Surface mount type crystal oscillator

Details Surface mount type crystal oscillator Surface mount type crystal oscillator

2011-04-26

2011-04-26

Chu, Chris (Department: 2815)

Oscillators

With outer casing or housing

C331S158000, C257SE23044, C257S778000, C361S728000, C310S340000, C310S348000

Reexamination Certificate

active

07932786

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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