PATTERNED LASER ZONE TEXTURE.

摘要

A METHOD FOR TEXTURING A SUBSTRATE (10) COMPRISES ROTATING THE SUBSTRATE WHILE APPLYING LASER PULSES THERETO. OF IMPORTANCE, THE ROTATIONAL VE;OCITY OF THE SUBSTRATE IS VARIED DURING TEXTURING TO CHANGE THE SPACING OF THE RESULTING LASER BUMPS IN ACCORDANCE WITH A PERIODIC FUNCTION. THIS HELPS REDUCE OR ELIMINATE VIBRATION IN A READ-WRITE HEAD AFTER THE SUBSTRATE IS FORMED INTO A MAGNETIC DISK (100), AND THE MAGNETIC DISK IS IN USE.