What is Etched Printed Board

By Bester PCBA

Last Updated: 2023-12-04

What is Etched Printed Board

An etched printed board, also known as an etched PCB or etched circuit board, refers to a printed circuit board that has undergone the process of etching. Etching is a step in the manufacturing of PCBs, where unwanted copper is selectively removed from the board to create the desired circuit pattern. This process involves several key steps.

First, the PCB is coated with a photoresist material, which acts as a protective layer. Then, the board is exposed to UV light through a film mask that contains the desired circuit pattern. The areas of the photoresist material that are exposed to UV light become hardened.

Next, the PCB is immersed in a chemical solution, such as ferric chloride, which selectively etches away the unprotected copper. The hardened areas of the photoresist material act as a barrier, protecting the copper underneath from being etched.

By following this process, the unwanted copper is effectively removed, and the desired circuit pattern is formed on the PCB. The resulting board is referred to as an etched printed board.

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