Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1987-09-18
1988-09-20
Griffin, Donald A.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
29 2542, 264 61, C04B 3546, H01G 410, H01G 700
Patent
active
047729856
ABSTRACT:
Disclosed is a thick film capacitor comprising (a) a sintered layer of a ferroelectric material mainly consisting of one or more ferroelectric inorganic compounds having a perovskite structure and an inorganic binder having a eutectic composition which experiences a liquid phase at a temperature lower than the sintering temperature of the ferroelectric inorganic compounds, and (b) at least two electrodes formed on both surfaces of the sintered layer of the ferroelectric material. In the thick film capacitor of this invention, the perovskite structure of the ferroelectric inorganic compounds is not destroyed upon sintering. Therefore, a high degree of sintering, a good dielectric characteristic and high moisture and migration resistances can be obtained.
REFERENCES:
patent: 3157835 (1964-11-01), Cirkler et al.
patent: 3305394 (1967-02-01), Kaiser et al.
patent: 3591504 (1971-07-01), Jaffe
patent: 3600652 (1971-08-01), Riley
patent: 4392180 (1983-07-01), Nair
patent: 4625258 (1986-11-01), Jackson
Materials Research Bulletin, vol. 19, pp. 1543-1549, 1984, "A low-Temperatuee Firing Thick Film Capacitor Material Based On Lead Iron Niobate/Tungstate", T. C. Reiley et al.
Furukawa Osamu
Harata Mitsuo
Iwase Nobuo
Segawa Masao
Yasumoto Taka-aki
Griffin Donald A.
Kabushiki Kaisha Toshiba
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