Patent ID: 6476331
Filing Date: 2002-11-05
Classification: H01L,H05K

Abstract:
A printed circuit board for a semiconductor package, comprising:a substrate having a first surface and a chip mounting region; a layer of metal circuit patterns on the first surface, each said circuit pattern having a planar outer surface parallel to the first surface, a bond finger at an inner end of the circuit pattern near the chip mounting region, and a peripheral side surface extending around the entire circuit pattern between the planar outer surface of the circuit pattern and the first surface, wherein the planar outer surface of the circuit pattern at the bond finger is covered by a layer of a plating metal, and a remaining portion of the planar outer surface of the circuit pattern outward of the bond finger and a peripheral side surface of the circuit pattern are devoid of the plating metal; and a layer of a solder mask coated on the first surface and the circuit patterns excluding the bond fingers.