How to make Vias to move to another PCB layer for STM32H757xI in package WLCSP156 ?
Hello all, How can I make a vias for the WLCSP156 to connect my internal layers from my PCB with WLCSP156 pads? If the pad diameter is only 0.220 mm in WLCSP156 , and the minimum hole for the vias at the factories is 0.15 mm (with ring is 0.25 mm tha...