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. 21, 2015
Filed:
Mar. 25, 2013
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Osamu Ishii, Tatsuno, JP;
Takao Morita, Fujisawa, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 5/32 (2006.01); H01L 41/047 (2006.01); H03H 9/17 (2006.01); H03H 9/02 (2006.01);
U.S. Cl.
CPC ...
H01L 41/047 (2013.01); H03B 5/32 (2013.01); H03H 9/17 (2013.01); H03H 9/02157 (2013.01);
Abstract
A resonator element includes a substrate vibrating in a thickness-shear vibration mode, a first excitation electrode disposed on one principal surface of the substrate, and has a shape obtained by cutting out four corners of a quadrangle, and a second excitation electrode disposed on the other principal surface of the substrate, and a ratio (S/S) between the area Sof the quadrangle and the area Sof the first excitation electrode fulfills 87.7%≦(S/S)<95.0%.