I recently read a paper in which interdigital transducer is used as the electrode for voltage measurement. It sandwiched between a piezoresistor and the substrate. From my understanding, the transducer converts the electrical signal to mechanical deformation, the piezoreisitor convert mechanical signal to electrical signal. While in the design, they use the piezoresistor to measure the deformation of the substrate which is subject to stress. So I was wondering why the interdigital transducer is included. The paper I was mentioning is "INKJET PRINTING OF CARBON NANOTUBE-POLYIMIDE NANOCOMPOSITE STRAIN SENSOR". Thanks!
http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2602755
In my opinion, the author has tried to measure the stress which is in the form of mechanical deformation and convert it to an electrical signal through the IDT. Certainly, the use of IDT is quite obvious if this is the situation to tackle. But to get a clear idea I need to go through the paper.
Hi,
In my opinion, they only use the IDT architecture for the film resistivity measurement. Therefore it seems to be only InterDigital electrodes and not transducers...
hope it helps
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