A high dielectric constant thick film capacitor with copper electrode

A high-dielectric-constant thick-film capacitor with a copper electrode has been developed. The dielectric, which consists of the composition Pb(Mg/sub 1/3/Nb/sub 2/3/)/sub 0.7/Ti/sub 0.2/(Ni/sub 1/2/W/sub 1/2/)/sub 0.1/O/sub 3/ and 15 mol.% of PbO/sub 2/NiO, is added as a sintering aid. The use of PbO/sub 2/ makes it possible to manufacture the thick-film capacitor in a nitrogen atmosphere without oxidation of the copper electrode. The thick-film capacitor has a dielectric constant of 5000, a dissipation factor of less than 2.0%, and a resistivity of 5.7*10/sup 12/ Omega -cm. The electrical performance meets the Y5U specification in the EIA standard. In the accelerated life test, the high insulation resistance between conductors is maintained after 1000 h of testing.<
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