Patent ID: 8446225

Claim:
A surface mounted oven controlled crystal oscillator comprising a crystal oscillator shell, a crystal oscillation circuit, several functional pins, and a base plate, the crystal oscillation circuit being accommodated in a cavity that is formed by the crystal oscillator shell and the base plated and electrically connecting with the functional pins, the functional pins drilling through the base plate from the cavity, and an insulating layer being formed between each functional pin and the base plate, wherein the surface mounted oven controlled crystal oscillator further comprises several pads formed at an outer surface of the base pate, the insulating layer is also formed between each pad and the base plate, one portion of the pad is embedded in the insulating layer, and the functional pins are electrically connected with the corresponding pads respectively; wherein the functional pin comprises a first pin, a protrusion portion and a second pin, one end of the first pin is electrically connected with the crystal oscillation circuit, and the other end is electrically connected with the protrusion portion; a portion of the protrusion portion is formed at an inner surface of the base plate, a portion of the protrusion portion is embedded in the insulating layer; the second pin is embedded in the insulating layer, and one end of the second pin is electrically connected with the protrusion portion, the other end of the second pin is electrically connected with the pad.