PURPOSE: To obtain a quartz oscillator which is free from an effet of humidity and also from the fluctuation of oscillating frequency, by enclosing a trimmer capacitor into the depressed part of an airtight terminal of a sealing container by means of a molding material.
CONSTITUTION: A sealing container 1 contains an airtight terminal 3 having plural leads fixed airtightly by means of the airtight glass 2 and a can 4 which is adhered airtightly to the terminal 3. The terminal 3 contains a depressed part 3a where the circumferences of plural leads are opened outward, and an integrated circuit element 16 is bonded on the upper surface of the part 3a. A quartz oscillator 9 is bonded with conduction to an end of each of leads 5 and 6 with holding springs 7 and 8 and oscillated by an oscillating circuit of the element 16. The signal is divided by a frequency dividing circuit. A wiring substrate 17 is enclosed into the part 3a by means of a molding material 18, and a conductor layer 19, a dielectric substance layer 20 and a conductor layer 21 are formed on the substrate 17. Thus a trimmer capacitor is constituted. The gap between the substrate 17 and the glass 2 is covered with a molding material 18a, and the layer 21 is deleted to control the oscillating frequency. Then the area where the layer 21 is removed is covered with a molding material 18b to avoid the intrusion of moisture.
SUGITA MITSUYUKI
YANAGI HIROFUMI
KONNO TETSUO
| JPS5666905A | 1981-06-05 |