Abstract
A film bulk acoustic resonator is formed on a substrate having a major surface. The film bulk acoustic resonator includes an elongated stack. The elongated stack includes a layer of piezoelectric material positioned between a first conductive layer deposited on a first surface of the layer of piezoelectric material, and a second conductive layer deposited on a second surface of the layer of piezoelectric material. The elongated stack is positioned substantially perpendicular with respect to the major surface of the substrate. The first and second conductive layers are placed on the layer of piezoelectric material substantially simultaneously and in one processing step. The major surface of the substrate is in a horizontal plane and the stack of the film bulk acoustic resonator is in a substantially vertical plane. The resonator structure formed may be used either as a resonator or a filter.
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