This 19 part tutorial shows how to design CAD library parts that make PCB design easier. Part one is a white paper, while the other parts are written as editorials on his blog. If you are serious about building up a part library this is definitely worth a look.
The CAD library is the starting point that affects every process from PCB layout through PCB manufacturing and assembly. There are dozens of things to consider when creating a CAD library that are often overlooked or not even considered that will directly affect the quality of the part placement, via fanout, trace routing, post processing, fabrication and assembly processes.
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