Patent ID: 8325586

Claim:
A rewritable optical record carrier consisting of a recording stack of layers in the following order: a first dielectric layer having a thickness at a first amorphous reflection minimum; a recording layer comprising a phase-change recording material; a second dielectric layer; and a mirror layer deposited onto the second dielectric layer side of the recording stack, a single thermal barrier layer arranged adjacent to said first dielectric layer opposite the mirror layer to reduce heat dissipation eminating from the recording layer and passing through the first dielectric layer thus allowing the thickness of the first dielectric layer to be chosen at said first amorphous reflection minimum, and wherein said light entering the stack is applied to a side of said optical recording medium to which a substrate is closer than the recording layer, wherein said light entering the stack first penetrates the substrate, and passes through to a thermal barrier layer, the first and second dielectric layers and the recording layer, wherein the major component of the thermal barrier layer is different from the components or mixtures of the first dielectric layer materials.