Patent ID: 8089202

Claim:
A piezoelectric vibrating reed having two arms extensive in parallel and having proximal ends connected to a base, each arm having opposite principal surfaces and opposite side surfaces, and each principal surface being formed with a groove elongated in a direction of the arm, the piezo electric vibrating reed comprising: a principal electrode layered at least in part on a respective principal surface and elongated in the direction of the arm, wherein the principal electrode has at least a first section and a second section defined along its length from a side of the proximal end, and the first section has a width narrower in a plane view than that of the second section; and a side electrode layered at least in part on a respective side surface and extensive to cover peripheries of the principal surfaces continuous from the respective side surface, wherein the side electrode layered on at least one of the side surfaces of a respective arm has a wide section extensive at least partially along the first section of the principal electrode so as to cover the periphery of a respective principal surface widely in the plain view than the other section of the side electrode, taking advantage of the narrower width of the first section of the principal electrode.