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Perpendicular magnetic recording medium, manufacturing method thereof, and magnetic storage device

A technology for perpendicular magnetic recording and media, applied in recording information storage, magnetic recording, data recording, etc., can solve the problems of reduced S/N ratio, increased media noise, and insufficient reduction of the interaction between magnetic particles, so as to improve the S/N ratio. Effects of /N ratio, good crystallinity, good lattice compatibility

Active Publication Date: 2006-10-04
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, when the gaps between the magnetic particles become non-uniform, the interaction between the magnetic particles cannot be sufficiently reduced
As a result, the medium noise of the recording layer will increase, and a decrease in the S / N ratio will occur

Method used

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  • Perpendicular magnetic recording medium, manufacturing method thereof, and magnetic storage device
  • Perpendicular magnetic recording medium, manufacturing method thereof, and magnetic storage device
  • Perpendicular magnetic recording medium, manufacturing method thereof, and magnetic storage device

Examples

Experimental program
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Effect test

no. 1 example

[0065] figure 1 is a sectional view showing the structure of the perpendicular magnetic recording medium according to the first embodiment of the present invention.

[0066] refer to figure 1 , The perpendicular magnetic recording medium 10 of the first embodiment includes a substrate 11 on which a soft magnetic underlayer 12, a seed layer 13, a first underlayer 14, a recording layer 15, a protective film 18 and a lubricant layer 19 are sequentially stacked. The recording layer 15 includes a first magnetic layer 16 and a second magnetic layer 17 stacked in this order from the first underlayer 14 side.

[0067] For example, the substrate 11 may correspond to a plastic substrate, a crystallized glass substrate, a tempered glass substrate, a silicon substrate, or an aluminum alloy substrate. In the case where the perpendicular magnetic recording medium 10 corresponds to a magnetic tape medium, for example, a film having good heat resistance made of polyester (PET), polyethylene...

no. 2 example

[0109] Next, a perpendicular magnetic recording medium 20 according to a second embodiment of the present invention is described. The perpendicular magnetic recording medium 20 of this embodiment includes a second underlayer 21 disposed between the first underlayer 14 and the recording layer 15 . Note that other features of the perpendicular magnetic recording medium 20 of the second embodiment are the same as those of the first embodiment.

[0110] Figure 4 is a cross-sectional view showing the structure of a perpendicular magnetic recording medium 20 according to a second embodiment of the present invention. Figure 5 yes means Figure 4 A more detailed structural diagram of the perpendicular magnetic recording medium 20 is shown. pay attention to Figure 4 with Figure 5 In , the same components as those described in the first embodiment are given the same reference numerals, and their descriptions are omitted.

[0111] refer to Figure 4 with Figure 5 , the perpe...

no. 3 example

[0121] Next, a perpendicular magnetic recording medium 30 according to a third embodiment of the present invention is described. The perpendicular magnetic recording medium 30 of this embodiment includes a recording layer 35 including first to nth magnetic layers. Note that other features of the perpendicular magnetic recording medium 30 according to the present embodiment are substantially the same as those of the perpendicular magnetic recording medium 10 of the first embodiment.

[0122] Image 6 is a cross-sectional view showing the structure of the perpendicular magnetic recording medium 30 according to the third embodiment. In this figure, the same components as those of the first embodiment described above are given the same reference numerals, and their descriptions are omitted.

[0123] refer to Image 6 , the perpendicular magnetic recording medium 30 includes a substrate 11 on which a soft magnetic underlayer 12 , a seed layer 13 , a first underlayer 14 , a recor...

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Abstract

A perpendicular magnetic recording medium for enabling high density recording is disclosed. The perpendicular magnetic recording medium includes a substrate on which a soft magnetic underlayer, a seed layer made of a non-crystalline material, an underlayer made of Ru or an Ru alloy including Ru as a main component, and a recording layer including a first magnetic layer and a second magnetic layer. The first and second magnetic layers include a plurality of magnetic grains having easy magnetization axes in a substantially perpendicular direction with respect to the substrate surface, and first and second nonmagnetic non-soluble phases segregating the magnetic grains of the first and second magnetic layers, respectively. The first magnetic layer includes the first non-soluble phase at a first atomic concentration that is higher than a second atomic concentration of the second non-soluble phase in the second magnetic layer.

Description

technical field [0001] The present invention generally relates to a perpendicular magnetic recording medium, a manufacturing method thereof, and a magnetic storage device. In particular, the invention relates to perpendicular magnetic recording media comprising a recording layer in which magnetic particles are separated by non-magnetic material. Background technique [0002] Magnetic storage devices, such as hard disk drives, are digital signal storage devices suitable for increased capacity, with low storage unit cost (per bit). In recent years and thereafter, for example, as hard disk drives are applied to personal computers and digital image / audio devices, the demand for hard disk drives is still increasing. Also, a further increase in the capacity of the hard disk drive is required. [0003] By achieving higher density recording on magnetic recording media, both increased storage capacity and reduced cost of hard disk drives can be achieved. By realizing higher-densit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/65
Inventor 向井良一
Owner SHOWA DENKO KK
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