Patent ID: 7635519

Claim:
A composite dielectric sheet capable of being used as part of a multilayer electronic component, the dielectric sheet containing: a polyvinyl acetal resin; a high-dielectric constant filler, surface-treated with a coupling agent, dispersed in the polyvinyl acetal resin; and a crosslinking agent having two or more functional groups reactable with the polyvinyl acetal resin and the surface-treated high-dielectric constant filler, said crosslinking agent being a polyisocyanate; and, optionally, an epoxy resin, wherein the sum of the amounts of polyvinyl acetal resin, epoxy resin and polyisocyanate is 100 parts by weight, the amount of polyvinyl acetal resin is 30 to 70 parts by weight and the amount of polyisocyanate is at least ten parts by weight.