Taiyo Holdings Co., Ltd.

Yoshikazu Daigo

Shigeru Ushiki

An object of the present invention is to provide a resin composition having high electrically insulating properties, high thermally conductive properties, low elasticity, and high solder heat resistance as an electrically insulating layer for a metal-based base material to be used for electronic devices, especially for on-vehicle electronic devices, and having favorable workability during coating a body to be coated as a resin composition for an electrically insulating layer before being cured. The present invention provides a thermosetting resin composition, a cured product, and a resin-attached metal foil, each containing a rubber-like polymer compound (A) having a glass transition temperature (Tg) of −40° C. or lower and a weight average molecular weight (Mw) in a range of 8,000 to 50,000, an epoxy resin (B), a filler (C), and a phenoxy resin (D). The present invention also provides a method for producing a metal-based substrate having any one of the thermosetting resin composition, the cured product, and the resin-attached metal foil, and a method for producing an electronic part using the metal-based substrate.

Resin composition, resin-attached metal foil, cured product, metal-based substrate, and electronic part

Provided is a thermosetting resin composition capable of achieving both thermal conductivity and dielectric breakdown resistance at high levels and forming a cured product with a surface having high smoothness. In a thermosetting resin composition, a thermosetting resin, a thermally conductive filler, a rheology modifier, and a wet dispersant are mixed to be solvent-free, and a thermal conductivity of a cured product of the thermosetting resin composition is adjusted to 2.5 W/m·K or more.

Thermosetting resin composition, cured product, and printed wiring board

A white hardening resin composition includes a hardening resin and rutile-type titanium oxide produced by a chlorine method.

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Saitama, Japan

Yoshikazu Daigo