Patent ID: 8492896
Filing Date: 2013-07-23
Classification: H01L

Abstract:
1. A semiconductor apparatus comprising: a substrate; a plurality of electrode pads formed on a surface of the substrate; and a protection film having a plurality of through holes formed in one-to-one correspondence with the electrode pads, and covering circumferential edge portions of the electrode pads and the surface of the substrate except for areas under the electrode pads, wherein: an inner wall of each through hole is a slant surface slanted such that the through hole expands with distance from an electrode pad corresponding thereto, a plurality of metal layers have been formed in one-to-one correspondence with the electrode pads, each of the metal layers covering (i) an exposed part of a corresponding electrode pad not covered by the protection film and (ii) an area of a corresponding slant surface extending from the exposed part up to a middle of the slant surface, a plurality of bumps have been connected one-to-one with the plurality of metal layers, the protection film has a two-layer structure composed of a first layer and a second layer stacked on the substrate in this order, and a circumferential end of each of the metal layers is positioned at a middle of the first layer in a thickness direction.