Piezoelectric vibrating element and piezoelectric vibrator

Details Piezoelectric vibrating element and piezoelectric vibrator Piezoelectric vibrating element and piezoelectric vibrator

2008-04-29

2008-04-29

San Martin, J. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S365000

Reexamination Certificate

active

07365477

ABSTRACT:
A piezoelectric vibrating element that includes: a main vibrating unit vibrating in a constant direction, an exciting electrode being formed on a top face and a bottom face of the main vibrating unit; an open end formed on at least one of a plurality of ends provided in a vibrating direction of the main vibrating unit; an outer frame unit formed so as to surround the main vibrating unit; a connecting unit formed so as to connect the main vibrating unit and the outer frame unit, wherein the connection unit is provided between the main vibrating unit and the outer frame unit except an area where the open end is formed, and is composed of a recess concave to a top face of the main vibrating unit and a flat part approximately in parallel with the top face of the main vibrating unit; and a connecting electrode formed in a manner of starting from the exciting electrode, passing at least through the top face of the flat part, to the top face of the outer frame unit, wherein an angle θ1that makes the top face of the flat part with respect to a connecting face to which the flat part and the outer frame unit are connected, and an angle θ2that makes the top face of the outer frame unit with respect to the connecting face satisfy a relation: 90°<θ1<270° and 90°<θ2≦180°.

REFERENCES:
patent: 4656707 (1987-04-01), Berte et al.
patent: A-0191479 (1986-08-01), None
patent: A-61003514 (1986-05-01), None
patent: A 07-212171 (1995-08-01), None
patent: A 09-027729 (1997-01-01), None

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