Substrate for information recording media and manufacturing...

Details Substrate for information recording media and manufacturing... Substrate for information recording media and manufacturing...

2006-05-09

2006-05-09

Wilson, Lee D. (Department: 3723)

Abrading

Precision device or process - or with condition responsive...

Computer controlled

C451S041000, C451S028000, C065S061000

Reexamination Certificate

active

07040953

ABSTRACT:
There are provided a substrate for information recording media and a manufacturing method thereof, according to which the projection height of minute undulations formed on the substrate surfaces can be made more uniform, and variation in the projection density can be suppressed. First, chemical strengthening treatment is carried out on a glass substrate that has been prepared by processing a sheet-shaped starting material glass plate into a predetermined shape. Then, precision polishing is carried out on the glass substrate that has been subjected to the chemical strengthening treatment, such that a polishing amount in a thickness direction of the glass substrate is within a predetermined range. Finally, surface washing is carried out on the glass substrate that has been subjected to said precision polishing.

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