Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-08-01
2000-05-09
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313B, H01L 4108
Patent
active
060608129
ABSTRACT:
An ultrasonic touch-position sensing device comprising a piezoelectric substrate, an input interdigital transducer T formed at the middle of a lower end surface of the piezoelectric substrate, four output interdigital transducers R.sub.1, R.sub.2, R.sub.3 and R.sub.4, a nonpiezoelectric plate, and a signal controller connected with output terminals of the output interdigital transducers. The interdigital transducers R.sub.1 and R.sub.2, are formed at one edge of the lower end surface of the piezoelectric substrate, and the interdigital transducers R.sub.3 and R.sub.4, are formed at the other edge thereof. Each output interdigital transducer is placed such that the finger direction thereof is slanting to that of the interdigital transducer T. A lower end surface of the nonpiezoelectric plate is cemented on an upper end surface of the piezoelectric substrate, causing a bilayer assembly. An upper end surface of the nonpiezoelectric plate consists of four areas S.sub.1, S.sub.2, S.sub.3 and S.sub.4. When an electric signal is applied to the interdigital transducer T, an SH wave is excited in the bilayer assembly. The SH wave is transduced to an electric signal by each output interdigital transducer, the electric signal being not delivered at each output interdigital transducer.
REFERENCES:
patent: 5838088 (1998-11-01), Toda
patent: 5850118 (1998-12-01), Toda
patent: 5886452 (1999-03-01), Toda
patent: 5973438 (1999-10-01), Toda
patent: 5994817 (1999-11-01), Toda
patent: 6005327 (1999-12-01), Toda
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