Patent ID: 8389338

Claim:
A method for forming a multiple semiconductor die module comprising the steps of: pre-molding a first leadframe with molding material to define an annular wall of molding material surrounding a central cavity, the first leadframe having a first array of contacts embedded in the periphery of the molding material, all said first array of contacts exposed on one side of the pre-molded contacts and one or more of the first array of contacts having internals leads extending into the cavity of the first pre-molded leadframe; pre-molding a second leadframe with molding material to define an annular wall of molding material surrounding a central cavity, the second leadframe having a second array of contacts embedded in the periphery of the molding material, all said second array of contacts exposed on one side of the pre-molded contacts and one or more of the second array of contacts having internals leads extending into the cavity of the second pre-molded leadframe; flip-chip attaching semiconductor dice having connections on a first side thereof to the internal leads in the cavities of the first and second pre-molded leadframes to form separate first and second pre-molded packages; and interconnecting said first and second pre-molded packages by attaching the first array of contacts of the first leadframe to the second array of contacts of the second leadframe.