Patent ID: 8473973

Claim:
Recordable optical record carrier for recording information using a radiation beam having wavelength λ and incident on an entrance surface of the optical record carrier comprising, in this order: a protective layer facing the entrance surface, a first recording stack (LO), said recording stack comprising a recording layer of an organic dye material and a groove structure, a transparent spacer layer sandwiched between neighboring recording stacks, and a second recording stack (LN) comprising a recording layer, wherein the groove depth of the recording layer of the first recording stack (LO) is in a range from 0.241*λ/n S to 0.333*λ/n S , where n S is a refractive index of a material in a land between grooves on the groove structure, and wherein the refractive index n S is 1.58 and the wavelength λ is in a range of 650 nm-655 nm, and wherein a groove width of the recording layer of the first recording stack (LO) is in a range from 198 nm to less than 400 nm.