A semiconductor package including a top-surface metal layer for
implementing circuit features provides improvements in top-surface
interconnect density, more flexible routing and mounting of top surface
semiconductor packages, dies and passive components or a conformal shield
cap implementation. The metal layer interconnected with an internal
substrate of the semiconductor package by blind vias laser-ablated
through the encapsulation and filled with metal. The vias extend from the
top surface to an internal package substrate or through the encapsulation
to form bottom-side terminals. The metal layer may be formed by circuit
patterns and/or terminals embedded within the encapsulation conformal to
the top surface by laser-ablating channels in the top surface of the
encapsulation and filling the channels with metal. A conformal coating
may be applied to the top surface of the semiconductor package over the
metal layer to prevent solder bridging to circuit patterns of the metal
layer.