Patent ID: 7364940

Claim:
An organic thin film transistor including a substrate, a gate electrode, a gate insulating layer, an organic semiconductor layer, a source electrode, and a drain electrode, the organic thin film transistor comprising: a fluorine-based polymer thin film formed between the gate insulating layer and the organic semiconductor layer, wherein the fluorine-based polymer thin film is formed of a polymer having a number ratio of carbon atoms to fluorine atoms from about 5:1 to about 30:1 and containing at least one repeating unit selected from the group consisting of repeating units represented by Formula 1 and repeating units represented by Formula 2 below: wherein X is a hydrogen atom, a C 1˜14 linear or branched alkyl group, a fluorine atom, or a chlorine atom, Y is an oxygen atom or a C 2˜14 alkylene group, and R is a group of represented by Formula 3 below: wherein R 1 is independently any one of the functional groups represented by Formulae 4 below: R 2 is independently any one of the functional groups represented by Formulae 5 below: and R 3 is independently any one of the functional groups represented by Formulae 6 below: (where X contains at least one fluorine atom, and X is independently H, F, CF 3 , CHF 2 , CH 2 F, OCF 3 , OCHF 2 or OCH 2 F, and m is an integer from 0 to about 18), k is an integer between 1 and 3, provided that when k is 2 or greater, each R 1 may be the same or different, and l is an integer between 0 and 5, provided that when l is 2 or greater, each R 2 may be the same or different.