Glass substrate for information recording medium and process...

Details Glass substrate for information recording medium and process... Glass substrate for information recording medium and process...

2006-05-16

2006-05-16

Wilson, Lee D. (Department: 3723)

Abrading

Abrading process

Glass or stone abrading

C451S063000, C451S059000, C216S097000, C065S031000, C065S088000

Reexamination Certificate

active

07044839

ABSTRACT:
A glass substrate for use in an information recording medium is manufactured by polishing a surface of a disc-shaped glass substrate and then performing texture processing on the surface. The texture processing includes the steps of forming lines of texture on the surface of the glass substrate extending along a circumferential direction of the glass substrate by performing a mechanical texture formation method in which the surface of the glass substrate is supplied with an abrasive slurry while an abrasive member slidably contacts the surface, and correcting the shape of the texture by removing burrs formed on the texture during the formation of the texture. The correction of the shape of the texture is performed by using a correcting pad made of foam of a synthetic resin having a 100% modulus of 3 to 40 MPa and scrubbing the surface of the glass substrate with the correcting pad in a direction intersecting the direction in which the texture extends.

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