Patent ID: 7132682

Claim:
An electronic device containing a polythiophene wherein R represents a side chain, m represents the number of R substituents; A is a divalent linkage; x represents the number of R m substituted thienylene moieties, y represents the number of unsubstituted thienylene moieties, z represents the number of divalent linkages A in the monomer segment subject to z being 0 or 1, and n represents the number of repeating monomer segments in the polymer or the degree of polymerization, the polythiophene having a number average molecular weight (M n ) from about 4,000 to about 50,000, and a weight average molecular weight (M w ) from about 5,000 to about 100,000; both M n and M w being measured by gel permeation chromatography using polystyrene standards, and which device is comprised of a substrate, a gate electrode, a gate dielectric layer, a source electrode and a drain electrode, and in contact with the source/drain electrodes and the gate dielectric layer a semiconductor layer comprised of said polythiophene, and wherein n is a number of from about 5 to about 5,000.