| 摘要 |
Disclosed are methods for producing a tuning-fork type crystal vibrating piece having neither a bump nor a groove at the root area of a pair of vibrating arms and for producing a crystal oscillation device. The method for producing a tuning-fork type crystal vibrating piece relates to a crystal tuning fork comprising a basal portion, a first vibrating arm, and a second vibrating arm, wherein both arms extend from the basal portion. The method for producing a crystal tuning fork comprises forming a first metallic film into a shape including the contours of the basal portion, the first vibrating arm and second vibrating arm on a first surface of a quartz wafer; and forming a second metallic film on the second surface opposite to the first surface of the quartz wafer into a shape covering at least a part of the basal portion between the first vibrating arm and second vibrating arm.
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