Patent ID: 7166207

Claim:
A method of manufacturing a striking plate of a golf club head, the method comprising: providing a striking plate, the striking plate having a striking surface and a rear surface opposed to the striking surface, the rear surface having a first surface portion from which a designated amount of material is to be removed; placing at least one electrode in close proximity to the first surface portion of the striking plate; flowing a liquid containing an electrolyte between the first surface portion and the electrode; and applying a low voltage between the first surface portion and the electrode, wherein the electrode has an overall negative charge and the golf club head has an overall positive charge, such that a pulsed high-density DC current passes between the electrode and the first surface portion; wherein this results in negatively charged electrolytes in the liquid attracting positively charged molecules of the first surface portion, such that the designated amount of material from the first surface portion is removed by electro-chemical oxidation and carried away by the liquid flow.