Liquid crystal polyester composition and electronic circuit board using the same

Abstract

To provide a liquid crystal polyester composition which is suited for use as a material for forming a liquid crystal polyester film having excellent thermal conductivity. Also, an excellent electronic circuit board is provided by using an insulating film obtained from the liquid crystal polyester composition. The liquid crystal polyester composition of the present invention is composed of a liquid crystal polyester, a solvent and a thermally conductive filler. The thermally conductive filler is contained in the amount of 50 to 90 volume % based on the total amount of the liquid crystal polyester and the thermally conductive filler, and the thermally conductive filler contains 0 to 20 volume % of a first thermally conductive filler having a volume average particle diameter of 0.1 μm or more and less than 1.0 μm, 5 to 40 volume % of a second thermally conductive filler having a volume average particle diameter of 1.0 μm or more and less than 5.0 μm and 40 to 90 volume % of a third thermally conductive filler having a volume average particle diameter of 5.0 μm or more and 30.0 μm or less.

Dependencies are inferred from the claim text.