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. 11, 2013
Filed:
Sep. 12, 2008
Akiko Katoh, Tokorozawa, JP;
Akiko Katoh, Tokorozawa, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a crystal oscillator piece in which the cross section of its vibrating tine, while not symmetrical in shape, has a principal axis that is oriented parallel to an X axis to suppress the generation of leakage vibration, and a method for manufacturing such a crystal oscillator piece. More specifically, the invention provides a crystal oscillator piece includes a vibrating tine having an upper surface, a lower surface having a larger width than the upper surface, a first side face, and a second side face, and a balance adjusting groove formed in the vibrating tine, wherein the first and second side faces are formed in sloping fashion so that the width of the vibrating tine gradually increases from the upper surface toward the lower surface, and the balance adjusting groove is formed in accordance with the sloping of the first and second side faces so that at least one of two dynamically perpendicular principal axes passing through a centroid on a cross section taken perpendicularly to a longitudinal direction of the vibrating tine becomes substantially parallel to the upper surface or the lower surface. The invention also provides a method for manufacturing such a crystal oscillator piece.