Patent ID: 7671452

Claim:
A microarray package configured for mounting to a circuit board, said microarray package comprising: a leadframe having an array of contact posts composed of copper; a die carried by the lead frame; a plurality of bonding wires that electrically connect the die to the lead frame; an encapsulant that encapsulates the die, the bonding wires and the leadframe while leaving respective distal contact pads of the contact posts exposed and substantially co-planar with a bottom surface of the microarray package; a circuit board connector for each exposed contact pad of each contact post, the circuit board connector including a pedestal member composed of copper plated to a respective contact pad of one or more contact posts, said pedestal member protruding outwardly beyond the bottom surface of the microarray package by a height of about 15 μm to about 35 μm thereby forming a distal surface of the pedestal member and sidewalls of the pedestal member; a tin-based solder plating over the distal surface of the pedestal member; and a solder ball created by flowing molten solder over the tin plated distal surface of the pedestal member and the sidewalls of the pedestal member.