Patent ID: 9627346
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A structure comprising: a first package comprising: a substrate; first external electrical connectors mechanically and electrically coupling the first package to the substrate, the first external electrical connectors being between the first package and the substrate; and an underfill material around a first periphery region of the first package and between the first periphery region and the substrate, a first gap being between a first central region of the first package and the substrate and not containing the underfill material, wherein a sidewall of the underfill material is disposed between a first one of the first external electrical connectors and a second one of the first external electrical connectors disposed within the first gap, wherein the underfill material extends along sidewalls of the redistribution structure, and wherein the underfill material extends higher than a surface of the passivation layer opposite the dielectric layer and lower than a surface of the first die opposite the redistribution structure.