Process for producing magnetic recording medium and magnetic recording medium
A technology of magnetic recording medium and manufacturing method, which is applied in the fields of magnetic recording, data recording, disc carrier manufacturing, etc., and can solve the problems of higher cost, longer length, larger size, etc.
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example 1
[0112] Ten magnetic recording media 30 were manufactured using In as the non-magnetic material 36 as in the first embodiment described above. Specifically, after the In film was formed on the surface of the workpiece 10 on which the recording layer 32 was formed in a concave-convex pattern on the substrate 12 by the sputtering method, the workpiece 10 was rotated for about 5 minutes and heated at 200° C. Maintaining and heating in a temperature environment makes the surface of In uniform. Next, while adding a small amount of Si particles to the surface of In, the object 10 to be processed is maintained and cooled in a normal temperature environment, whereby In is solidified. Further, Ar gas is irradiated from a direction substantially perpendicular to the surface of the object 10 to remove In until the surface of the recording element 32A is exposed, thereby flattening the surface of the object 10 to be processed. Furthermore, the protective layer 38 and the lubricating layer...
example 2
[0114] In contrast to Example 1, ten magnetic recording media 30 were manufactured using ultraviolet curable resin instead of In as the non-magnetic material 36 . Specifically, after forming a film of ultraviolet curable resin on the surface of the workpiece 10 on which the recording layer 32 is formed in a concavo-convex pattern on the substrate 12 by the spin coating method, the ultraviolet curable resin is cured by irradiating ultraviolet rays for about 5 minutes. Further, Ar gas is irradiated from a direction approximately perpendicular to the surface of the object 10 to remove the ultraviolet curable resin until the surface of the recording element 32A is exposed, thereby flattening the surface of the object 10 to be processed. Other conditions are the same as in Example 1 above. A test of the maximum level difference was performed on the surface of the magnetic recording medium 30 obtained by the above method, and the result was that the maximum level difference was 1 nm...
example 3
[0116] As in the second embodiment above, the SiO 2 As the non-magnetic material 37, ten magnetic recording media 30 were manufactured. Specifically, a film of SiO was formed on the surface of the workpiece 10 on which the recording layer 32 was formed on the substrate 12 in a concavo-convex pattern by sputtering. 2 Then, while rotating the workpiece 10, the SiO 2 A resist material is filmed on the surface. Next, Ar gas is irradiated from a direction approximately perpendicular to the surface of the object to be processed 10 to remove the resist material and SiO2. 2 The surface up to the recording element 32A is exposed, and the surface of the object 10 to be processed is flattened. In addition, Ar gas was irradiated under the condition that the resist material was maintained in a fluid state and solidification did not occur. Furthermore, the protective layer 38 and the lubricating layer 40 were formed, and ten magnetic recording media 30 were manufactured. The surface of...
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