Eaching apparatus with improved emission efficiency of eaching liquid

摘要

The present invention relates to an etching apparatus with improved discharge ability of an etchant. Accordingly, the technical aspect of the present invention is that one side of the inner protective housing is curved to smoothly discharge the etchant for etching the PCB in the etching apparatus so that the etchant can be drained into the drainage chamber along the curved surface and drained into the drainage chamber It has a feature that it can be gathered in an outdoor tank by a silver pump.