Magnetic recording medium and magnetic recording and reproducing device

A magnetic recording medium and magnetic recording layer technology, applied in magnetic recording, information recording on disk, data recording, etc., to achieve good flatness, eliminate noise, and inhibit the growth of crystal particles

Inactive Publication Date: 2006-01-25
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, there is a problem that the gap length (synonymous with "space loss", and the same expression will be applied hereinafter) between the magnetic recording layer formed on the magnetic recording medium and the magnetic head will increase.

Method used

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  • Magnetic recording medium and magnetic recording and reproducing device
  • Magnetic recording medium and magnetic recording and reproducing device
  • Magnetic recording medium and magnetic recording and reproducing device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0110] The non-magnetic layer 6 is formed on the body to be processed obtained as described above. First, under the conditions of 500W film forming power, 150W bias power and 0.3Pa Ar gas pressure, SiO with a thickness of 100nm was formed by sputtering 2 film. Incidentally, the film thickness here means the film thickness when the film is formed in parallel on a flat surface. After the nonmagnetic layer 6 is formed, ion beam etching is performed on the body to be processed with Ar gas and an incident angle of 2 degrees. Like this, eliminate remaining SiO on the magnetic recording layer 5 2 , thereby making the surface flat. Etching was monitored with a mass spectrometer. Once the magnetic recording layer in the data track region 20 starts to be detected, the planarization is complete.

[0111] Incidentally, when the nonmagnetic layer 6 has been formed, the surface position of the nonmagnetic layer 6 in the servo pattern area 21 is lower than that of the nonmagnetic layer ...

example 2

[0118] Figures 4A-4B The manufacturing method of the magnetic recording medium shown is similar to that in Example 1. This magnetic recording medium can be produced as follows. That is, in the ion beam etching of the non-magnetic layer of Example 1, from the start of detection of the magnetic recording layer 5 in each servo pattern area 21 to the start of detection of the magnetic recording layer 5 in each data track area 20, the ions are delayed. beam etching. In this way, planarization is completed.

example 3

[0120] Figures 5A-5B The manufacturing method of the magnetic recording medium shown is similar to that in Example 1. This magnetic recording medium can be produced as follows. That is, in the ion beam etching of the non-magnetic layer of Example 1, once the detection of the magnetic recording layer 5 in each servo pattern area 21 starts, the ion beam etching is suspended. The incident angle is changed from 2 degrees to 90 degrees (90 degrees, because the etching rate of the magnetic recording layer 5 is higher than that of the non-magnetic material (SiO 2 ) etch rate", and then resume the ion beam etching. Once the magnetic recording layer 5 in each data track area 20 starts to be detected, the ion beam etching is suspended. In this way, the planarization is completed.

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Abstract

The present invention provides a magnetic recording medium including at least a disk substrate 1 A, a magnetic recording layer 5 formed with a predetermined concavo-convex pattern on the disk substrate 1 A, and a non-magnetic layer 6 filled into concave portions of the concavo-convex pattern, so as to have data track regions 20 and servo pattern regions 21 . Due to the existence of concaves and convexes in the surface of each servo pattern region 21 , the foregoing problem is solved. On this occasion, arithmetical mean deviation of the assessed profile Ra of the surface of each servo pattern region 21 is preferably not lower than 0.3 nm. The difference in surface level between each concave and each convex existing in the surface of the servo pattern region 21 is preferably not larger than 6 nm.

Description

technical field [0001] The present invention relates to a magnetic recording medium and a magnetic recording-replication device, in particular to a magnetic recording medium, wherein the static friction force between the magnetic recording medium and the magnetic head slider can be effectively avoided, thereby avoiding crushing and damage caused by the static friction force Similarly, a magnetic head slider flies on the surface of a magnetic recording medium and is equipped with a magnetic head for recording and reproducing information to / from said magnetic recording medium, and a magnetic recording and reproducing apparatus having the magnetic recording medium. Background technique [0002] Magnetic recording media such as hard disks have seen significant improvements in surface density through technological improvements such as optimizing the granulation of magnetic particles used to form the magnetic recording layer, changing materials, and optimiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/82G11B5/012G11B5/40G11B5/65G11B5/09G11B5/855
CPCG11B5/855
Inventor 日比干晴服部一博岛川和也
Owner TDK CORPARATION
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