Dielectric ceramic composition and package made of the same comp

Details Dielectric ceramic composition and package made of the same comp Dielectric ceramic composition and package made of the same comp

1994-07-20

1996-08-20

Brunsman, David

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

C04B 3546

Patent

active

055479081

ABSTRACT:
A dielectric ceramic composition having a high dielectric constant and a coefficient of thermal expansion nearly comparable with that of alumina, and a package for packaging semiconductor. The dielectric ceramic composition contains 0.1 to 0.6 parts by weight of manganese reckoned as an oxide per 100 parts by weight of chief components of the formula xTiO.sub.2 .cndot.yMgO.cndot.zSrO or of the formula xTiO.sub.2 .cndot.yMgO.cndot.zCaO wherein x, y and z are numerals that lie within given ranges. The package for packaging semiconductor comprises a package body composed of alumina and having a semiconductor-mounting portion, and a capacitor made up of a dielectric layer and an electrode layer provided on said semiconductor-mounting portion, wherein the dielectric layer is composed of the TiO.sub.2 --MgO--SrO--MnO.sub.2 -type dielectric ceramic or the TiO.sub.2 --MgO--CaO--MnO.sub.2 -type dielectric ceramic.

REFERENCES:
patent: 4612140 (1986-09-01), Mandai et al.
patent: 4746639 (1988-05-01), Sano et al.

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