Patent ID: 9476914
Filing Date: 2016-10-25
CPC Classification: G01R,Y10T

Claim Text:
1. A method for manufacturing an interconnection card comprising: preparing a support substrate of insulating material, which has a first surface and a second surface opposite to the first surface; forming recesses on the first surface of the support substrate, which do not fully penetrate the support substrate, the second surface of the support substrate being flat; selectively forming conductive films on inner surfaces of the recesses, each covering a side surface and a bottom of one of the recesses; grinding the second surface of the support substrate, until bottoms of the conductive films are exposed from the second surface; and forming a multi wiring layer on the second surface of the support substrate, the multi wiring layer comprising insulating films made of resin and wiring layers made of conductive patterns, one of the wiring layers nearest to the support substrate including the conductive patterns which locate on the second surface and are in electrical contact with the bottoms of the conductive films.