Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material
Patent
1997-03-25
1999-11-09
Crane, Sara
Active solid-state devices (e.g., transistors, solid-state diode
Organic semiconductor material
257295, 257410, H01L 3524
Patent
active
059819707
ABSTRACT:
A thin film transistor (TFT) device structure based on an organic semiconductor material, that exhibits a high field effect mobility, high current modulation and a low sub-threshold slope at lower operating voltages than the current state of the art organic TFT devices. The structure comprises a suitable substrate disposed with he following sequence of features: a set of conducting gate electrodes covered with a high dielectric constant insulator, a layer of the organic semiconductor, sets of electrically conducting source and drain electrodes corresponding to each of the gate lines, and an optional passivation layer that can overcoat and protect the device structure.
Use of high dielectric constant gate insulators exploits the unexpected gate voltage dependence of the organic semiconductor to achieve high field effect mobility levels at very low operating voltages. Judicious combinations of the choice of this insulator material and the means to integrate it into the TFT structure are taught that would enable easy fabrication on glass or plastic substrates and the use of such devices in flat panel display applications.
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Dimitrakopoulos Christos Dimitrios
Duncombe Peter Richard
Furman Bruce K.
Laibowitz Robert B.
Neumayer Deborah Ann
Crane Sara
International Business Machines - Corporation
Morris Daniel P.
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