Patent ID: 7070703

Claim:
A process of manufacture for producing glass disk substrates for magnetically recordable data storage disks comprising the steps of: providing a circular flat disk of glass with a hole centered therein; performing a first polishing process on the glass disk, the first polishing process being a rough isotropic polishing process for forming scratches on the disk, wherein the scratches are not concentric; after performing the first polishing process, performing a second polishing process on the glass disk, the second polishing process being a fine isotropic polishing process; chemically strengthening the disk; after chemically strengthening the disk, texturing the disk to form a plurality of scratches formed as discontinuous, concentric arcs of random length and depth, wherein the texturing of the disk comprises: engaging a cylindrical polishing pad with a surface of the disk, the polishing pad having an axis oriented parallel with a radius of the disk; rotating the disk; rotating the cylindrical polishing pad about its axis, counter to the direction of travel of the disk; and applying a diamond slurry; and after texturing the disk, performing a third polishing process, the third polishing process being a fine polishing processes performed by engaging a cylindrical polishing pad with a surface of the disk, the cylindrical polishing pad having an axis oriented parallel with a radial axis of the disk, rotating the polishing pad about its axis, and applying an etching solution.