摘要:
A composite dielectric material comprising a resin resulting from a polyvinylbenzyl ether compound and a dielectric ceramic powder dispersed therein is useful in the high-frequency region. A composite magnetic material comprising a polyvinylbenzyl ether compound and a magnetic powder is also provided as well as a flame retardant material comprising a polyvinylbenzyl ether compound and a flame retardant. These materials may be used in the fabrication of substrates, prepreg sheets, coated metal foils, molded items, and metal foil-clad substrates.
摘要:
Generally spherical metal particles (1) consisting essentially of single crystal grains, having a mean particle size of 0.1 to 10 nullm are surface coated with an insulating or dielectric layer (2a or 2b) as by a spray pyrolysis process, and the coated metal particles are dispersed in a resin to form a composite magnetic or dielectric material. The composite magnetic material is highly insulating, easy to prepare, free of corrosion and has improved high-frequency characteristics and withstanding voltage. The composite dielectric material has a high dielectric constant even at a reduced content of dielectric. There are also provided a molding material, powder compression molding material, paint, prepreg, and substrate.