QUALCOMM Incorporated
SUBSTRATE COMPRISING INTERCONNECTS EMBEDDED IN A SOLDER RESIST LAYER

Abstract:

A substrate that includes a core layer, at least one first dielectric layer located over a first surface of the core layer, at least one second dielectric layer located over a second surface of the core layer, a plurality of first interconnects located over a surface of the at least one first dielectric layer, a plurality of second interconnects located over the surface of the at least one first dielectric layer, a plurality of third interconnects located over the surface of the at least one first dielectric layer, and a solder resist layer located over the surface of the at least one second dielectric layer. The plurality of third interconnects and the plurality of second interconnects are co-planar to the plurality of first interconnects. The solder resist layer includes a first portion, a second portion, and a third portion.