The present disclosure includes a first substrate including a first wiring layer having a first connection electrode projecting by a predetermined quantity from a first interlayer insulation film and a second wiring layer having a second connection electrode projecting by a predetermined quantity from a second interlayer insulation film. On a bonded surface between the first and second substrates, the first and second connection electrodes are joined with each other, and at the same time, at least a part of the first interlayer insulation film and a part of the second interlayer insulation film which face to each other in a lamination direction are joined with each other.