Starting mixture for a dielectric composition, screen printing paste having such a starting mixture, and product obtained
AssigneeU.S. Philips Corporation
InventorsHugues Baudry, Claude Morhaim, Dominique Bricout
Life of this patent
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Abstract
Dielectric composition, screen printing paste having such a composition and products obtained. The invention describes a dielectric composition which may be used in particular as an insulating screen-printing paste, which is compatible with a copper-containing conductive screen-printed layer, the paste containing, dispersed in an organic vehicle, a mixture of ceramic phases, consisting essentially of zinc oxide and cobalt oxide, and a vitreous phase containing at least a glass which can be devitrified by dissolving the zinc oxide.
Claims6
A composition suitable for forming a dielectric composition consisting essentially of 85 to 60% by volume of a vitreous phase and 15 to 40% by volume of a ceramic phase, said ceramic phase consisting essentially of zinc oxide or of a mixture of zinc oxide and cobalt oxide and said vitreous phase having the following composition by mol percent:
- 30-50% SiO.sub.2, 20-40% ZnO, 0-20% B.sub.2 O.sub.3, 0-10% Al.sub.2 O.sub.3, 5-40% CaO+SrO+BaO and, as a coloring oxide, 0-10% of CoO.
Dependencies are inferred from the claim text.