Patent ID: 8389406

Claim:
A method of manufacturing a semiconductor device, the method comprising: preparing a semiconductor substrate formed with an electrode pad on a main surface side; forming a first insulating layer from an insulating material so as to cover the electrode pad and the semiconductor substrate, the first insulating layer provided with a first opening through which a portion of the electrode pad is exposed; forming a first redistribution layer on the first opening and on the first insulating layer from a first electrically conductive material; forming a second insulating layer from an insulating material, the second insulating layer provided with a second opening through which a portion of the first redistribution layer that is superimposed on the first opening is exposed, and the second insulating layer being formed so as to cover portions of the first redistribution layer other than those of the second opening and to cover the first insulating layer; forming a second redistribution layer on the second opening and on the second insulating layer from a second electrically conductive material; and first processing when forming the first redistribution layer, in which, the first electrically conductive material is filled in the first opening to form a via interconnect and thereafter the first redistribution layer is formed on the first insulating layer with the first electrically conductive material such that the first redistribution layer is electrically connected to the via interconnect, wherein the first processing includes forming a first electrically conductive layer containing the first electrically conductive material so as to cover the electrode pad and the first insulating layer, forming a resist film on the first electrically conductive layer other than in a region where the first opening is formed, filling the first electrically conductive material in the first opening to form the via interconnect by growing the first electrically conductive material using an electroplating method until a surface of the first electrically conductive material becomes higher than a surface of the first insulating layer, removing a part of the resist film to leave a remainder part of the resist film such that the first electrically conductive layer is exposed from the resist film in a region where the first redistribution layer is to be formed, and growing, in the exposed region, the first electrically conductive material on the first electrically conductive layer using an electroplating method to form the first redistribution layer to electrically connect to the via interconnect.