OPTICAL RECORDING MEDIUM AND ITS MANUFACTURE METHOD

摘要

PROBLEM TO BE SOLVED: To provide an optical recording medium and its manufacturing method having a direct-read-after-write capable section and a prepit section in which servo characteristic is made stable in an unrecorded condition and after a recording and good quality reproduced signals are obtained by improving the degree of modulation of the prepit section. SOLUTION: The medium has a direct-read-after-write capable section which is constituted of lands 3 and grooves 2 and prepit 4. A minimum pit length of the prepit 4 is made longer than the minimum recording pit length formed on the direct-read-after-write section and is made not more than twice the length of the minimum recording pit length. Moreover, in the manufacturing method of the optical recording medium, the recording layer, that is provided with a prepit section, of the optical recording medium having a direct-read-after- write section with a land/groove structure and a prepit section is beforehand irradiated with laser light beams and is put into a recorded condition.