Patent ID: 8330480

Claim:
An interconnection card comprising: a support substrate of insulating material having a first and a second surface; a multi wiring layer formed over the second surface of the support substrate, the multi wiring layer comprising alternately stacked insulating films made of resin and wiring layers made of conductive patterns, one of the wiring layers nearest to the support substrate including connection conducting patterns located on the second surface of the support substrate; recesses formed from the first surface to the second surface of the support substrate and exposing the connection conductive patterns of the multi wiring layer at bottoms, each of the recesses having a forwardly tapered side surface to form a widening aperture; and conductive films selectively formed on inner surfaces of the recesses, each covering the side surface and the bottom of one of the recesses, leaving the first surface of the support substrate not covered with the conductive films, wherein inner surfaces of the conductive films constitute contact surfaces for accommodating bumps of a semiconductor device to be inspected, outer surfaces of the conductive films covering the bottoms of the recesses are planarized with the second surface, and the connection conductive patterns are in electrical contact with the outer surfaces of the conductive films.