This step creates the physical design of the printed circuit board. It requires coordination with the mechanical design. The circuit board mechanical details and component placements will be entered into the design package and circuit routing will be performed. Design rules will be applied as necessary to ensure integrity of critical signals. A 3D Step file can be produced for your use in verifying mechanical fit if desired. Once the PCB design is approved, Gerber files will be generated that can be used by a PCB fabrication house to fabricate the actual boards.