Trimming capacitor having a void located within the dielectric

Details Trimming capacitor having a void located within the dielectric Trimming capacitor having a void located within the dielectric

1997-08-14

1999-12-14

Kincaid, Kristine

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

361313, 361320, H01G 406

Patent

active

06002576&

ABSTRACT:
A trimming capacitor with less drop in Q due to laser trimming, wherein a non-reducing ceramic material which can be sintered either within a neutral atmosphere or a reducing atmosphere is used as the material of the ceramic dielectric. A trimming capacitor electrode is provided on the surface of or within a ceramic dielectric containing internal capacitor electrodes. Part of the trimming capacitor electrode is removed by a laser beam to reduce an area thereof facing the internal capacitor electrode, to adjust the electrostatic capacitance to a desired value. The use of non-reducing ceramic material reduces the amount of dielectric material that is converted to semiconductor material during laser trimming.

REFERENCES:
patent: 4308570 (1981-12-01), Burn
patent: 4875136 (1989-10-01), Sano et al.

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