Elastic surface wave device and method for making the same

An elastic surface wave device comprising a resin having embedded therein a unitary body comprising:

• a piezoelectric plate;
• a transmitting interdigital transducer and a receiving interdigital transducer, both transducers being attached to one major surface of the piezoelectric plate, which unitary body is attached to a unitary supporting substrate via double adhesive layers, one of which is composed of one kind of adhesive resin and the other of which is composed of another kind of resin, different from the former in ultrasonic property, each of the transducers comprising a pair of electrodes facing each other, a wave propagation surface for an elastic surface wave being thereby defined on the major surface of the piezoelectric plate between the transducers;
• and two pairs of electrical leads, one pair of which are respectively connected to the pair of electrodes of the transmitting transducer and the other pair of which are respectively connected to the pair of electrodes of the receiving transducer, all of said electrical leads being out of contact with the wave propagation surface.