PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD OF THE SAME

• Main Authors: TESHIMA, Yoshiro, WATANABE, Tetsuya, OSAWA, Kazuhiko, OHTSUKA, Takahiro, HIROTA, Kazuhiro
• Format: Patent
• Language: English
• Published: 18.08.2022
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

A piezoelectric device includes a conductive adhesive, a container, and an AT-cut crystal element. The AT-cut crystal element has at least one side surface intersecting with a Z′-axis of the crystallographic axis of the crystal constituted of three surfaces. When a dimension of a straight-line portion along the Z′-axis of a second side opposed to the first side is expressed as W1 and a dimension along the Z′-axis of the AT-cut crystal element is expressed as W0, W1/W0 is 0.91 or greater, and the straight-line portion has both sides constituting corner portions in approximately right angles with sides along an X-axis of the crystal of the AT-cut crystal element. The side of the first side is at a −X-side in an X-axis of the crystallographic axis of the crystal and a side of the second side is at a +X-side in the X-axis.