Patent ID: 7795127
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A method of manufacturing an electronic device comprising: a first step of forming a bump having a protruded portion on an electrode pad formed on a substrate body; a second step of forming an insulating layer on the substrate body and the protruded portion, providing on the insulating layer with a copper foil of which surface at an opposed side to the insulating layer is a rough surface, exposing a part of the protruded portion to an upper surface of the insulating layer by pressure bonding the copper foil onto the insulating layer, transferring the rough surface to the insulating layer and the part of the protruded portion exposed from the insulating layer, and then removing the copper foil; a third step of forming a conductive layer by firstly forming a Ti film in the upper surface of the insulating layer to which the rough surface is transferred and an exposed part of the protruded portion by using a depositing process, and then by forming a copper film on an upper surface of the Ti film by using the depositing process; a fourth step of forming a wiring layer through electrolytic plating using the conductive layer as a feeding layer; and a fifth step of patterning the wiring layer to form a conductive pattern connected to the bump.