| 摘要 |
PURPOSE:To make pit lengths uniform to a specified value, and to obtain an optical recording medium having excellent recording characteristics and high environmental stability by recording so as to form a rim part at a recording position after irradiated with a recording laser light. CONSTITUTION:An optical recording medium has a transparent board 1, a recording layer 2, and a metal layer 3. Recording is conducted so as to form a rim part 7 at a recording position. The part 7 clarifies a boundary between a recording pit part 6 and a land part in a group 5. A protrusion formed around the pit is provided. The part 7 is set, for example, to a width in which the width of the rim can be actually recognized such as 1nm to 250nm and the height is 1nm to 250nm. As a result, recording information can be accurately read on a various player having pick-ups in which oscillating laser wavelengths, optical characteristics and optical quantity are delicately different. |
