Patent ID: 7309874

Claim:
A field-effect transistor comprising: a gate electrode formed at one side of a base substrate; a source electrode formed at the one side of the base substrate; a drain electrode formed at the one side of the base substrate; an insulation layer formed between the gate electrode and the source electrode and between the gate electrode and the drain electrode; a semiconductor layer formed around the source electrode and the drain electrode; and a functional layer provided so as to come into contact with the semiconductor layer and containing electron acceptors, said functional layer being arranged between said semiconductor layer and said insulating layer, wherein the electron acceptor is a π-conjugate molecule composed of an ethylene molecule or a π-conjugate structure whose carbon number is 3 to 15 to which at least one group of —CN, —NO 2 , —F, —Cl, —Br, —I, and ═O is linked.