Solid dielectric capacitor and method of manufacture

Details Solid dielectric capacitor and method of manufacture Solid dielectric capacitor and method of manufacture

1990-02-21

1991-04-09

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

264 65, 501137, C04B 3546, H01G 412, H01G 410

Patent

active

050069551

ABSTRACT:
A monolithic capacitor having a dielectric ceramic body cosintered with at least two base metal electrodes. The ceramic body is composed of a major ingredient expressed by the formula,
(1-.alpha.){(Ba.sub.k-x M.sub.x)O.sub.k TiO.sub.2 }+.alpha.CaZrO.sub.3
where M is either or both of calcium and strontium, and .alpha., k and y are numerals in specified ranges. To this major ingredient is added a minor proportion of a mixture of lithium oxide, silicon dioxide and at least one metal oxide selected from among barium oxide, strontium oxide, calcium oxide, magnesium oxide and zinc oxide. For the fabrication of capacitors the mixture of the above major ingredients and additives in finely divided form are formed into moldings of desired shape and size, each with at least two electrodes buried therein. The moldings and electrodes are cosintered in a reductive or neutral atmosphere at temperatures of less than 1200.degree. C. and then are reheated at a lower temperature in an oxidative atmosphere.

REFERENCES:
patent: 4610968 (1986-09-01), Wada et al.
patent: 4610969 (1986-09-01), Wada et al.
patent: 4610970 (1986-09-01), Wada et al.
patent: 4610971 (1986-09-01), Wada et al.
patent: 4809130 (1989-02-01), Chazono et al.

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