Quartz-crystal unit
AssigneeNihon Dempa Kogyo Co., Ltd.
InventorsKatsunori Akane, Kiyoharu Matsuo
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Abstract
A quartz-crystal unit comprises a container body having a recess, a quartz-crystal blank having a pair of excitation electrodes respectively disposed on one and the other principal surfaces, and a pair of extending electrodes respectively extended from the pair of excitation electrodes, and a cover for sealing an opening plane of the recess. The extending electrodes are led to both sides of one end of the crystal blank, and the one end is secured by a conductive adhesive to hold the crystal blank in the recess in parallel to the cover. The crystal unit satisfies 0<d/L<0.64, where L is the length from the one end to the other end opposing the one end in the crystal blank, and d is a gap between mutually opposing surfaces of the crystal blank and the cover.
Claims8
A crystal unit comprising:
- a container body having a recess;
- a crystal blank having a pair of excitation electrodes respectively disposed on one and the other principal surfaces, and a pair of extending electrodes respectively extended from said pair of excitation electrodes;
- and
- a cover for sealing an opening plane of said recess, wherein:
- said extending electrodes are led to both sides of one end of said crystal blank;
- said one end is secured by a conductive adhesive to hold said crystal blank in said recess in parallel to said cover;
- and
- said crystal unit satisfies 0<d/L<0.064, where L is the length from said one end to the other end opposing said one end in said crystal blank, and d is a gap between mutually opposing surfaces of said crystal blank and said cover.
Dependencies are inferred from the claim text.