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:
Feb. 15, 2011
Filed:
Jul. 05, 2006
Shuichi Oka, Kanagawa, JP;
Terukazu Ohno, Kanagawa, JP;
Shuichi Oka, Kanagawa, JP;
Terukazu Ohno, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An object is to provide a film bulk acoustic resonator capable of improving resonant characteristics by reducing the generation of a standing wave to be caused by a transverse-mode acoustic wave to a minimum. In a film bulk acoustic resonator including a resonant portion A having a piezoelectric material layersandwiched between a first electrodeand a second electrode, the resonant portion A is configured to have a planar shape that is an ellipse having a part thereof cut off along a straight line L. The straight line L intersects at least one of a minor axis and a major axis of the ellipse, and preferably intersects both the minor axis and the major axis, and passes through the center of the ellipse.