Patent ID: 7829378

Claim:
A method of manufacturing an electronic device comprising: a first step of forming a bump having a projection on an electrode pad provided on a substrate body; a second step of forming an insulating layer on the substrate body such that an exposed portion of the projection projects through and is exposed from an upper surface of the insulating layer; a third step of forming a first conductive pattern on the upper surface of the insulating layer and the exposed portion of the projection, wherein a portion of the first conductive pattern on the exposed portion of the projection forms a protruding portion of the first conductive pattern; a fourth step of removing the protruding portion of the first conductive pattern by machining, such that a tip surface of the projection is exposed through the first conductive pattern, and the tip surface of the projection is level with an upper surface of the first conductive pattern provided on the upper surface of the insulating layer; and a fifth step of forming a wiring layer through electrolytic plating using the first conductive pattern as a feeding layer and patterning the wiring layer to form a second conductive pattern connected to the bump.