Piezoelectric device with irradiation damage preventing seal

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices

Reexamination Certificate

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Details

C310S344000

Reexamination Certificate

active

07876029

ABSTRACT:
A piezoelectric device includes: a piezoelectric resonator element; a package storing the piezoelectric resonator element therein in a manner to mount the piezoelectric resonator element on a base portion thereof composed of at least three layers that are layered; and a through hole penetrating through the base portion. In the device, the through hole includes a first hole formed on a first layer which is positioned to face the piezoelectric resonator element among the three layers; a second hole formed on a second layer contacting with the first layer; a third hole formed larger than the second hole on a third layer contacting with the second layer; and a metal coat formed on an inner wall surface of the second hole, and a sealing part for sealing the package is formed with a sealant in at least the second hole.

REFERENCES:
patent: 7060520 (2006-06-01), Kawauchi et al.
patent: 7279824 (2007-10-01), Tanaya et al.
patent: 2008/0211350 (2008-09-01), Tanaya et al.
patent: 2009/0267165 (2009-10-01), Okudo et al.
patent: 2010/0102678 (2010-04-01), Saita
patent: A-61-100998 (1986-05-01), None
patent: A-2002-009577 (2002-01-01), None
patent: A-2005-223612 (2005-08-01), None
patent: A-2005-244500 (2005-09-01), None

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