Seiko Epson Corporation

Epson Toyocom Corporation

Yoshiyuki Yamada

Hideo Tanaya

A vibrating piece substrate includes: a plurality of tuning-fork vibrating pieces each having a base portion, and vibration arm portions and support arm portions extending from the base portion; a frame portion; and a plurality of linking portions connecting the frame portion and the plurality of tuning-fork vibrating pieces, wherein the support arm portions extend in the same direction as the direction in which the vibration arm portions extend, and the support arm portions have a length smaller than the vibration arm portions, the tuning-fork vibrating pieces are arranged such that the vibration arm portions of adjacent tuning-fork vibrating pieces sandwich the region of a portion of the frame portion therebetween, measurement pads are formed in the region of the frame portion sandwiched between the vibration arm portions, and wiring lines are formed in the linking portions to provide electric conduction between the tuning-fork vibrating pieces and the measurement pads.

Vibrating piece substrate and tuning-fork vibrating piece

A flexural mode resonator element includes: a vibration arm extending from a base end toward a tip; a base joined to the vibration arm at the base end; and supporting arms arranged on both sides of the base in a width direction perpendicular to an extending direction of the vibration arm and joined to the base, wherein the base has a reduced cross-section portion disposed along the extending direction of the vibration arm between a joint portion with the vibration arm and a joint portion with the supporting arms, and the reduced cross-section portion is disposed so as to satisfy a relationship 2&#xd7;W&#x2266;L&#x2266;6&#xd7;Wwhere L is the length of the reduced cross-section portion in the extending direction of the vibration arm, and Wis the arm width of the vibration arm.

Flexural mode resonator element, resonating device, and electronic apparatus

A piezoelectric vibration piece includes a base made of a piezoelectric material; a plurality of vibration arms which is integrally formed with the base and extends in parallel; elongate grooves which are formed along longitudinal directions of the vibration arms; and excitation electrodes which include inner electrodes disposed in the elongate grooves and side electrodes disposed in side surfaces facing the inner electrodes, wherein widening portions in which the widths of the vibration arms are widened toward the base at a joint between the vibration arms of the base are formed, and the side electrodes are led to principal surfaces and side surfaces of the widening portions.

Piezoelectric vibration piece and piezoelectric device

A tuning fork resonator element that has a base portion, first and second resonating arms extending from the base portion in a first direction, and a support frame sandwiching the first and second resonating arms and being connected to the base portion includes: a first excitation electrode, formed in an area close to a connection portion with the base portion of the support frame, being connected to a mount electrode with a conductive adhesive; a second excitation electrode, formed in at least one of an area sandwiching the first and second resonating arms of the support frame and an area positioned farther than the first and second resonating arms in the first direction, being connected to a mount electrode with the conductive adhesive; and a cut portion of the support frame formed on an external surface of the support frame.

Tuning fork resonator element and tuning fork resonator

A tuning-fork-type piezoelectric resonator element and a tuning-fork-type piezoelectric resonator are provided. The tuning-fork-type piezoelectric resonator element comprises a piezoelectric resonator element body including base and resonating arms extending from one end of base. A support includes a short side connected to the base and a long side extending from one end of the short side along a longitudinal direction of the piezoelectric resonator element body. A mount is provided at the tip of the long side and at the short side.

Growing community of inventors

Minowa, Japan

Yoshiyuki Yamada