Patent ID: 8785791
Filing Date: 2014-07-22
Classification: H01L,H05K

Abstract:
1. A through wiring substrate comprising: a substrate having a first face and a second face; and a through-wire formed by filling, or forming a film of, an electrically-conductive substance into a through-hole which penetrates between the first face and the second face and which has a bend part comprising an inner peripheral part that is curved in a recessed shape and an outer peripheral part that is curved in a protruding shape, in a longitudinal cross-section of the through-hole, and has a first liner part extending in a thickness direction of the substrate and a second linear part extending in a direction parallel with the first face of the substrate, wherein: the outer peripheral part is a quandrant of a circular arc part with a radius of R centers of the quardrant of the outer peripheral part and the quandrant of the inner peripheral part are at the same position; and a difference between R