The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2021
Filed:
Nov. 04, 2016
Piezo Studio Inc., Sendai, JP;
Tohoku University, Sendai, JP;
Akira Yoshikawa, Sendai, JP;
Yuji Ohashi, Sendai, JP;
Yuui Yokota, Sendai, JP;
Kei Kamada, Sendai, JP;
Masatoshi Ito, Sendai, JP;
Kenji Inoue, Sendai, JP;
Hiroyuki Amano, Sendai, JP;
PIEZO STUDIO INC., Miyagi, JP;
TOHOKU UNIVERSITY, Miyagi, JP;
Abstract
To provide a vibrator made of a piezoelectric crystal having a larger electromechanical coupling coefficient and a more satisfactory frequency-temperature characteristic than those of quartz, a vibrating piece () is made of a CaTa(GaAl)SiOsingle crystal (0<x≤1). In the single crystal, letting θ be a rotation angle from an X-Z plane about an X-axis serving as a rotation axis, 18x+17.5≤θ≤24x+24.5 is set. In addition, the vibrating piece () is made of a CaNb(GaAl)SiOsingle crystal (0<x≤1). In the single crystal of this arrangement, letting θ be a rotation angle from an X-Z plane about an X-axis serving as a rotation axis, 25x+23.083≤θ≤32x+26.167 is set.