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
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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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