Surface mount crystal oscillator

Details Surface mount crystal oscillator Surface mount crystal oscillator

2007-08-14

2007-08-14

Chang, Joseph (Department: 2817)

Oscillators

With outer casing or housing

C331S10800D, C331S158000, C310S348000

Reexamination Certificate

active

11190748

ABSTRACT:
A surface mount quartz crystal oscillator includes: a quartz crystal unit having a plurality of first connection terminals on its bottom surface, and a mounting substrate formed with a depression, which accommodates an IC chip inside the depression. The side of the mounting substrate having the opening of the depression bonds with the bottom surface of the crystal unit. The IC chip integrates an oscillation circuit that employs the crystal unit and a temperature compensation circuit. Second connection terminals corresponding to the first connection terminals are provided on the upper surface of the frame wall that encloses the depression in the mounting substrate. A notched portion is formed in the frame wall, and resin is injected from this notched portion into the depression to fill at least the region between the first connection terminals.

REFERENCES:
patent: 7123108 (2006-10-01), Isimaru
patent: 2004/0085147 (2004-05-01), Harima et al.
patent: 2004/0174092 (2004-09-01), Iwata
patent: 2003-087056 (2003-03-01), None

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