Double thickness mode energy trapped piezoelectric resonating device

Claim 1

A piezoelectric resonating device of the double thickness vibration mode trapped energy type, said device comprising: a piezoelectric plate having a front face and an opposite back face; an input electrode and an output electrode on said front face, each one of said electrodes comprising a plurality of electrically interconnected electrode segments, said electrode segments being arranged to follow one another generally along one direction of said front face, said input and output electrode segments being aligned and interleaved with one another such that each input electrode segment is adjacent to at least one output electrode segment; a common ground electrode located on said back face of said plate and juxtaposed to said input and output electrodes; and an input terminal and an output terminal located adjacent one edge of said plate, interconnection means for electrically interconnecting said input electrode segments to said input terminal and said output electrode segments to said output electrode, portions of said interconnecting means which contact said input electrode segments extending generally in an opposite direction to another portion of said interconnecting means which is used for contacting said output segments.