Patent ID: 7622734

Claim:
A complementary thin film transistor (C-TFT) comprising: a substrate; two gate electrodes arranged on or above the substrate; an insulating layer covering the gate electrodes; source/drain electrodes arranged so that the two gate electrodes are each positioned between a source electrode and a drain electrode through the intermediary of the insulating layer and that source/drain electrodes positioned between the two gate electrodes constitute one electrode; and an organic thin-film semiconductor arranged between the source/drain electrodes; wherein the organic thin-film semiconductor is so configured as to be used as a p-type semiconductor, wherein a self-assembled monolayer is arranged in an n-channel field-effect transistor (FET) region between the semiconductor and the source electrode and between the semiconductor and the drain electrode, and wherein the self-assembled monolayer is composed of a molecule corresponding to an alkylthiol, except with sodium replacing terminal hydrogen at an opposite end to sulfur, represented by SH—(CH 2 ) n Na, wherein “n” is an integer of 1 or more.