Method of producing glass substrate for perpendicular magnetic recording disk

Method of producing glass substrate for perpendicular magnetic recording disk

A glass substrate for perpendicular magnetic recording, having a surface with an average surface roughness of 2.0Å or less and surface height variations of 1Å or less with wavelengths in the range of 0.05 mm-0.5 mm in both radial and circumferential directions, is produced by rotating a glass substr...

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Hauptverfasser: Horie, Yuji, Tanifuji, Tatsuya, Kumasaka, Noriyuki
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Sprache:eng
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creator Horie, Yuji
Tanifuji, Tatsuya
Kumasaka, Noriyuki
description A glass substrate for perpendicular magnetic recording, having a surface with an average surface roughness of 2.0Å or less and surface height variations of 1Å or less with wavelengths in the range of 0.05 mm-0.5 mm in both radial and circumferential directions, is produced by rotating a glass substrate, supplying polishing slurry containing a specified amount of abrading particles of artificial diamond on its surface, pressing a polishing tape on the surface and causing this polishing tape to travel in a direction opposite to the direction of rotation of the glass substrate.
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title Method of producing glass substrate for perpendicular magnetic recording disk
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