Patent ID: 8952527
Filing Date: 2015-02-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate including a plurality of wirings, a plating film formed to cover a surface of a first part of each said wiring, and an insulating film formed to cover a second part of each said wiring; a semiconductor chip having a plurality of bonding pads, and being mounted over a first surface of the substrate; and a plurality of solder bumps mounted over a second surface of the substrate opposite to the first surface, wherein each said bonding pad is electrically connected with a corresponding one of the plurality of solder bumps via one of said wirings, wherein the substrate has a quadrangular shape, wherein the plurality of solder bumps is arranged along each side of the second surface of the substrate in plan view, wherein each of selected ones of the plurality of wirings has an end portion, wherein a step portion is formed on the substrate, and is also formed along the plurality of solder bumps in plan view, and wherein the step portion has a side surface defined by both of a side surface of the insulating film and an exposed surface of the end portion of each of the selected ones of the plurality of wirings.