Polishing method, polishing device, glass substrate for magnetic recording medium, and magnetic recording medium
AssigneeHoya Corporation
InventorTakemi Miyamoto
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Abstract
There are disclosed a polishing method and a polishing device in which cleaning of a glass substrate surface can be achieved to a high level. A glass substrate (MD substrate 1) in the shape of a circular disc having a circular hole in a center portion is immersed in an abrasive liquid 50 containing free abrasive grains, and an inner peripheral end surface of the glass substrate is polished using the abrasive liquid containing the free abrasive grains by rotating a rotary brush 4 or a polishing pad in contact with the inner peripheral end surface.
Claims6
A method for polishing a glass substrate in the shape of a circular disc having a circular hole in a center portion thereof comprising the steps of:
- immersing said glass substrate in an abrasive liquid containing free abrasive grains;
- and polishing inner or outer peripheral end surface of said glass substrate by having a rotating brush or pad in said abrasive liquid to engage said free abrasive grains in contact with the inner or outer peripheral end surface of said glass substrate.
A method for polishing a glass substrate for a magnetic recording medium in the shape of a circular disc having a circular hole in the center portion thereof comprising the steps of:
- (i) immersing said glass substrate in an abrasive liquid containing free abrasive grains;
- and (ii) polishing an inner or an outer peripheral end surface of the glass substrate by having a rotating brush or pad in said abrasive liquid to engage said free abrasive grains in contact with the inner or outer peripheral end surface of said glass substrate.
Dependencies are inferred from the claim text.