Methods and devices for recording marks in an information...

Details Methods and devices for recording marks in an information... Methods and devices for recording marks in an information...

2007-09-18

2007-09-18

Tran, Thang V. (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

C369S047510

Reexamination Certificate

active

11004013

ABSTRACT:
Methods and devices are described for writing an optical record carrier, in which a mark representing recorded data is written in a phase-change layer of a record carrier by a sequence of radiation pulses. A rear heating pulse24is introduced after a last write pulse23, 26and a front heating pulse25is introduced before the first write pulse22,26. The power level13of the front heating pulse and the power level15of the rear heating pulse may be dependent on the length of the mark to be recorded and on properties of the record carrier. The method results in a reduced jitter of the marks written, especially when writing at high recording speeds.

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