SparkFun Forums 

Where electronics enthusiasts find answers.

Questions relating to designing PCBs
By RichardM
Hello everyone, I want to know how 4 layer pcb is printed and how components are mounted on it :?:
By Nikosant03
On a 4 layer pcb design the parts are placed either on the top or bottom layer. The 2nd and 3rd layers are been accessed through vias and used for ground planes and traces.

Many softwares like Eagle or Altium can be used for 4 layer designing.