Optical recording medium for writing data using multiple pulses

Details Optical recording medium for writing data using multiple pulses Optical recording medium for writing data using multiple pulses

2010-06-07

2011-11-15

Dinh, Tan X (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S059110, C369S116000

Reexamination Certificate

active

08059523

ABSTRACT:
An optical recording medium including a plurality of recording layers to record/reproduce information using light with a predetermined wavelength, the information being recorded on one of the recording layers using a mark and a space, wherein a channel clock period T is provided for recording the mark on one of the recording layers. A plurality of pulses, including a last pulse arranged at an end of the pulses, are used to record the mark with length 3T, the mark being recorded with a condition that a width of the last pulse is minimum 0T and maximum 1.10T, in which a first subsequent level lower than a peak power level of the last pulse is arranged next to the last pulse, and a second subsequent level lower than the peak power level but higher than the first subsequent level is arranged next to the first subsequent level.

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Office Action mailed May 24, 2011, in Japanese Patent Application No. 2007-160307 filed Jun. 18, 2007 (with English Translation).

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