Patent ID: 7354647

Claim:
An organic bistable memory device comprising an organic bistable element and a limiter, wherein the organic bistable element comprises an organic thin film bistable body having a single layer structure interposed between a first electrode and a second electrode, and the limiter limits current, which flows in either a positive bias side or a negative bias side to a given value in writing information into the organic bistable element, the organic thin film consisting essentially of an organic compound represented by formula (I): wherein, in R1, R2, and R3, one or two of them each independently represent an electron-donating group selected from the group consisting of â€”H, â€”NH 2 â€”NHR, â€”NR 2 , â€”SR, â€”X, â€”CX 3 , â€”OH, â€”OCH 3 , â€”OR and â€”R wherein R represents a straight chain or branched chain alkyl group having 1 to 24 carbon atoms in which one or at least two methylene groups in the alkyl group are optionally substituted by a substituent of â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”CHWâ€”, wherein W represents â€”Fâ€”Clâ€”Brâ€”Iâ€”CN or â€”CF 3 , â€”CHâ•CHâ€”, or â€”Câ‰¡Câ€”, provided that a plurality of said substituents are not adjacent to each other, and X represents â€”F, â€”Clâ€”Br, or â€”I and the remaining group or groups of R 1 , R 2 , and R 3 each independently represent an electron-receiving group selected from the group consisting of â€”CN, â€”NO 2 , â€”COR, â€”COOH, â€”COOR and â€”SO 3 H.