Surface mount type crystal oscillator

Details Surface mount type crystal oscillator Surface mount type crystal oscillator

2006-11-30

2009-10-13

Chu, Chris C (Department: 2815)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S340000, C310S344000, C310S345000, C331S068000, C331S158000, C029S594000

Reexamination Certificate

active

07602107

ABSTRACT:
A surface mount crystal oscillator comprises a crystal blank, an IC chip having an oscillation circuit integrated thereon, and a hermetic package for accommodating the crystal blank and IC chip therein. The hermetic package comprises a substantially rectangular ceramic substrate formed with a metal film which makes a round on one main surface thereof, and a concave metal cover having an open end face bonded to the metal film. The IC chip is secured to the one main surface of the ceramic substrate through ultrasonic thermo-compression bonding using bumps, the crystal blank is disposed above the IC chip, and the ceramic substrate has the one main surface formed as a flat surface.

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