Patent ID: 6756103
Filing Date: 2004-06-29
Classification: G06F,G11B,Y10T

Abstract:
An optical media comprising:a substrate, wherein said substrate includes information encoding features encoded therein; a reactive layer, wherein said reactive layer transforms from a substantially transparent state to a state that interferes with the passage of light in response to predefined stimulus, said reactive layer comprising: a reactive material, wherein said reactive material has a first state that is substantially unreactive with said predefined stimulus; and a second state that is substantially reactive with said predefined stimulus; whereinsaid first state comprises at least one blocked dye derived by the reduction of a dye selected from azines, oxazines, thiazines, and combinations thereof; and said second state comprises said at least one blocked dye unblocked; wherein said at least one blocked dye derived by the reduction of a dye having the formula (I): wherein Y+ represents O+, S+, or N+R12, wherein R12 is selected from hydrogen, alkyl, or aryl groups; Z is selected from NR9R10, OR11, hydrogen, alkyl, aryl, azo, or fused aromatic components; R1, R2, R3, R4, R5, and R6 each independently is selected from hydrogen, alkyl, aryl, nitro, or fused aromatic groups; R7, R8, R9, R10, and R11 each independently is selected from hydrogen, alkyl or aryl groups; and Xâˆ’ represents a halogen or other suitable anion; wherein said optical media further comprises a carrier material.