Optical information recording medium

摘要

Provided is an optical information recording medium including an anti-illegal copy measure such that data can be recorded with only a special recording apparatus and the recorded data can be read out with a general recording/reproducing apparatus. The optical information recording medium 1 includes a disc-like light-transmissive substrate 2 having a surface provided with a spiral groove WB having a wobble and a land LN between adjacent segments of the groove WB, a light-absorbing layer 3 disposed on the surface of the light-transmissive substrate 2, and a light reflection layer 4 disposed on the light-absorbing layer 3. The groove WB has a depth Ds of 140 nm ‰¤ Ds ‰¤ 155 nm, the light-absorbing layer 3 has a recess with a depth Dd of 95 nm ‰¤ Dd ‰¤ 105 nm in the groove, and a push-pull signal before recording has a value of 0.3 or less.