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Magnetic transfer apparatus

A technology of magnetic transfer and transfer, applied in the direction of record carrier manufacturing, re-recording, etc., can solve the problems of clamp deformation, reduction of tight joint force, increase of gap between main carrier and slave medium, etc.

Inactive Publication Date: 2006-09-13
富士胶控股片株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] Although the details are shown in the following experimental example, when the vacuum suction method is used as the application method of the close bonding force, it can be seen that the force acts uniformly on the holder, and in the area where the master carrier and the slave medium are installed, The force between the grippers is balanced, but in the area where there is no setting, the gripper will deform within the range of the balanced force
In addition, it is also clearly known that the force is concentrated at the tightly bonded disk ends of the master carrier and the slave medium, and that the tightly bonded force decreases between the central part and the gap between the master carrier and the slave medium increases, resulting in poor signal transfer. phenomenon occurs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] The holder of Example 1 is made of duralumin and is circular with a true circularity of 99% and a thickness of 5mm. The bending firmness is shown in Table 1, and the bending firmness can correspond to the changed material used. Specifically, hard disks, magnesium alloys, stainless steel alloys, and the like can be used.

Embodiment 2

[0079] The holder of embodiment 2 is the same as that of embodiment 1 except that the thickness of the holder is 3 mm, and the holder of embodiment 3 is the same as that of embodiment 1 except that the thickness of the holder is 38 mm. The holder of Comparative Example 1 is the same as that of Example 1 except that the thickness of the holder is 2 mm, and the holder of Comparative Example 2 is the same as that of Example 1 except that the thickness of the holder is 45 mm. The holder of Comparative Example 3 is the same as that of Example 1 except that the shape of the holder is changed into a square. The holder of Comparative Example 4 is the same as that of Example 1 except that the roundness of the holder is set at 96%. The holder of Comparative Example 5 is the same as that of Example 1 except that the material of the holder is changed to pure copper.

[0080] (specific permeability)

Embodiment 4

[0081] Example 4 is a holder made of the same duralumin as Example 1, with a circularity of 99%, a thickness of 5 mm, and a specific magnetic permeability of 0.8.

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Abstract

The invention relates to a magnetic transfer device, wherein the main carriers (3, 4) with transfer information and the subject medium (2) accepting transfer are compacted combined, to be mounted into clamper (10); the magnetic field processor (5) functions transfer magnetic field. And the invention is characterized in that: the specific resistance value of clamper material (10) is above 2.0*10-8omega .m and under 20*10-8omega .m. And with said structure, the magnetic transfer is processed with uniform force, to avoid signal miss and improve the quality of transfer signal.

Description

technical field [0001] The present invention relates to a magnetic transfer device for magnetic transfer from a master carrier carrying information to a slave medium. Background technique [0002] In magnetic recording media, it is generally desired to use a so-called high-speed access medium to increase the amount of information, and at the same time, to record more information with a large capacity and at low cost, and to read from a desired location in a short time. As one example, a high-density elastic disk is known. In order to realize its large capacity, so-called tracking servo technology plays a major role. That is, the magnetic head accurately scans a narrow track width to perform signal reproduction with a high S / N ratio. A servo signal for tracking, an address information signal, a playback timing signal, and the like are recorded at certain intervals by a so-called pre-format in one turn of the disc. [0003] Read such pre-formatted information through the magn...

Claims

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Application Information

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IPC IPC(8): G11B5/86G11B5/84
Inventor 西川正一新妻一弘镰谷彰人
Owner 富士胶控股片株式会社
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