The first place to start is to talk to your PCB fabrication house. There are some simple clearances that, if determined early in the design, will eliminate a lot of component shifting and re-routing later. When starting a new printed circuit board design, it’s sometimes easy to forget about the important design rules that will govern your project. #1 - Determine Your PCB Design Rules Before Layout
Specialty designs may need to follow additional board layout guidelines, but the PCB layout guidelines shown here are a good place to start for most designs. In this guide, we've compiled some of the essential PCB layout guidelines that apply to most modern circuit boards. Whether you are moving at a high speed or you're designing a high speed printed circuit board, good design practices help ensure your design will work as intended and can be manufactured at volume.