In order to form organic thin films on electrodes, a solution of a material
for the organic thin film is accurately printed via an ink-jet onto the
surface of microelectrodes as required, thereby producing a high density
array of microelectrodes. Further, a solution of a sample substance or a
liquid substance to be sensed is ejected into air via an ink-jet nozzle to
fall to the surface of organic thin membranes on the microelectrodes so
that the sample can be evaluated.
