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US 2017/0366162 A1Published application
Quartz crystal resonator unit
AssigneeMurata Manufacturing Co., Ltd.
InventorsKazuyuki Noto, Hiroaki Kaida
Life of this patent
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Abstract
A quartz crystal resonator unit including a quartz crystal resonator having a quartz crystal blank, a frame surrounding an outer periphery of the quartz crystal blank, and coupling members connecting the frame to the quartz crystal blank. Moreover, a lid member and a base member are attached to the frame and seal the resonator. One or more outer electrodes is formed over end surfaces of the frame, the lid member, and the base member on a side where the coupling members are coupled. The one or more outer electrodes has a machinery quality factor smaller than that of the frame.
Claims20
A quartz crystal resonator unit comprising:
- a quartz crystal resonator including a quartz crystal blank having a first and second excitation electrodes disposed on first and second surfaces of the quartz crystal blank, respectively, a frame that surrounds an outer periphery of the quartz crystal blank, and a coupling member that couples the frame to the quartz crystal blank;
- a lid member disposed to face the first surface of the quartz crystal blank and coupled to an entire circumference of the frame;
- and
- a base member disposed to face the second surface of the quartz crystal blank and coupled to the entire circumference of the frame, such that the quartz crystal blank is disposed between the lid member and the base member;
- and
- a plurality of outer electrodes that are electrically connectable to an external unit, the plurality of outer electrodes being disposed on an outer surface of the base member opposite a surface of the base member facing the quartz crystal resonator,
- wherein a first outer electrode of the plurality of outer electrodes is electrically connected to the first excitation electrode and a second outer electrode of the plurality of outer electrodes is electrically connected to the second excitation electrode,
- wherein at least one of the first and second outer electrodes extends over respective end surfaces of the frame, the lid member, and the base member on a side of the quartz crystal resonator unit where the coupling member is disposed, the at least one first or second outer electrode having a machinery quality factor Qm smaller than a machinery quality factor of the frame,
- wherein a connection electrode is disposed on a surface of the frame and is electrically connected to either the first or second excitation electrode, and
- wherein the connection electrode extends to an outer edge of the frame and is connected to the at least one first or second outer electrode that extends over the end surfaces of the frame, the lid member, and the base member.
7 more elements
A quartz crystal resonator unit comprising:
- a quartz crystal resonator including a quartz crystal blank with first and second excitation electrodes disposed on opposing surfaces of the quartz crystal blank, a frame that surrounds an outer periphery of the quartz crystal blank, and first and second coupling members that couple the frame to the quartz crystal blank;
- a lid member and a base member each coupled to an entire circumference of the frame, such that the quartz crystal blank is disposed between the lid member and the base member;
- and
- a plurality of outer electrodes disposed on an outer surface of at least one of the base member and the lid member,
- wherein a first outer electrode of the plurality of outer electrodes is electrically connected to the first excitation electrode via the first coupling member and a second outer electrode of the plurality of outer electrodes is electrically connected to the second excitation electrode via the second coupling member,
- wherein at least one of the first and second outer electrodes is coupled to the respective first or second excitation electrodes by a connection electrode that extends to an outer edge of the frame on a side of the quartz crystal resonator to connect the at least one first or second outer electrode to the respective first or second excitation electrodes via the respective coupling member.
3 more elements
Dependencies are inferred from the claim text.