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  4. Niedrig sinternde keramische Dielektrika mit hohen DK-Werten fuer Green-Tape-Systeme
 
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Patent
Title

Niedrig sinternde keramische Dielektrika mit hohen DK-Werten fuer Green-Tape-Systeme

Other Title
Low sintering ceramic dielectric with high dielectric values for green tape systems
Abstract
The invention relates to the fields of electrical engineering and electronics and affects dielectrics which can be used in green tape systems as high-dielectric film. The task of the invention consists in finding a ceramic composition glass active substance fulfilling the following requirements: - compatible with existing film, i.e. sinterable at 900 degrees C/10 min, - dielectric values > 200 - characteristics: type II X7R. The task is solved by the fact that the dielectrics contain an active substance and a glass. The active substance consists of a nuclear edge layer compound, whereby the nucleus is BaTiO<-3 and a layer of preformed lead perovskite of the type (Pb<-a A<-1,02-a)(B<-1 B<-2 )0<-3 is applied about said nucleus at least at 1000 degrees C. The active substance is embedded in a lead borosilicate glass, which contains PbO of 50 to 90 percent by weight B<-2 0<-3 of 3 to 30 percent by weight and SiO<-2 of 0.5 to 20 percent by weight.
Inventor(s)
Gesemann, H.J.
Schoenecker, A.
Voelker, K.
Link to:
Espacenet
Patent Number
1994-4406812
Publication Date
1995
Language
German
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
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