Patent ID: 7550834

Claim:
A semiconductor package assembly, comprising: a first semiconductor package, including: a first rigid substrate having first and second opposed surfaces, the first substrate having a first set of contact pads on the first surface and a second set of contact pads on the second surface, a first set of one or more semiconductor die mounted on the first surface of the first substrate, a plurality of electrical connectors, an electrical connector of the plurality of electrical connectors including: a base portion affixed to a contact pad of the first set of contact pads on the first surface of the first substrate, a neck portion extending from the base portion away from the contact pad, and a head portion extending from the neck portion, and a first encapsulant for encapsulating at least the first set of contact pads, the first semiconductor die and the base portion, neck portion and part of the head portion of the electrical connector; and a second semiconductor package stacked on the first semiconductor package, including: a second substrate having third and fourth opposed surfaces, the second substrate having a third set of contact pads on the third surface, the head portion of the electrical connector affixed to a contact pad of the third set of contact pads, a second set of one or more semiconductor die mounted on the fourth surface of the second substrate, and a second encapsulant for encapsulating at least the second semiconductor die.