| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0051]FIG. 1 is a schematic cross sectional view of an example of thin film piezoelectric resonator to be used in a filter circuit according to the invention as realized by using a ferroelectric member and adapted to utilize a bulk acoustic wave. [0052]FIG. 2 is a schematic cross sectional view of another example of thin film piezoelectric resonator to be used in
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