Patent ID: 8525333

Claim:
An electronic device, comprising: an electronic element; an interposer substrate having mounted on one surface thereof said electronic element; an interconnection substrate, comprising on one surface thereof, said interposer substrate; and a plurality of connection parts interconnecting said interposer substrate and said interconnection substrate, wherein one portion of said connection parts comprises an electrical connection part that electrically interconnects said interposer substrate with said interconnection substrate, and a remaining portion comprises a dummy connection part that produces no functional deficiency even when said dummy connection part fails to electrically interconnect said interposer substrate with said interconnection substrate, wherein said dummy connection part comprises at least one out of said connection parts at least partially overlapping with said electronic element in a plan projection, wherein said dummy connection part overlaps the electronic element at a location on the element which is farthest from a center of said electronic element, wherein the plurality of connection parts comprises a connection material, and a Young's modulus of said connection material in said dummy connection part is greater than a Young's modulus of said connection material in said electrical connection part, wherein the electrical connection part comprises a first electrical connection part overlapping the electronic element and a second electrical connection part not overlapping the electronic element in the plan projection, wherein the one surface of the interconnection substrate has a substantially rectangular shape and an imaginary diagonal line, and wherein a distance between the dummy connection part and the first electrical connection part which is next to the dummy connection part is shorter than a distance between the dummy connection part and the second electrical connection part which is next to the dummy connection part along the imaginary diagonal line.