Patent ID: 7223995

Claim:
A logic gate, comprising: at least one first and one second interconnected organic field effect transistor (OFET) forming said logic gate, each OFET transistor including an organic semi-conductor layer, said at least one first and at least one second OFET each including a gate, of which transistors said at least one first and one second OFET are each a p-type OFET, said at least one second OFET having an organic semi-conductor layer exhibiting a thickness sufficiently thin that reduces the conductivity of this layer so that said organic semiconductor layer serves as a resistor of such an increased value in the logic gate or, wherein, the at least one second OFET semi-conductor layer is treated to reduce its conductivity to a value that is equivalent of the conductivity of said sufficiently thin organic semiconductor layer such that the reduction in conductivity of the organic semi-conductor layer of said at least one second OFET and the corresponding increase in the resistance of said organic semi-conductor layer of said at least one second OFET due to the reduced conductivity is such that said at least one second OFET without a gate potential exhibits OFF currents that are approximately one order of magnitude lower than the ON currents of the first OFET so that said at least one second OFET is switched off by an applied positive gate potential and switched on by an applied negative gate potential.