Abstract: The invention provides a piezoelectric bar resonator of small dimensions operating in the thickness shear mode and employing a minimum of separate and distinct elements. The resonating element 1 and its support 2 are blanked from a thin slab of piezoelectric material in a manner to provide a single piece of which the central portion forms the bar resonator and the peripheral portion constitutes a frame-work support. The two portions remain attached at at least one end of the bar. Planar or flattened cap type cover members 8 are fixed to frame 2. The invention may be applied where piezoelectric bar resonators of extremely small dimensions are required.

Abstract: An electronic component comprising at least one piezoelectric resonator and a process for mass production thereof include the superpositioning of n (n.gtoreq.1) layers having one or several cut outs defining m (m.gtoreq.1) resonating elements. Such layers are separated by n-1 intermediate layers in which are provided openings forming frames for the resonating elements. Two terminal layers providing covers in which are arranged blind cavities corresponding to the frames cover the assembly. The resonating elements are provided with electrodes and the layers are fixed to one another by welding together of metallization layers. The component may be used as an individual resonator or as a multiple channel filter.