Patent ID: 7546682

Claim:
A method for repairing a circuit board having defective pre-soldering bumps, comprising the steps of: providing the circuit board having a plurality of conductive pads and a solder mask formed on a surface thereof, wherein the solder mask has a plurality of openings to expose the conductive pads, the conductive pads have a plurality of pre-soldering bumps formed thereon, and wherein the pre-soldering bumps are made of a pre-soldering bump material and at least one of the pre-soldering bumps has a defect, and the circuit board further has an exposed wire electrically connecting to the conductive pad having the defective pre-soldering bump formed thereon; providing a direct current power supply having a first electrode and an opposing second electrode, wherein the first electrode is electrically contacted the exposed wire; providing an electrolyte having an anion of the pre-soldering bump material, and placing the circuit board into the electrolyte; and providing a micro-electrode nearby the defective pre-soldering bump to thereby repair the defect, wherein the micro-electrode electrically connects to the second electrode.