Patent ID: 7029841

Claim:
A method of manufacturing a sensor device comprising a circuit having organic thin films formed on surface of microelectrodes forming a two-dimensional array and a transducing element that detects change in electric impedanace in connection with an electro-conductive polymer, the polymer absorbing aromatic molecules, the method comprising: printing a plurality of solutions of thin film materials through a plurality of ink-jet nozzles simultaneously onto the surfaces of the microelectrodes such that organic thin films are formed on the microelectrodes, wherein each of the plurality of solutions comprise an electro-conductive polymer and a solvent, the electro-conductive polymer being different for each of the plurality of solutions; the ink-jet nozzles each have a piezo-electric element, the ink-jet nozzles being formed in a multi-line head nozzle, and the solution has a viscosity of about 3 centipoise or less; the step of printing the solution of thin film material comprises the steps of: (a) deforming the piezo-elements by delivering an electric signal to the piezo-elements; (b) ejecting the solution via the ink-jet nozzles to rest on the microelectrodes, and (c) depositing the electro-conductive polymer onto different regions of the two-dimensional array to produce a device specific to a group of chemicals; and the electro-conductive polymer of each solution consists of at least one selected from the group consisting of, polythiophene, polymethylethiophene, and polyphenylene vinylene.