Knobbe Martens Olson & Bear LLP
GT-cut quartz crystal resonator
A GT-cut crystal resonator that can be provided with a support portion having a small and simple configuration without adverse effect on vibration characteristics includes: a crystal plate formed in an elliptical shape with a major axis and a minor axis respectively corresponding to vibration directions of two longitudinal vibration modes orthogonal to each other in a GT-cut; and a support portion that supports the crystal plate, the support portion being connected to a position on an outer periphery of the crystal plate where a minimum vibration displacement is obtained when the two longitudinal vibration modes are coupled.
Nihon Dempa Kogyo Co., Ltd.
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Takashi Hiroaki
Yamaguchi Yamada