Patent ID: 7698716
Filing Date: 2010-04-13
Classification: G11B

Abstract:
1. An optical medium readable by at least one pre-selected optical beam comprising: a first substrate; a first data storage layer proximate to said first substrate, wherein said first data storage layer comprises an encoded information receiving layer and a reflective layer; a second data storage layer, wherein said second data storage layer comprises an encoded information receiving layer and a reflective layer; at least one intervening layer between said first data storage layer and said second data storage layer; and a read inhibiting agent, said read inhibiting agent in communication with at least one of said first data storage layer and second data storage layer, wherein said read inhibiting agent permits access to at least a portion of said at least one of said first data storage layer and second data storage layer for a predefined period of time and after such predefined period of time said read inhibiting agent irreversibly prohibits access to said at least a portion of said at least one of said first data storage layer and second data storage layer; wherein said first data storage layer and said second data storage layer are readable with different optical wavelengths.