US Patent No. 9,106,200


Patent No. 9,106,200
Issue Date August 11, 2015
Title Piezoelectric Vibrating Piece And Piezoelectric Device
Inventorship Takehiro Takahashi, Saitama (JP)
Shuichi Mizusawa, Saitama (JP)
Masakazu Harada, Saitama (JP)
Hiroaki Yamada, Saitama (JP)
Takumi Ariji, Saitama (JP)
Assignee NIHON DEMPA KOGYO CO., LTD., Tokyo (JP)

Claim of US Patent No. 9,106,200

1. A piezoelectric vibrating piece comprising:
an excitation unit in a rectangular shape including a first side and a second side, the first side extending in a first direction,
the second side extending in a second direction perpendicular to the first direction;

a framing portion that surrounds the excitation unit and has a space; and
a connecting portion that connects the first side of the excitation unit and the framing portion, the connecting portion having
a first thickness in a third direction perpendicular to the first direction and the second direction, wherein the excitation
unit includes a first region, a second region, and a third region, a pair of excitation electrodes are disposed on two main
surfaces of the first region, the second region includes at least a part of the first side, the second region with the first
thickness being directly connected to the connecting portion, the third region is disposed between the first region and the
second region, the third region is a region other than the first region and the second region, the third region has a second
thickness in the third direction, and a thickness of the second region in the third direction is thicker than the second thickness,
wherein the space of the framing portion is located at regions other than the connecting portion between the excitation unit
and the framing portion.