Patent ID: 6851184

Claim:
A method for manufacturing a printed circuit board, said method comprising: coating a first photoresist on a metal layer formed on a substrate; removing portions of the first photoresist to expose at least one of ball pad areas or bonding pad areas of the metal layer; forming a plating layer on the exposed metal layer of the at least one of the ball pad areas or the bonding pad areas using the metal layer; coating a second photoresist on the plating layer, said second photoresist being reactive with a second quantity of light differing from a first quantity of light reactive with the first photoresist; irradiating a designated quantity of light to both the first photoresist and the second photoresist, wherein the designated quantity of light is reactive with the first photoresist but not reactive with the second photoresist, and developing the first photoresist and the second photoresist, to expose the metal layer except for circuit pattern areas; and forming circuit patterns by removing the exposed metal layer.