Mesa-type quartz-crystal vibrating piece and quartz crystal device

摘要

A mesa-type quartz-crystal vibrating piece includes a vibrator in a quadrangular shape with both main surfaces, a pair of excitation electrodes on both the main surfaces, a thin portion outside of the quadrangular shape, and a pair of extraction electrodes. The thin portion has a thickness thinner than a thickness of the vibrator. The pair of extraction electrodes are extracted from the excitation electrodes to a predetermined direction. A center of a first length in the predetermined direction of the excitation electrode is decentered from a center of a second length in the predetermined direction. The second length includes a length of the vibrator and a length of the thin portion. The center of the first length is decentered toward an opposite side of the extraction electrode by 25 μm to 65 μm.

主权项

1. A mesa-type quartz-crystal vibrating piece, comprising:
a vibrator, being in a quadrangular shape with both main surfaces; a pair of excitation electrodes, disposed on both the main surfaces; a thin portion, being outside of the quadrangular shape, the thin portion having a thickness thinner than a thickness of the vibrator; and a pair of extraction electrodes, extracted from the excitation electrodes to a predetermined direction, wherein, a center of a first length in the predetermined direction of the excitation electrode is decentered from a center of a second length in the predetermined direction, the second length including a length of the vibrator and a length of the thin portion, the center of the first length being decentered toward an opposite side of the extraction electrode by 25 μm to 65 μm.