Crystal oscillator

Details Crystal oscillator Crystal oscillator

1994-10-05

1997-01-21

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310361, 310346, 310351, 310370, H01L 4108

Patent

active

055962432

ABSTRACT:
The invention is a crystal oscillator having a vibrating plate comprising a vibrating part surrounded by a rim part spaced from the vibrating part except for a narrow connecting part that connects the vibrating part to the rim part in a cantilever fashion. The thickness of the vibrating part and the connecting part are less than the thickness of the rim part. The vibrating part is sandwiched between a pair of casings. Each of the casings has a recess facing the vibrating part, which prevent the vibrating part from contacting the casings. Each surface facing a recess has an electrode positioned thereon and an electrode lead extending from the surface electrode to the connecting part. Each casing has a through-hole positioned to face an electrical lead. A cup-shaped metal lead is placed in each through-hole with the bottom of the cup contacting the electrical lead facing the through-hole. Current to the surface electrodes is supplied through the metal leads.

REFERENCES:
patent: 4362961 (1982-12-01), Gerber
patent: 4421621 (1983-12-01), Fujii et al.
patent: 4445256 (1984-05-01), Huquenin et al.
patent: 4451754 (1984-05-01), Stolz et al.
patent: 4763078 (1988-08-01), Williams
patent: 5101669 (1992-04-01), Holm-Kennedy et al.

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