Patent ID: 9646857
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A method comprising: providing an assembly comprising a substrate having a top surface, a surface mounted device (SMD) mounted on the top surface of the substrate, and a space between the SMD and the top surface of the substrate, wherein the SMD has at least one sealed cavity that is biased towards the top surface of the substrate; laying a sheet mold compound over the SMD and portions of the top surface of the substrate about the SMD; heating the assembly such that the sheet mold compound transitions to a liquid phase to form a molten mold compound; subjecting the assembly to a vacuum that creates a negative atmosphere to allow the molten mold compound to flow towards the top surface of the substrate and about the SMD; pressing the molten mold compound toward the top surface of the substrate at a low pressure such that the space between the SMD and the top surface of the substrate is substantially filled and the SMD is substantially encapsulated, wherein the low pressure is no more than 2 Mpa; curing the molten mold compound to provide a cured mold compound; and planarizing a top surface of the cured mold compound.