Patent ID: 7123108

Claim:
A crystal oscillator comprising: a package body having a bottom wall and a first frame wall laminated on said bottom wall, said first frame wall having a central opening; a crystal unit accommodated in a recess formed in said package body including said central opening; an IC chip accommodated in said recess and having at least an oscillator circuit connected to said crystal blank; and a cover for enclosing said recess to hermetically encapsulate said crystal blank and said IC chip within said recess; wherein a notch portion is partially cut into an outer periphery of said first frame wall, and a terminal formed on a portion of a top of said bottom wall is exposed in said notch portion; and wherein said terminal comprises a pair of testing terminals, and said crystal oscillator further comprises a pair of crystal terminals disposed on the top of said bottom wall such that said crystal blank is bonded thereto, said crystal terminals extending to an outer periphery of said bottom wall to provide said testing crystal terminals.