Development of Organic Transistor by Tokyo University
The newly developed organic transistor has been manufactured by using special inkjet technology with sub femtoliter (fl)-class ultra trace droplet control. Using this sort of manufacturing process an organic transistor with a size of 2 micro meter wide Ag source/drain electrode line and with a 1 micro meter channel length can be manufactured. The volume of liquid discharge by nozzle of the inkjet is from 0.5 to 0.7fl and the diameter of each droplet is from 1 to 2 micro meters. The current method is an improvement to the existing inkjet technology capable of producing droplet of diameter sizes of 20 to 50 micro meters capable of several picoliters class droplet controls. Further the new method can lower the drive voltage to 3V which is less than one tenth of the voltage that is required by organic transistors based on the existing inkjet technologies. This has been achieved by reducing the thickness of the gate insulation film to 3nm according to the Tokyo University. The target application for sheet type devices made by new organic transistors are in artificial skin for medical and industrial use and pressure sensor mats for crime prevention as well as nursing care.
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