Laminar electrical component with magnesium orthoborate

Details Laminar electrical component with magnesium orthoborate Laminar electrical component with magnesium orthoborate

1985-08-07

1986-12-30

Hix, L. T.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

501135, H01G 410

Patent

active

046333665

ABSTRACT:
A laminar electrical component has at least one ceramic dielectric layer of from 85 to 100 mole percent magnesium orthoborate (Mg.sub.3 B.sub.2 O.sub.6) which has a low dielectric constant and a high Q. A monolithic ceramic capacitor may have a predominantly magnesium orthoborate body with lithium oxide as a flux so that sintering may be as low as 850.degree. C. and in a reducing atmosphere accommodating buried copper electrodes. A predominantly Mg.sub.3 B.sub.2 O.sub.6 multi-level printed wiring substrate of low dielectric constant can include tightly adhered layers of a high dielectric constant ceramic for making buried high capacity filter capacitors, and can also include cofired base metal conductors.

REFERENCES:
patent: 3770529 (1973-11-01), Anderson
patent: 3885941 (1975-05-01), Maher
patent: 3962081 (1976-06-01), Yarwood et al.
patent: 4027209 (1977-05-01), Maher
patent: 4101952 (1978-07-01), Burn
patent: 4127415 (1978-11-01), Quackenbush et al.
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patent: 4266265 (1981-05-01), Maher
patent: 4308570 (1981-12-01), Burn
patent: 4464420 (1984-08-01), Taguchi et al.
H. M. Davis and M. A. Knight, "The System Magnesium Oxide-Boric Oxide" The Journal of the American Ceramic Society, vol. 28, No. 4, Apr. 1, 1945, pp. 97-102.

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