Mitsui Minings & Melting Co., Ltd.

Kenshiro Fukuda

Yoshihiro Yoneda

Toshihiro Hosoi

Toshifumi Matsushima

Tetsuro Sato

Tomohiro Ishino

There is provided a resin composition that can greatly improve voltage endurance while ensuring high capacitance and excellent circuit adhesion, when used as the dielectric layer of a capacitor. This resin composition includes a binder component including bisphenol S, an epoxy resin curing agent having a phenolic hydroxyl group, and an epoxy resin; and a dielectric filler.

Resin composition, copper foil with resin, dielectric layer, copper-clad laminate, capacitor element, and printed wiring board with built-in capacitor

A resin composition for use in a dielectric layer of a capacitor is provided that can control a decrease in capacitance or dielectric constant at high temperature and ensure high dielectric characteristics and high adhesion of the composition to a circuit. The resin composition contains a resin component containing an epoxy resin, a diamine compound, and a polyimide resin; and a dielectric filler composed of a metal oxide containing at least two elements selected from the group consisting of Ba, Ti, Sr, Pb, Zr, La, Ta, and Bi. The content of the dielectric filler is 60 to 85 parts by weight on the basis of 100 parts by weight of solid content in the resin composition.

A resin composition for use in a dielectric layer of a capacitor device or a capacitor-embedded printed circuit board is provided in which the resin composition can improve stability in capacitance and insulation properties of the capacitor device under high temperature and high humidity and ensures high adhesion of the dielectric layer to the device. The resin composition comprises a resin component and a dielectric filler. The resin component comprises an epoxy resin, an active ester resin, and an aromatic polyamide resin.

Resin composition, copper foil with resin, dielectric layer, copper clad laminate sheet, capacitor element and printed wiring board with built-in capacitor

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Ageo, Japan

Kenshiro Fukuda