Patent ID: 6229404
Filing Date: 2001-05-08
Classification: H01L,H03B,H03H,H05K

Abstract:
A crystal oscillator comprising:an insulating main body having a top surface, a bottom surface, and a side surface, the insulating main body being formed with:an upper space in an upper portion thereof, a first inner wall defining the upper space, the first inner wall provided with first electrode pads; anda lower space in a lower portion thereof, a second inner wall defining the lower space, the second inner wall provided with second electrode pads;a crystal oscillating element disposed in the upper space, electrically connected with the first electrode pads;an IC chip disposed in the lower space, electrically connected with the second electrode pads for compensating the temperature-frequency variation characteristic of the crystal oscillating element;IC control terminal electrodes provided on a side of the insulating main body, both upper and lower ends of the IC control terminal electrodes spaced apart from the top and bottom surfaces of the insulating main body electrically connectable with the second electrode pads;external terminal electrodes disposed on the bottom surface of the insulating main body, connectable with a wiring conductor of a printed circuit;a cover provided on the top surface of the insulating main body for hermetically sealing the upper space; anda conductive path disposed within the main body for connecting the first electrode pads with the second electrode pads, the conductive path including a first via hole connected with the first electrode pads and extending in a depth direction along a first line, a second via hole conductor connected with the second electrode pads and extending in a depth direction along a second line offset from the first line, and an internal wiring conductor extending along a width of the main body connecting the first via hole conductor and the second via hole conductor.