Method of trimming thick film capacitor

Details Method of trimming thick film capacitor Method of trimming thick film capacitor

1979-09-07

1982-07-06

Goldberg, Elliot A.

Electric heating

Metal heating

By arc

29 2542, 361271, H01G 700

Patent

active

043385060

ABSTRACT:
An adjustable thick film capacitor includes a conductive paste layer which is fired to form a first electrode on a substrate, at least one dielectric paste layer over the conductive electrode which is also fired, and an organo-metallic paste layer over the dielectric layer, which is fired at high temperature to form a very thin sintered metallic conductive layer for the second electrode. The organo-metallic paste includes molecules having conducting particles, such as gold atoms, which after firing form a residue layer having a thickness of the order of 1 micron. This thin electrode can be trimmed by an accurately controlled low energy laser beam to adjust the capacitor value.

REFERENCES:
patent: 2235489 (1941-03-01), Rath
patent: 2335714 (1943-11-01), Voigtmann
patent: 2919483 (1960-01-01), Gravley
patent: 3379942 (1968-04-01), Davis
patent: 3600652 (1971-08-01), Riley
patent: 3683245 (1972-08-01), Bacher
patent: 3872360 (1975-03-01), Sheard
patent: 3947934 (1976-04-01), Olson
patent: 3988651 (1976-10-01), Hertz
patent: 4081653 (1978-03-01), Koo

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