resistcoated

Resist coated refers to a surface that has been treated with a protective layer known as a resist. This resist layer is typically applied to a substrate to shield it from subsequent processing steps, such as etching or plating. The resist acts as a barrier, preventing the underlying material from being affected in the areas where the resist is present.

The application of resist coating is a common technique in various manufacturing processes, most notably in the fabrication of printed circuit boards (PCBs) and semiconductor devices. In these industries, photolithography is often used in conjunction with resist coatings. A pattern is transferred to the resist layer using light, creating areas that are either exposed or protected. After development, the resist remains on the substrate in the desired pattern.

Once the resist is applied and patterned, the substrate can undergo further treatment. For example, in PCB manufacturing, areas not covered by resist may be etched away to create conductive traces. In semiconductor fabrication, resist can protect specific regions of a silicon wafer during ion implantation or etching processes. After the intended treatment is complete, the resist layer is removed, revealing the modified substrate. The type of resist used, whether positive or negative, determines whether the exposed or unexposed areas are removed during development. This selective protection and removal are crucial for creating intricate designs and functional components.