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In PCB production, various fabrication techniques are used to create the complex circuits that power modern electronic devices. Two of the most common methods are chemical etching and mechanical milling. Each technique offers unique advantages and challenges, making it important for engineers, designers, and manufacturers to understand their differences.

In the context of PCB production, silkscreen refers to the layer of ink printed on the surface of a printed circuit board that contains important text and symbols. This layer is used to label component positions, indicate test points, display logos or warnings, and assist with orientation during assembly.

PCB milling is a subtractive manufacturing technique used in PCB production where a mechanical tool precisely removes unwanted copper from a copper-clad substrate to form the required circuit patterns. Unlike traditional chemical etching, which uses hazardous chemicals to dissolve excess copper, milling relies on physical cutting, offering a cleaner and more environmentally friendly approach.