Patent ID: 7474538

Claim:
A semiconductor device mounting board, characterized by comprising: a wiring construction film including an insulator layer and a wiring layer alternately laminated thereon; a first electrode pattern in which an electrode pattern is disposed in an insulator layer at an outer-most position on one surface of the wiring construction film, a periphery of a side surface of the electrode pattern is in contact with the insulator layer, at least a surface on the opposite side of the surface of the electrode pattern in contact with the insulator layer is not in contact with the insulator layer, and a boundary between the insulator layer surface and an insulator film is in a plane in which a boundary between the electrode pattern and the insulator film exists; a second electrode pattern formed in a surface on an opposite side of the surface of the wiring construction film on which the first electrode pattern is formed; the insulator film including an opening pattern exposing the first electrode pattern; and a metallic supporter disposed in direct contact with the insulator film rear surface, and the metallic supporter is disposed on a rear surface of the insulator film such that the insulator film surface is exposed.