Patent ID: 9165796
Filing Date: 2015-10-20
Classification: H01L

Abstract:
1. A device comprising: a first substrate having traces formed thereon, the first substrate having a die attach region, a keep-out region around a periphery of the die attach region, and a periphery region around a periphery of the keep-out region, the first substrate having a protective layer overlying the traces in the periphery region, at least a first trace of the traces extending from the protective layer to the die attach region, at least a first trace of the traces extending from the protective layer to the die attach region; a second substrate electrically coupled to the first substrate in the die attach region; and an underfill interposed between the first substrate and the second substrate, the underfill extending over the traces located in the keep-out region; wherein an area of the keep-out region is between about 5% and about 18% of an area of the second substrate.