Patent ID: 7755995

Claim:
A recording and reproducing method for dye-based recordable DVD media, comprising: recording a mark of the shortest length on a dye-containing recording layer by use of a single pulse beam whose front edge is energized; recording marks other than the shortest mark on the dye-containing recording layer by use of a single pulse beam whose front and rear edges are energized for a given duration of time, the power of the front edge of pulse being equal to the power of the front edge of pulse for the shortest mark, the power of the rear edge of pulse being equal to the power of the rear edge of pulse for the shortest mark; and reproducing recorded information by use of a reproduction beam, wherein the irradiation intensity of cooling pulse that comes after the rear edge of pulse at the time of the mark recording is 0.1 mW or less for a given duration of time, and the recording linear velocity is 42 m/s or more, and wherein the dye-containing recording layer is disposed on a substrate of a dye-based recordable DVD medium, the substrate having a guide groove with a wobble.