Patent ID: 7745926

Claim:
A composite multi-layer substrate comprising: a flat plate-like core member formed of a material having excellent electric conductivity, heat conductivity and high rigidity properties; a front side resin layer covering a front surface of said core member; a rear side resin layer covering a rear surface of said core member; a flat bottomed hole formed in an opening of either one of said front surface of said core member or said rear surface of said core member; an electronic component mounted in said flat bottomed hole, the thickness of the electronic component being equal to or larger than the thickness of said core member; a height size adjustment member interposed among said electronic component and said core member and said rear side resin layer; and a column segment which divides said core member and penetrates said front and rear surfaces in a thickness direction of said core member; wherein said column segment is adapted to providing an electrical signal transmission path or a power supply voltage transmission path to the front and rear surfaces of said substrate.