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:
Apr. 09, 2002
Filed:
Sep. 21, 2000
Abstract
A piezoelectric device operable to excite a thickness extensional third harmonic vibration is provided, which can realize a high performance oscillator with an excellent thermal stability. The piezoelectric device includes a piezoelectric substrate. The piezoelectric substrate is formed from a piezoelectric material containing as major components Sr, Bi, Nb, and O. Vibration electrodes are formed on both of the surfaces of the piezoelectric substrate. The range lying between the vibration electrodes and defined by the overlapped vibration electrodes constitutes an energy trapping range. The value L/t is set to be less than 9, in which L represents the length of the longest secant extending between intersections on the periphery of the energy confining region and t represents the distance between the vibration electrodes.