Information card

Claim 1

An identification device comprising: A. a card means; B. an integrated programmable semiconductor memory device disposed within said card in spaced relationship to the peripheral surfaces thereof and comprising a. a plurality of first access terminals, b. a plurality of second access terminals, and c. a plurality of circuit means for connection of a corresponding one of each of said first terminals to each of said second terminals. C. memory access means extending from a surface of said card to said memory device for selectively activating said circuit means to establish a predetermined connection pattern matrix between selected ones of said first terminals and said second terminals; a. wherein said access means comprises a plurality of conductors extending within said card from a surface thereof to corresponding first and second terminals of said memory device, b. wherein said circuit means comprises a diode circuit selectively activated to active and inactive states in response to said access means, and c. wherein i. said diode circuit comprises back to back diode pairs connected between each of a corresponding one of said first terminals and each of said second terminals to define open circuits therebetween and with the PN junctions of said diodes capable of permanent destruction for short circuit thereof in response to a reverse breakdown voltage across either of said junction in said diode pairs and wherein ii. said access means is adapted to selectively apply a reverse breakdown voltage across predetermined ones of said diode pairs to establish a unidirectional electrical conductive path therethrough.