Patent ID: 7480223

Claim:
A recording method of recording information in a dye-based write-once digital versatile disc (DVD) comprising a substrate having a wobbled guide groove and a recording layer located overlying the substrate and comprising an organic dye, comprising: irradiating the DVD with three kinds of single light pulses, each of which comprising a recording area to record a mark and a cooling area having a light quantity not greater than 0.1 mW for a predetermined time while a space is formed between the adjacent marks, wherein, when the mark having a shortest length is formed, the irradiating comprises: irradiating the DVD with a first single light pulse in which an entire of the recording area has a power level of W 0 or a front end portion of the recording area has a power level of W 0 and a rest portion of the pulse has a power level of W 1 ; when the mark having a second shortest length is formed, the irradiating comprises: irradiating the DVD with a second single light pulse in which an entire of the recording area has a power level of W 1 ; at least a front end portion of the recording area has a power level of W 0 and a rest portion thereof has a power level of W 1 ; or at least a front end portion of the recording area has a power level of W 1 and a rest portion thereof has a power level of W 2 ; when the mark having a third shortest length or longer is formed, the irradiating comprises: irradiating the DVD with a third single light pulse in which at least a rear end portion of the recording area has a power level of W 0 and a rest portion thereof has a power level of W 1 ; or at least a rear end portion of the recording area has a power level of W 1 and a rest portion thereof has a power level of W 2 ; and wherein W 0 , W 1 and W 2 satisfy a relationship, W 0 >W 1 >W 2 , and the highest power level of the second single light pulse is not lower than the highest power level of the third light pulse.