Patent ID: 7608482

Claim:
A method of encapsulating integrated circuits mounted on a lead frame panel, the method comprising: positioning a shim in a mold, the shim having a plurality of cavities therein; positioning a lead frame panel having tape adhered to a bottom surface thereof in the mold such that the tape lies adjacent the shim, the shim and the lead frame panel being positioned such that first portions of the lead frame panel that contact the tape are positioned adjacent selected shim cavities and second portions of the lead frame panel that contact the tape are not positioned adjacent any shim cavities; and injecting an encapsulant material into the mold to encapsulate dice mounted on the lead frame panel, wherein some of the encapsulant material displaces the tape in regions within the cavities such that some encapsulant material flows under the first portions of the lead frame panel, and wherein the tape substantially prevents encapsulant material from flowing under the second portions of the lead frame panel.