Surface mount crystal oscillator

Details Surface mount crystal oscillator Surface mount crystal oscillator

2005-09-13

2008-03-04

Martin, J. San (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C331S158000

Reexamination Certificate

active

07339309

ABSTRACT:
In a crystal oscillator having a crystal blank, and an IC chip having integrated therein an oscillation circuit, the crystal blank has a first excitation electrode disposed on its first principal surface, and an extension electrode extended from the first excitation electrode to a peripheral region of the crystal blank, and folded back to the second principal surface. A first and a second crystal connection terminal are disposed on a first principal surface of the IC chip, and the second crystal connection terminal extends to a central region on the first principal surface of the IC chip to constitute a second excitation electrode. The extension electrode is secured to the first crystal connection terminal through a bump, such that the second principal surface of the crystal blank opposes the first principal surface of the IC chip, thereby holding the crystal blank in parallel with the first principal surface of the IC chip. The crystal blank is excited by the first and the second excitation electrodes.

REFERENCES:
patent: 11-145728 (1999-05-01), None
patent: 2000-196360 (2000-07-01), None
patent: 2001-028516 (2001-01-01), None
patent: 2004-040693 (2004-02-01), None
patent: 2004128528 (2004-04-01), None
patent: 2005311769 (2005-11-01), None

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