and the direction of the initialization magnetization H2i coincide with each other. It should be noted that when a plurality of media 1 are ini...

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Abstract

An initialization magnetic field (Hi) as an external magnetic field is applied in a direction crossing (perpendicularly) the surface of the substrate 10 to initialize the medium 1, so that the first magnetic film 11 and the second magnetic film 12 can be initialized simultaneously. In this method for initializing a medium, the magnetization direction of the initialization magnetization H1i at the first magnetic film 11 and the magnetization direction of the initialization magnetization H2i at the second magnetic film 12 accord with each other with regard to a direction crossing the substrate 10.

Description

technical field [0001] The present invention relates to a method of initializing a magnetic recording medium, a method of transmitting a signal to a magnetic recording medium, an apparatus for processing a signal of a magnetic recording medium, and a double-sided perpendicular magnetic recording medium. Background technique [0002] Double-sided perpendicular magnetic recording media (hereinafter also simply referred to as "medium") are known in which information is recorded as perpendicular magnetization in respective magnetic thin films formed on both sides of a substrate. Such media are used for mass storage such as hard disks. [0003] Figure 1A and 1B A view showing the magnetization state of conventional media. Figure 1A shows the magnetization state of the initialized medium, Figure 1B The state of magnetization of the medium in which the signal is recorded is shown. exist Figure 1A and 1B Among them, the medium 1 is composed of a substrate 10 , a first magnet...

Claims

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Application Information

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IPC IPC(8): G11B5/82G11B5/00G11B5/66G11B5/74G11B5/86
CPCG11B5/66G11B5/82G11B5/00G11B5/74G11B2005/0029G11B5/865G11B2005/0005G11B5/852
Inventor 濱口慎吾尾崎一幸
Owner TOSHIBA STORAGE DEVICE CORP
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