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Piezoelectric resonator in a small-sized package

A piezoelectric resonator and vibrating arm technology, applied in the field of piezoelectric resonators, can solve problems such as cover sinking

Active Publication Date: 2012-10-10
ETA SA MFG HORLOGERE SUISSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many cases, atmospheric pressure is sufficient to cause severe subsidence of the cover

Method used

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  • Piezoelectric resonator in a small-sized package
  • Piezoelectric resonator in a small-sized package
  • Piezoelectric resonator in a small-sized package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] In the embodiment shown in Figures 3a and 3b, the resonator according to the invention, designated by reference numeral 110, comprises a tuning-fork-like part having two vibrating arms 112 and 114 connected by a connection 116, A central connecting arm 118 located between the arms 112 and 114 and parallel to said arms is connected to this connecting portion 116 . The entire assembly is made from a single piece of quartz.

[0019] As shown in FIG. 3 a , the central arm 118 is slightly longer than the vibrating arms 112 and 114 . The distal end of the central arm widens to a base 162 extending beyond the vibrating arm. The base 162 is used to secure the resonator 110 to the bottom of its package and to electrically connect the drive electrodes (not shown) of the resonator to conductive posts or bumps 178 and 180 formed inside the package.

[0020] The distal end of each of the vibrating arms 112 and 114 widens into a flipper (166 and 168, respectively) that is nearly tw...

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PUM

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Abstract

The packaged piezoelectric resonator comprises a case (170; 270) with a lid (140; 240) and a piezoelectric resonator element (110) housed in said case, The piezoelectric resonator element includes a planar tuning-fork-shaped part with two parallel vibrating arms (112, 114), and an additional attachment arm (118) intended for fixing the resonator element (110) to the bottom (172) of the case (170). The inside surface of the lid (140, 240) is stepped in such a way as to form a first portion (142) where the lid has a first thickness and a second portion (144) where the lid has a second thickness substantially greater than the first thickness, the first portion (142) extending at least over distal end portions (166, 168) of the vibrating arms (112, 114), and the second portion (144) extending at least over a part of the attachment arm (118).

Description

[0001] This application is a divisional application of an invention patent application with an application date of December 12, 2008, an application number of 200810189564.9, and an invention title of "small-sized packaged piezoelectric resonator". technical field [0002] The present invention relates to a packaged piezoelectric resonator, or in other words, to a device consisting of a piezoelectric resonator and a case housing the piezoelectric resonator. More specifically, the present invention relates to small-sized packaged piezoelectric resonators, which are most commonly used in the manufacture of frequency generators, which are especially used in various fields such as horology, information technology, telecommunications, and medical fields. Portable Electronic Devices. Background technique [0003] Such a small-sized packaged resonator is already disclosed in prior art document US7,084,556 filed in the name of the assignee, which document is hereby incorporated by r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H9/21H03H9/10
CPCH03H9/21H03H9/1021
Inventor S·达拉皮亚扎
Owner ETA SA MFG HORLOGERE SUISSE