Patent ID: 7522006

Claim:
A surface mount crystal oscillator comprising: a package body comprised of laminated ceramic including a flat central layer, and a first and a second frame layer each having an opening and laminated on one of both surfaces of said central layer, said central including at least a first layer and a second layer laminated one on other; a crystal blank hermetically sealed in a first recess defined by said first layer and said first frame layer; an IC chip placed in a second recess defined by said central layer and said second frame layer, and having an oscillation circuit using said crystal blank integrated therein, and a shield electrode disposed on a laminated surface of said second layer with said first layer; a pair of crystal test terminals formed on an end face of said central layer; and conductive paths electrically connecting said crystal to said IC chip through crystal test terminals, wherein said conductive paths pass a laminated surface of said central layer with said first frame layer and a laminated surface of said central layer with said second flame layer.