Patent ID: 8975529
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. An interposer comprising: a substrate comprising a penetrating-hole in a thickness direction thereof; a penetrating conductor disposed in the penetrating-hole; and a first conductive layer being in contact with a main surface of the substrate and electrically connected to the penetrating conductor, wherein the substrate includes first and second inorganic insulating layers separated from each other in the thickness direction, a first resin layer interposed between the first and second inorganic insulating layers and being in contact with the first and second inorganic insulating layers, and a second resin layer located in an outermost layer with which the first conductive layer is in contact, a coefficient of thermal expansion of the first resin layer in thickness and planar directions thereof is larger than those of the first and second inorganic insulating layers, and the second resin layer is interposed between the first conductive layer and the first inorganic insulating layer while being in contact with the first conductive layer and the first inorganic insulating layer, and has a thickness and Young's modulus smaller than those of the first resin layer.