Patent ID: 7256495

Claim:
A package substrate electrolytically plated with Au without using any plating lead line, comprising: a base substrate formed with a plurality of through holes; a first copper plated layer plated on predetermined portions of the base substrate, which serves as a plating lead line, and inner surfaces of the through holes; a plated pattern layer formed on the first copper plated layer, the plated pattern layer including a second copper plated layer formed on portions of the first copper plated layer; wire bonding pads formed on predetermined portions of the plated pattern layer to contact the second copper plated layer and contact an upper surface of the base substrate where portions of the first copper plated layer have been removed, the wire bonding pads including Au and not connected to a remnant of a plating lead line; solder ball pads formed on predetermined portions of the plated pattern layer at a lower surface of the base substrate where portions of the first copper plated layer have been removed, the solder ball pads including Au and not connected to a remnant of a plating lead line; and a solder resist having a first portion contacting the upper surface of the base substrate and the plated pattern layer and a second portion contacting the lower surface of the base substrate and the solder ball pads.