Method for manufacturing magnetic recording medium, and magnetic recording/reproducing apparatus
A technology for magnetic recording media and manufacturing methods, applied in the field of magnetic recording media manufacturing and magnetic recording and reproducing devices, capable of solving problems such as uneven coating and achieving high recording and reproducing characteristics
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no. 1 Embodiment approach
[0075] Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.
[0076] figure 1 It is a cross-sectional view schematically showing an example of a magnetic recording medium produced by the production method of the present invention. In this embodiment, a discrete track type magnetic recording medium in which recording tracks are arranged magnetically discontinuously will be described as an example.
[0077] figure 1 The shown magnetic recording medium 30 uses a magnetic head to read and write, and is formed with a soft magnetic layer 32a, an intermediate layer 32b in sequence on the surface of a nonmagnetic substrate 31, and alternately arranges a magnetic recording pattern 33 made of a magnetic layer and a nonmagnetic layer. A magnetic recording medium comprising a magnetic recording layer 33a made of a magnetized layer 34, a protective film layer 35, and a lub...
no. 2 Embodiment approach
[0120] In the above-mentioned manufacturing method of the first embodiment, the case where a resist layer is formed on one non-magnetic substrate in the resist layer forming step has been described as an example. Figure 3B As shown, resist layers can also be formed on a plurality of non-magnetic substrates at one time. Figure 3B It is a figure for explaining the example of the dipping process etc. of a resist layer forming process, and is a schematic perspective view which only shows the non-magnetic substrate 31 and the resist solution 11. The manufacturing method of the magnetic recording medium of this embodiment differs from the above-mentioned first embodiment only in the number of non-magnetic substrates 31 to which the resist solution is applied in the resist layer forming step, and therefore other descriptions are omitted. .
[0121] In the method of manufacturing a magnetic recording medium according to the present embodiment, four nonmagnetic substrates 31 are arr...
Embodiment
[0136] Prepared by Eli 2 Si 2 o 5 、Al 2 o 3 -K 2 O, Al 2 o 3 -K 2 O, MgO-P 2 o 5 , Sb 2 o 3 -For hard disks (HD) with a diameter of 1.89 inches (Φ48mm) made of crystallized glass composed of ZnO figure 2 The non-magnetic substrate 31 shown, the non-magnetic substrate 31 is arranged in the vacuum chamber of the sputtering device, and the vacuum chamber is evacuated until the pressure becomes 1.0×10 -5 Below Pa.
[0137] Next, on the data recording area 4 of the non-magnetic substrate 31, a soft magnetic layer 32a made of FeCoB, an intermediate layer 32b made of Ru, a soft magnetic layer 32b made of 70Co-5Cr-15Pt-10SiO were sequentially formed by sputtering. 2 A magnetic layer made of an alloy (magnetic layer forming step). Next, on the surface of the magnetic layer, a protective film layer 35 made of C (carbon) and a lubricating layer 36 made of a fluorine-based lubricant were sequentially formed using a CVD method.
[0138] The film thickness of each layer is: ...
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Abstract
Description
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