Patent ID: 7390732

Claim:
A method of producing a semiconductor device comprising the steps of: forming a plurality of pyramid-shaped bump electrodes of the semiconductor device; and connecting the pyramid-shaped bump electrodes to pad electrodes of the semiconductor device; wherein said step of forming the plurality of pyramid-shaped bump electrodes includes: a step of forming pyramid-shaped etched holes by anisotropically etching a base material having a crystal orientation, and a step of filling up the etched pyramid-shaped holes by plating a metal to form the pyramid-shaped bump electrodes, wherein a shape of the pyramid-shaped bump electrodes is identical to a shape of the etched pyramid-shaped holes; and wherein the step of connecting the pyramid-shaped bump electrodes to the pad electrodes includes: a step of attaching the base of the pyramid-shaped bump electrodes to the pad electrodes, and a step of transferring the pyramid-shaped bump electrodes to the pad electrodes, wherein the pyramid-shaped bump electrodes are each formed by a conductive material, wherein the pyramid-shaped bump electrodes have a shape of a pyramid, which is a figure having a square base and four triangle-shaped sides, and wherein the four triangle-shaped sides meet at a common point.