Patent ID: 7745736

Claim:
An interconnecting substrate, comprising: a base insulating film having a sunken section in a bottom surface thereof, a first interconnection provided in the sunken section, a via hole formed in the base insulating film, and a second interconnection which is connected to the first interconnection via a conductor within the via hole and is formed on a top surface of the base insulating film, wherein the interconnecting substrate comprises: a first interconnection pattern formed of the first interconnection which comprises at least a linear pattern which extends along a second direction orthogonal to a first direction, and a warpage-controlling pattern which is provided in the sunken section in the bottom surface of the base insulating film and is formed to suppress a warpage of the interconnecting substrate toward a bottom side on both sides of the first direction, wherein the first interconnection pattern has a component ratio of a Y-component extending along the second direction to an X-component extending along the first direction (Y/X) which is larger than 1 and the warpage-controlling pattern has a component ratio of the Y-component to the X-component (Y/X) which is smaller than 1.