Selection Of Etching Method

The choice of etching method: There are mainly two types of metal etching methods based on the contact form between the workpiece and the solution, namely spray type and immersion type. There are two principles for selecting etching methods.
(1) Production volume: Spray etching has high efficiency, fast speed, and high precision, suitable for production in certain batches. It is easy to achieve automated control in production, but the equipment investment is large, and it is not suitable for etching opposite and large workpieces. Immersion etching equipment has small investment, convenient etching, and a wide range of applicable workpieces, but it is not suitable for large-scale production. At the same time, immersion etching has slower speed and relatively lower efficiency than spray etching, and the production process is not easy to achieve automated control.
(2) Workpiece shape and size: Due to equipment limitations, spray etching is difficult to perform on large workpieces, while immersion etching is not affected by workpiece size. The shape of the workpiece is complex, and some parts may not be able to be sprayed during spraying, which affects the normal production of etching. However, the immersion type is to immerse the entire workpiece in the etching solution. As long as the dynamics between the etching solution and the workpiece are maintained, it can ensure that all parts of the opposite sex workpiece can be filled with etching solution and continuously replaced with new and old solutions, so that etching can proceed normally.
For small or nearly flat workpieces, if conditions permit, spray etching is superior to immersion etching in terms of efficiency and accuracy. Therefore, for workpieces with large batch sizes, moderate workpiece sizes (depending on the equipment), and simple planar shapes, spray etching is preferred; If the shape of the workpiece is relatively large and difficult to use an etching machine, and the shape of the workpiece is complex and the batch size is not large, it is advisable to use immersion type.