| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface mount oscillator which is made as a junction type in which the size of an IC chip is increased, while maintaining high performance thereof, and the outer dimensions of the oscillator in plan view are small. Ž<P>SOLUTION: There is provided the surface mount crystal oscillator, constituted so that the surface of an IC chip 2 opposite one principal surface thereof on which IC terminals 8 are formed is fixed on a mount substrate 3, and external terminals 7 that includes a pair of crystal terminals and a pair of dummy terminals, at least one of which serves as a ground terminal that are formed in four-corner sections of an outer bottom surface of the surface mount vibrator 1, are electrically connected to the IC terminals 8 provided at four-corner sections of the one principal surface; and IC terminals 8 provided at positions other than the four-corner sections are connected to circuit terminals 10 of the mount substrate 3 by means of wire bonding, wherein the external terminals 7 of the surface mount vibrator 1, including the crystal terminals and the dummy terminals are electrically jointed, using jointing balls, to the IC terminals 8 that are formed in the four-corner sections of the IC chip 2. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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