Importance

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Abstract

A bottom lead semiconductor package includes a plurality of bottom leads with inner leads extended upwardly bent or inclined from corresponding ones of the bottom leads. A semiconductor chip is attached to an upper surface of each of the bottom leads by a nonconductive adhesive, and a plurality of conductive wires electrically connects a plurality of chip pads on the chip to the inner leads. A molding compound forms a package body having a plurality of openings such that a lower surface of each of the bottom leads is externally exposed. The fabrication method includes a molding step for sealingly molding the package but exposing the lower surface of the bottom leads and the inner leads upwardly bent extending from corresponding ones of the bottom leads. A mold with a plurality of protrusions on a bottom surface in the mold and the protrusions respectively serve to fill openings formed below each of the inner leads to prevent the flow of molding resin into the openings.

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First Claim