| 摘要 |
Subject: to high-yield obtain a glass substrate used in a magnetic recording media, which prevents from generating the defects, such as scars, etc., before a main plane lapping process, and is excellent in main plane smoothness. Solution: the glass substrate used in the magnetic recording media is a glass substrate used for forming the disc-like glass substrate used in the magnetic recording media of which the central part is equipped with a circular hole, on at least one main plane, a protection film containing a resin is arranged. The method for manufacturing the glass substrate used in the magnetic recording media comprises the steps of preparing the glass substrate used in the magnetic recording media; processing the glass substrate used in the magnetic recording media into the disc-like glass substrate used in the magnetic recording media of which the central part is equipped with the circular hole, lapping the main planes of the glass substrate; cleaning the glass substrate. The step of preparing the glass substrate used in the magnetic recording media comprises forming the protection film containing the resin on at least one main plane of the glass substrate and forming the protection film of the glass substrate used in the magnetic recording media. |
