Patent ID: 7786470

Claim:
A switching element having two stable resistance values with respect to the voltage applied between electrodes, comprising: a substrate, a first electrode layer, an organic bistable material layer, and a second electrode layer, said first electrode layer, said organic bistable material layer and said second electrode being successively formed as thin films on said substrate wherein the organic bistable material constituting said organic bistable material layer is a quinomethane-based compound represented by the general formula (I) below: wherein each of R 1 -R 4 represents a group selected from a hydrogen atom, an optionally substituted C 1-6 alkyl group, and an optionally substituted aryl group, where R 1 -R 4 may be same or different, each of R 5 and R 6 represents an optionally substituted aryl group or an optionally substituted hetero ring, where R 5 , R 6 may be same or different and A represents a group selected from groups (1)-(10) shown below