A method for fabricating a substrate, which includes a plurality of chip package substrates. One combined PCB includes a multi-layer rigid PCB and a soft PCB. The multi-layer rigid PCB is fixed on the soft PCB. At least one grooves or a pair is formed on an upper surface of the multi-lay
A chip package substrate having a soft circuit board jas a multi-layer soft and hard composite PCB, a plurality of conducting components and a plurality of conducting holes. The conducting holes are formed in the multi-layer soft and hard composite PCB. The conducting components are
