Patent ID: 7839747
Filing Date: 2010-11-23
Classification: G11B

Abstract:
1. A method of recording marks on an information layer of a record carrier, the method comprising acts of: irradiating an information layer with a pulsed radiation beam to record marks on said information layer, said information layer having a phase that is reversibly changeable between a crystal phase and an amorphous phase; and writing an even mark having a time length of nT by a sequence of n/2 pulses, where n denotes an even integer value selected from 4, 6, 8, or 10 and T denotes a length of one period of a reference clock, and an odd mark having a time length of nT by a sequence of (n−1)/2 pulses, where n denotes an odd integer value selected from 5, 7, 9 or 11, wherein a last pulse in the sequence of pulses for writing the odd mark has a period that is a first period difference Δ