Ase Electronics (M) Sdn Bhd

Heng Ee Ooi

Salmi Abdul Rahman

Chin Yee Fong

Siew Leong Chaw

An electroplating process reduces the whisker formation rate that results from an interruption of the electroplating process for an alloy. The process forms a tin strike or a thin layer of a pure(>99.9%) metal on the alloy during an activation operation, so that an interruption in the electroplating process during which the lead frame or other work piece remains in an activation solution etches the pure metal layer rather than the alloy and thus does not unacceptably roughen the surface of the work piece. An exemplary embodiment forms a tin strike on a predominantly copper lead frame during an activation operation and forms an Sn&mdash;Pb solder layer on the tin strike during a plating operation. The solder layer is generally more than five times as thick as the tin strike layer.

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Penang, Malaysia

Heng Ee Ooi