Patent ID: 7091060

Claim:
A method of making a package for a substrate assembly that includes a die mounted to a substrate, comprising: contacting a first major surface of the substrate assembly with a first mold portion; contacting the first mold with a second mold portion; injecting an encapsulant into a cavity defined by the first mold portion and the second mold portion to cover the first major surface of the substrate assembly, an edge of the substrate assembly, and a portion of a second major surface of the substrate assembly so that the encansulant extends continuously from the first major surface to the edge, and from the edge to the second major surface, wherein the cavity is configured to form a rib on the second major surface; providing solder balls to at least a portion of the second major surface so as to electrically connect to the die; and selecting a thickness of the rib based on a solder ball dimension.