Patent ID: 7864645

Claim:
A method of recording marks having a time length of nT, n representing an integer larger than 1 and T representing the length of one period of a reference clock, in a record carrier, the value of n changing at times for subsequent marks depending on information being written to the record carrier, said record carrier comprising an information layer having a phase reversibly changeable between a crystal phase and an amorphous phase, the method comprising the acts of: irradiating the information layer by a pulsed radiation beam, and writing each mark with a sequence of m pulses, m representing an integer larger than or equal to 1 and lower than or equal to n, wherein m is set to the nearest integer larger than or equal to n/Î±, Î± being an integer equal to 3, Î± being independent of n, and Î± being constant for multiple subsequent marks, wherein said pulse sequence is altered when a same value of m is determined for different values of n, said alteration being dependent upon n in the form of at least one of: extended pulse duration and different pulse amplitudes.