Patent ID: 8465666

Claim:
A thermally conductive composition including a cured thermosetting resin containing a crystalline epoxy resin component, and an inorganic filler, a content by percentage of the inorganic filler in the thermally conductive composition being 66% or more by volume, and 90% or less by volume, the thermally conductive composition comprising: a main portion in which the inorganic filler is mainly contained; and a surface layer portion which is made mainly of the crystalline epoxy resin component and is formed on the main portion to be continuous to the main portion, wherein a front surface of the surface layer portion is specified by at least one of: an arithmetical average roughness Ra of 3000 Å or less; a maximum height Ry of 15000 Å or less; and a 20-degree glossiness of 70 or more.