There is an old saying: PCB design involves 90% layout and 10% wiring. So, what are the skills for PCB wiring?

　　1. Don't rely on your automatic router

　　Almost all PCB design software has a tool called an automatic router, but an automatic router will never replace itself in wiring and should only be used for a few reasons, including:

　　Accurate. After placing all components, an automatic router can be used to view the completion level obtained.

　　Bottleneck. You can also use an automatic router to discover bottlenecks and other critical connection points that may not be visible during component placement.

　　Inspiration. You can use an automatic router as a source of inspiration to understand how to route some traces that you cannot complete.

　　In addition to the above reasons, it is recommended not to rely on automatic wiring to complete all wiring on the layout of the circuit board.

　　2. Understand the manufacturer's specifications

　　Before starting to lay copper wiring, please call or email the customer to inquire if they have any specific requirements for minimum wiring width, wiring spacing, and the number of layers that can be processed. By understanding this information in advance, it is possible to set wiring width and spacing values in design rules without having to rewire the entire circuit board layout.

　　3. Find the trace width

　　To determine the thickness of the wiring, a convenient wiring width calculator such as an advanced circuit can be used. This calculator will allow for the insertion of estimated current and thickness, and obtain wiring width values in exchange for internal and external layers.

　　4. Leave enough space between traces

　　Be sure to leave sufficient space between all wiring and pads in the PCB layout. It is recommended to always leave a gap of 0.007 inches to 0.010 inches between all adjacent pads and wiring on the board.