Piezoelectric vibrating piece, piezoelectric vibrator, oscillator, electronic device, and radio-controlled timepiece
There is provided a piezoelectric vibrating piece including: a piezoelectric plate that includes a pair of vibrating arm portions, and a base portion which integrally fixes the base end portions of the pair of vibrating arm portions along a length direction; excitation electrodes which are formed on the vibrating arm portions and vibrate the vibrating arm portions; mounting electrodes which are formed on the base portion and mount the piezoelectric plate on external portions using a joining member; and leading-out electrodes which connect the excitation electrodes and the mounting electrodes, in which the leading-out electrodes are formed by folding back several times between the excitation electrodes and the mounting electrodes.
1. A piezoelectric vibrating piece comprising:
a piezoelectric plate that includes a pair of vibrating arm portions, and a base portion that integrally connects base ends of the pair of vibrating arm portions along a length direction;
excitation electrodes on the vibrating arm portions and configured to vibrate the vibrating arm portions;
mounting electrodes on the base portion including a joining member that connects the piezoelectric plate to lead terminals; and
lead-out electrodes connecting the excitation electrodes and the mounting electrodes,
wherein the lead-out electrodes are configured in a serpentine pattern between the excitation electrodes and the mounting electrodes.
2. The piezoelectric vibrating piece according to claim 1 , wherein the piezoelectric plate includes a cut-out portion in a periphery of the piezoelectric plate in a thickness direction of the piezoelectric plate, and wherein the lead-out electrodes are configured on an inner surface of the cut-out portion.
3. The piezoelectric vibrating piece according to claim 1 , wherein the mounting electrodes comprise gold, and the joining member comprises solder.
4. A piezoelectric vibrator including the piezoelectric vibrating piece according to claim 1 , wherein the mounting electrodes of the piezoelectric vibrating piece are mounted on a package by the lead terminals.
5. An oscillator including the piezoelectric vibrator according to claim 4 electrically connected to an integrated circuit as an oscillating piece.
6. An electronic device including the piezoelectric vibrator according to claim 4 electrically connected to a counter portion.
7. A radio-controlled timepiece including the piezoelectric vibrator according to claim 4 electrically connected to a filter portion.