Patent ID: 7376055
Filing Date: 2008-05-20
Classification: G11B

Abstract:
1. A method of annealing an optical recording medium formed on a substrate having a land and a groove, comprising the steps of: annealing one side wall between the land and the groove with a predetermined laser power; moving the laser to another side wall by allowing the laser to traverse one of the land and the groove with a laser power for not annealing after the step of annealing is conducted; and annealing the another side wall with the laser power, wherein each of the steps of annealing is conducted by using three light beams consisting of a main beam and two sub-beams, adjacent land and groove are tracked by the sub-beams, and the main beam is irradiated onto the side wall between the land and the groove, and wherein a track offset that occurs when conducting the steps of annealing is corrected such that a track offset at a side wall to be annealed first and a track offset at a side wall to be annealed next is made different.