Patent ID: 7423636

Claim:
A touch panel device comprising a transparent substrate, a touch area disposed at the middle portion of the substrate and transducers disposed at the edge portion of the touch area for exciting or receiving surface acoustic waves, wherein each of the transducers includes a piezoelectric thin film, a plate electrode disposed at one surface of the piezoelectric thin film and a comb-like electrode disposed at the other surface of the piezoelectric thin film, the comb-like electrode consisting of a plurality of comb-like electrode fingers and a linear bus electrode to which one end of each of the plural comb-like electrode fingers is connected, a plurality of wiring electrodes is provided at the outer side of the transducer in parallel with the bus electrode of the transducer and is connected to the plate electrode and the bus electrode of any of the transducers, and each of the wiring electrodes includes an electrode base portion formed by printing silver paste containing fine particles on the surface of the substrate and an electrode main body formed by printing silver paste containing large particles and fine particles in a mixed manner on the electrode base portion.