Crystal unit

Details Crystal unit Crystal unit

2007-11-20

2007-11-20

San Martin, J. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S330000, C310S365000, C331S158000, C331S068000

Reexamination Certificate

active

10713683

ABSTRACT:
A crystal unit has a crystal blank provided with a pair of excitation electrodes and a pair of extension electrodes extended from the excitation electrodes, and a casing having a recess. A pair of connection terminals is formed on the bottom face of the recess. An inclined surface is formed at one end of a first principal surface of the crystal blank and the second principal surface of the crystal blank is flat-shaped. A conductive material is disposed between the connection terminals and the extension electrodes so that the extension electrodes are extended toward the end at which the inclined surface is formed and the second principal surface faces the mounting member, and the crystal blank is thereby held by the mounting member at the position of the end at which the extension electrodes are extended and electrically connected to the connection terminals.

REFERENCES:
patent: 3796968 (1974-03-01), Luscher
patent: 4167686 (1979-09-01), Fukuyo
patent: 5585687 (1996-12-01), Wakabayashi et al.
patent: 6362561 (2002-03-01), Kuroda et al.
patent: 6452460 (2002-09-01), Oda
patent: 6859116 (2005-02-01), Nishimura et al.
patent: 2003/0020564 (2003-01-01), Nishimura et al.
patent: 2006/0175939 (2006-08-01), Murata
patent: 61-70425 (1986-05-01), None
patent: 2001-196886 (2001-07-01), None

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