Patent ID: 8925192
Filing Date: 2015-01-06
Classification: H05K,Y10T

Abstract:
1. A method for manufacturing a printed wiring board, comprising: preparing a substrate comprising a cured resin material and having a first surface and a second surface on an opposite side of the first surface; irradiating laser on a portion of the first surface of the substrate such that a first opening portion having a first opening on the first surface of the substrate and an inner diameter decreasing from the first surface toward the second surface is formed; irradiating laser on a portion of the second surface of the substrate such that a second opening portion having a second opening on the second surface of the substrate and an inner diameter decreasing from the second surface toward the first surface is formed and that the second opening portion joins the first opening portion and forms a penetrating hole comprising the first opening portion and the second opening portion and penetrating through the substrate; forming a first conductive circuit on the first surface of the substrate; forming a second conductive circuit on the second surface of the substrate; and filling the penetrating hole with plating such that a through-hole conductor which electrically connects the first conductive circuit and the second conductive circuit is formed in the penetrating hole, wherein the first opening of the first opening portion on the first surface of the substrate has a diameter R