Patent ID: 9373559
Filing Date: 2016-06-21
CPC Classification: H01L

Claim Text:
1. A method comprising: joining two structures, a first structure and a second structure, together using a soldering process to form an interface, the interface having a plurality of solder connections; forming a first underfill material in an interior region of the interface, such that a periphery region of the interface extending from a perimeter of the second structure to the interior region remains free of the first underfill material, the first underfill material in direct contact with the first structure, the second structure, and at least one of the plurality of solder connections; exposing the first underfill material in the interior region to light while protecting the first underfill material in the periphery region from light, thereby curing the first underfill material in the interior region while leaving the first underfill material in the periphery region in an uncured state; removing the first underfill material in the periphery region; and forming a second underfill in the periphery region of the interface, the second underfill material in direct contact with the first underfill, the first structure, the second structure, and at least one of the plurality of solder connections.