PROJECTING ELECTRODE, ITS FORMATION METHOD AND INSPECTION METHOD FOR ELECTRONIC COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide a projecting electrode capable of securing sure electrical conduction between electrodes formed on a fine wiring board or a semiconductor device and to provide its formation method. SOLUTION: Projections 41 each having a sharp tip and a profile formed into a mountain-like shape are formed on an insulation material 40 of the wiring board by means of etching, a metal layer 42 comprising a first metal layer 1 and a second metal layer 2 is formed on the formed projections 41, and thus, bumps 7 comprising the projections 41 and the metal layer 42 are formed on this projecting electrode 51.