Patent ID: 8159115

Claim:
A stacked crystal resonator comprising: a framed crystal plate in which a frame section surrounds a resonating section having first and second exciting electrodes on both principle surfaces thereof, and said resonating section and said frame section are connected by first and second connecting sections; first and second metallic films which are respectively formed on the entire periphery of both of one principle surface and the other principle surface of said frame section, and to which conducting paths extending from said first and second exciting electrodes are connected via said first and second connecting sections; and a base and a cover which are stacked on both of the principle surfaces of said framed crystal plate, and the outer periphery section of which is joined with said frame section by a eutectic alloy so as to seal-enclose said resonating section; in which said first metallic film provided on the one principle surface of said framed crystal plate is electrically connected to one of a pair of mount terminals provided on one end side on the other principle surface, which is an opposite surface of one principle surface of said base, by a crystal plate end surface electrode formed in a cutaway section provided on the outer side surface of said framed crystal plate, and by a first base end surface electrode formed in a cutaway section provided on the outer side surface of said base; and said second metallic film provided on the other principle surface of said framed crystal plate is electrically connected to the other mount terminal provided on the other end side on the other principle surface of said base, by a third metallic film provided on the outer periphery of the one principle surface of said base, which joins with the framed crystal plate across its entire surface via said eutectic alloy, and by a second base end surface electrode which connects to said third metallic film and which is formed in a cutaway section provided on the outer side surface of said base, wherein; said crystal plate end surface electrode which is electrically connected to said first metallic film on the one principle surface of said framed crystal plate, is electrically connected to a crystal plate auxiliary electrode which is provided on the outer periphery of the cutaway section on the surface of the other principle surface of said framed crystal plate so as to be apart from said second metallic film, and said crystal plate auxiliary electrode faces and electrically connects via said eutectic alloy to a base auxiliary electrode provided on the one principle surface of said base; the width of the frame section of said framed crystal plate on one side on the one end side where said crystal plate auxiliary electrode is formed, differs from the width of the frame section at least on one other side; and on said conducting paths there is provided a blocking film which blocks flow of said eutectic alloy to said exciting electrodes.