When the device mounting holes are non-metallized holes, the RF signal routing should be kept away from the device mounting holes. It is necessary to add ground copper between the RF signal wiring and the mounting holes, and add ground vias.
Route priority: Key signal lines are prioritized: key signals such as power, small analog signals, high-speed signals, clock signals, and synchronization signals are routed first. Density priority principle: Start wiring from the device with the most complex connection relationship on the single board. Start routing from the area on the board with the densest connections.