Patent ID: 7384805
Filing Date: 2008-06-10
Classification: H01L

Abstract:
1. A transfer mold semiconductor packaging process comprising: providing a circuit substrate having a semiconductor chip mounted to a side thereof, the circuit substrate having a soldermask on the side, the soldermask comprising an elongated outer peripheral trench received about a periphery, the peripheral trench having spaced first and second side surfaces and overlying at least some circuitry formed on the side of the substrate; positioning a transfer mold to cover at least a portion of the circuit substrate having the semiconductor chip mounted thereto, the transfer mold having a void within which the semiconductor chip is received, the void having a perimeter edge, the positioning comprising aligning at least a portion of the void perimeter edge to overlap with at least a portion of the soldermask peripheral trench such that the void perimeter edge is received between the spaced first and second side surfaces; flowing encapsulant into the mold void over the semiconductor chip and to within the soldermask trench; and after the flowing, curing the encapsulant into a solidified mass.