US Patent 10515878 Semiconductor package with partial plating on contact side surfaces

Embodiments of the present invention are directed to a semiconductor package with partial plating on contact side surfaces. The semiconductor package includes a top surface, a bottom surface opposite the top surface, and side surfaces between the top and bottom surfaces. Contacts are located on peripheral edges of the bottom surface. Each of the contacts includes a first surface that is flush with the bottom surface, a second surface that is flush with one of the side surfaces, and a third surface between the first surface and the second surface. Each of the side surfaces can include a step such that the area of the bottom surface is differently sized from the area of the top surface and the third surface is located at the step. The first surface is plated, while the second surface is exposed (not plated). At least a portion of the third surface is plated.