Patent ID: 7754803

Claim:
A resin composition for an electronic material or for use in formation of an optical circuit containing: 100 parts by weight of a thermoplastic resin; and 0.1-65 parts by weight of an inorganic compound comprising a layer silicate and at least one of whisker and silica, said layer silicate being dispersed in the resin composition such that it has a mean interlayer spacing of at least 3 nm along the (001) plane, when measured by a wide-angle X-ray diffraction measurement method, and a part or all of stacks consists of 5 or less layers, wherein said resin composition has a mean linear expansion coefficient (α2) of 3.0×10 −3 (° C. −1 ) or below over the temperature range from a temperature 10 ° C. higher than a glass transition temperature of the resin composition to a temperature 50° C. higher than the glass transition temperature of the resin composition, and a mean linear expansion coefficient ratio (α2/α1) of up to 70, where said mean linear expansion coefficient ratio is calculated by dividing the mean linear expansion coefficient (α2) over the temperature range from a temperature 10° C. higher than a glass transition temperature of the resin composition to a temperature 50° C. higher than the glass transition temperature of the resin composition by a mean linear expansion coefficient (α1) over the temperature range from a temperature 50° C. lower than the glass transition temperature of the resin composition to a temperature 10° C. lower than the glass transition temperature of the resin composition. (α2) of 3.0×10 −3 (° C. −1 ) or below over the temperature range from a temperature 10° C. higher than a glass transition temperature of the resin composition to a temperature 50° C. higher than the glass transition temperature of the resin composition.