Surface mount crystal oscillator

Details Surface mount crystal oscillator Surface mount crystal oscillator

2009-12-08

2011-12-06

Chang, Joseph (Department: 2817)

Oscillators

With outer casing or housing

C331S069000, C331S158000, C310S340000, C310S348000

Reexamination Certificate

active

08072276

ABSTRACT:
There is provided a surface mount oscillator of a junction type in which the size of an IC chip is increased while maintaining high performance thereof, and the outer dimension of the oscillator in plan view are small. In a surface mount crystal oscillator which: a surface of an IC chip opposite to one principal surface thereof on which IC terminals are formed, is fixed on a mount substrate; external terminals that are constituted by a pair of crystal terminals and dummy terminals, at least one of which serves as a ground terminal, and that are formed in four corner sections of an outer bottom surface of a surface mount vibrator, are electrically connected to the IC terminals provided in four corner sections of the one principal surface; and IC terminals provided in positions other than the four corner sections are connected to circuit terminals of the mount substrate by means of wire bonding, the configuration is such that the external terminals of the surface mount vibrator constituted by the crystal terminals and the dummy terminals are electrically joined by means of joining balls to the IC terminals formed in the four corner sections of the IC chip.

REFERENCES:
patent: 7135810 (2006-11-01), Okajima
patent: 7446460 (2008-11-01), Yamamoto
patent: 2005/0093171 (2005-05-01), Sugiura
patent: 2006/0055479 (2006-03-01), Okazaki et al.
patent: 2007/0228892 (2007-10-01), Koyama et al.
patent: 2007/0252482 (2007-11-01), Sakai
patent: 2008-180012 (2004-06-01), None
patent: 2007-082113 (2007-03-01), None
patent: 2008-78778 (2008-04-01), None
patent: 2008-109429 (2008-05-01), None
Office Action issued by the Japanese Patent Office on Jan. 18, 2011 for the priority patent application No. JP2008-326682.

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