Patent ID: 7304249

Claim:
A plurality of bonding pads formed on a printed circuit board (PCB), including a substrate having circuit patterns formed thereon, comprising: a plurality of copper patterns formed on the substrate and electrically connected to the circuit patterns, wherein the copper patterns have a substantially trapezoidal cross-sectional shape; a filler filled in spaces formed between adjacent copper patterns up to a height substantially level with upper surfaces of the plurality of copper patterns such that only the upper surfaces of the plurality of copper patterns are exposed; and a plating layer applied to only the exposed upper surfaces of at least one of the plurality of copper patterns, wherein the plating layer is not copper, wherein the plating layer comprises a nickel plating layer formed on upper surfaces of said at least one of the plurality of copper patterns but not to the side surfaces of the copper patterns, a gold plating layer being formed on both side faces and upper surfaces of the nickel plating layer.