Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1990-09-27
1991-11-12
Griffin, Donald A.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
174250, 252 623BT, C04B 3546, H05K 114, H01G 410
Patent
active
050652753
ABSTRACT:
A multilayer substrate with inner capacitors comprising a dielectric layer sandwiched between upper and lower insulating layers, a couple of printed electrodes in desired patterns within the thickness of the dielectric layer so as to form each capacitor at the portion of the dielectric layer corresponding to the electrodes, and a couple of leading terminals on one surface of the insulating layer, which communicate with the electrodes, the multilayer substrate being characterized in that the dielectric layer is composed of a ceramic composition mainly comprising MTiO.sub.3 -based ceramics (M represents one or several of Ba, Ca, Mg, La, Sr and Nd) and the insulating layer is composed of a ceramic composition mainly comprising MgO-SiO.sub.2 -CaO-based ceramics, which is defined by an area surrounded by the lines connecting points A, B, C, D, E, F and G as shown in FIG. 1 and listed below, wherein X, Y and Z respectively represent weight percent values of MgO, SiO.sub.2 and CaO at points A, B, C, D, E, F and G.
REFERENCES:
patent: 4302625 (1981-11-01), Hetherington et al.
patent: 4542107 (1985-09-01), Kato et al.
patent: 4882652 (1989-11-01), Furukawa et al.
Fujikawa Nobuyoshi
Fujioka Yoshihiro
Fujisaki Teruya
Hashimoto Akira
Onitsuka Katsuhiko
Griffin Donald A.
Kyocera Corporation
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