Patent ID: 6908725

Claim:
A first surface optical disk, comprising: a substrate having a circular first surface and an opposing circular second surface, wherein the outer diameter of the first and second surface is approximately less than 50 mm; a spiral pattern of bumps on a first portion of the circular first surface, wherein information is stored on and read from the bumps; a second portion of the circular first surface defining a pattern of alternating lands and grooves, wherein each groove has inclined sidewalls, the inclined sidewalls for each groove being inclined approximately 45 degrees with respect to a bottom of the groove; and a continuous multi-layer optical coating overlaying the bumps and the lands and grooves on the circular first surface, wherein the optical coating comprises: a metal/alloy layer comprising tin, antimony and an element selected from the group consisting of indium, germanium, aluminum, and zinc; and a dielectric layer overlaying the metal/alloy layer, the dielectric layer being configured to optically couple the metal/alloy layer to a laser beam incident on the dielectric layer.