Credit card sized data carrier with both CD or DVD function and smart or authentication card functions in which the optical storage data area is protected by raised beads on its inner and outer circumferences to prevent scratching

摘要

Credit card sized optical data medium that functions either as a CD or DVD or as a smart card or access card with magnetic strip and or chip on the opposite side to the data region (5) of the optical storage medium. To protect the data region of the optical storage region, beads (18, 19) are placed around its inner and outer radii.