Composite part of piezo-electric resonator and condenser and method of producing same

Claim 1

A composite part of a piezo-electric resonator and a condenser, characterized by that said condenser comprising a dielectric substrate provided with a common electrode on one side thereof and an output electrode on another side thereof and said piezo-electric resonator comprising a piezo-electric substrate provided with opposite electrodes on both sides thereof are fixedly integrated under the condition that a gap, which serves as a vibration space, is formed between a face of said condenser and a face of said piezo-electric resonator facing said face of said condenser, said fixedly integrated condenser and piezo-electric resonator being provided with an end electrode at each end portion thereof form a composite element, said composite element being housed in a housing, and said housing being provided with lead terminals connected with said both end electrodes and said common electrode.

Claim 6

A method of producing a composite part of a piezo-electric resonator and a condenser, comprising the steps of: forming a common electrode on one lonitudinally extending face of a dielectic mother substrate; forming an output-input electrode on a face of the dielectric mother substrate opposite the one longitudinally extending face; forming electrodes on opposite faces of a piezo-electric mother substrate; integrating the mother substrates with one of the opposite faces of the dielectric mother substrate opposing one of the opposite faces of the piezo-electric mother substrate and a gap serving as a vibration space being formed between the opposing faces; after said step of integrating, forming end electrodes on longitudinally opposite edges of the integrated mother substrates so at to be electrically connected to the input-output electrode and the electrodes on the opposite faces of the piezo-electric mother substrate; after said step of forming end electrodes, cutting through the integrated mother substrates and end electrodes in a direction transverse to the longitudinal direction so as to obtain a plurality of composite elements, each consisting of a condenser and a piezo-electric resonator; housing each composite element in a respective resin case provided with lead terminals, and connecting the end electrodes and the common electrode with corresponding ones of the lead terminals; and after said step of housing, hermetically sealing openings in the case.

Claim 7

A method of producing a composite part of a piezo-electric resonator and a condenser, comprising the steps of: forming a common electrode on one lonitudinally extending face of a dielectic mother substrate; forming an output-input electrode on a face of the dielectric mother substrate opposite the one longitudinally extending face; forming electrodes on opposite faces of a piezo-electric mother substrate; integrating the mother substrates with one of the opposite faces of the dielectric mother substrate opposing one of the opposite faces of the piezo-electric mother substrate and a gap serving as a vibration space being formed between the opposing faces; after said step of integrating, forming end electrodes on longitudinally opposite edges of the integrated mother substrates so at to be electrically connected to the input-output electrode and the electrodes on the opposite faces of the piezo-electric mother substrate; after said step of forming end electrodes, cutting through the integrated mother substrates and end electrodes in a direction transverse to the longitudinal direction so as to obtain a plurality of composite elements, each consisting of a condenser and a piezo-electric resonator; housing each composite element in a respective resin case provided with lead terminals, and connecting the end electrodes and the common electrode with corresponding ones of the lead terminals; and after said step of housing, hermetically sealing openings in the case.