Samsung Electro-mechanics Co., Ltd.

Tae Gon Lee

Young Hwan Shin

Yoon Su Kim

Kyoung Ro Yoon

Sung Eun Park

Hyo Soo Lee

A method for fabricating a semiconductor package substrate, including: preparing a copper clad laminate and half etching a copper foil on a wire bonding pad side of the copper clad laminate; depositing a first etching resist on the opposite sides of the copper clad laminate; forming circuit patterns on the first etching resist, constructing circuits including a wire bonding pad and a ball pad after the model of the circuit patterns, and removing the first etching resist; applying a solder resist to the copper clad laminate in such a way to expose the wire bonding pad and the ball pad; and plating the wire bonding pad with gold and subjecting the ball pad to surface treatment.

Method for fabricating semiconductor package substrate having different thicknesses between wire bonding pad and ball pad

Disclosed herein are a semiconductor package substrate and a method for fabricating the same. In the semiconductor package substrate, the circuit layer of the wire bonding pad side differs in thickness from that of the ball pad side to which a half etching process is applied. In addition, a connection through hole is constructed to provide an electrical connection between the plating lead lines on the wire bonding pad side and the ball pad side, thereby preventing electrical disconnection when the plating lead line of the wire bonding pad side is cut.

Semiconductor package substrate having different thicknesses between wire bonding pad and ball pad and method for fabricating the same

In the BGA package and its manufacturing method, a bonding pad is etched from the exposed surface to a part of the insulation layer-coated region so as to form a solder contact side having a dish configuration, which is planar at a bottom center and slanted at a periphery. With this bent structure of the dish configuration, the bonding pad provides an increased bonding area for the solder, so that the BGA package substrate is enhanced in reliability.

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Daejeon, South Korea

Tae Gon Lee