US Patent 11523502 Method and procedure for miniaturing a multi-layer PCB

A multiple layer printed circuit board (PCB) in which the cores (or core layers) are removed and replaced with prepreg layers, which provide structure integrity for the PCB. Such a multi-layer PCB may include a plurality of layers that include a plurality of signal layers, a plurality of ground plane layers, a plurality of inner signal layers, and a single core substrate layer. Each layer in the plurality of layers may be separated from every other layer in the plurality of layers by at least one prepreg substrate layer.