Designing and fabricating complex multilayer printed circuit boards (PCB) in-house is often not practical for a variety of reasons. For instance, cre- ating precise specifications for a complicated PCB may not be simple. Plus, it is also a critical component of a system that is not easy to revise, and manage inventory. So many companies outsource such projects. But finding the right vendor is not trivial. For that, it is important to understand the process and fabrication constraints of the PCB manufacturer, allowing the designer (the company) to correctly and precisely communicate design requirements to the PCB vendor. Besides guaranteeing accuracy, it allows designs to be interchangeable across several manufacturers.
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