Patent ID: 8207525

Claim:
An organic thin film transistor comprising a substrate having thereon at least three terminals of a gate electrode, a source electrode and a drain electrode, an insulator layer and an organic semiconductor layer, with a current between a source and a drain being controlled upon application of a voltage to the gate electrode, wherein the organic semiconductor layer includes an organic compound having a structure of the following general formula (a): wherein A represents an oxygen atom or a sulfur atom; B represents a divalent aromatic hydrocarbon group having from 6 to 60 carbon atoms or a divalent heterocyclic group having from 1 to 60 carbon atoms; and R 1 to R 10 each independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group having from 1 to 30 carbon atoms, a haloalkyl group having from 1 to 30 carbon atoms, an alkoxyl group having from 1 to 30 carbon atoms, a haloalkoxyl group having from 1 to 30 carbon atoms, an alkylthio group having from 1 to 30 carbon atoms, a haloalkylthio group having from 1 to 30 carbon atoms, an alkylsulfonyl group having from 1 to 30 carbon atoms, a haloalkylsulfonyl group having from 1 to 30 carbon atoms, an aromatic hydrocarbon group having from 6 to 60 carbon atoms or an aromatic heterocyclic group having from 1 to 60 carbon atoms, each of these groups may have a substituent, and these groups may be connected to each other to form an aromatic hydrocarbon group having from 6 to 60 carbon atoms or an aromatic heterocyclic group having from 1 to 60 carbon atoms, wherein; an On/Off ratio of the organic thin film transistor is at least 1*10 5 .