Patent ID: 6204515
Filing Date: 2001-03-20
Classification: H01L

Abstract:
A field effect transistor, comprising:(a) an insulator layer, the insulator layer being an electrical insulator, the insulator layer having a first side and a second side;(b) a gate, the gate being an electrical conductor, the gate being positioned adjacent the first side of the insulator layer;(c) a semiconductor layer, the semiconductor layer comprising a copolymer of at least one fluorene-based monomer and at least one other conjugated monomer containing up to 30 carbon atoms, which other monomer is not a fluorene, at least ten weight percent of the monomer units of the copolymer being selected from the group consisting of a 9-substituted fluorene unit and a 9,9-substituted fluorene unit, the semiconductor layer having a first side, a second side, a first end and a second end, the second side of the semiconductor layer being adjacent the second side of the insulator layer;(d) a source, the source being an electrical conductor, the source being in electrical contact with the first end of the semiconductor layer; and(e) a drain, the drain being an electrical conductor, the drain being in electrical contact with the second end of the semiconductor layer.