| abstract |
There is disclosed an optical recording medium having at least a recording layer provided on a light-transmissive substrate having grooves and lands with pre-pits, which is characterized that said lands are generally rectangular or trapezoidal in cross section having a top surface and sidewalls, as well as a specified land height (h1), and said pre-pits are formed in a land in the center area of the land in a width direction thereof, and spaced from the adjacent grooves by boundary walls of a specified height (h2). With the present invention, the optical recording medium permits the address information and disk rotation control information to be accessed accurately, and which still can be manufactured efficiently, with the capability of signal recording in high density and reproduction of high-quality signals. |