Patent ID: 7907491
Filing Date: 2011-03-15
Classification: G11B

Abstract:
1. A method of recording information in a recording medium capable of being set in a first state at a second power level and in a second state at a third power level higher than said second power level of an energy beam, said energy beam and said recording medium being moved relatively to each other while radiating said energy beam on said recording medium thereby to record information in said recording medium in the form of length and interval of mark portions in said second state, comprising the steps of: irradiating said recording medium with an energy beam of a first power level lower than said second and third power levels before and/or after recording the information; and irradiating said recording medium with one or more energy beam pulses including at least a pulse or said third power level when forming a mark portion in said second state; wherein a front pulse duration of said third power level is controlled depending on a length of the mark portion to be recorded on said recording medium; and wherein a pulse duration of said first power level is controlled depending on a length of a space portion to be recorded on said recording medium.