An etching agent is a chemical used in the semiconductor etching process to selectively remove or strip away the target film layer, creating a designed pattern. Wet etching is one of the most important techniques used in this process, relying on a chemical reaction between the etching agent and the target film layer to achieve precise results. Each type of film layer has a specifically tailored etchant to ensure optimal performance. Applications Etching agents are primarily used in two key industries: integrated circuit manufacturing and flat panel display production.