What are the issues that need attention when etching processing of optical inks？The problems that should be paid attention to in the process of using the photosensitive ink during etching are mainly the following points:1. Drying temperature and time: In order to achieve the effect of the coating, y

Improve the uniformity of the etch rate across the board surfaceThe etching uniformity of the upper and lower sides of the board and each part of the board is determined by the uniformity of the etchant flow on the board surface. During the etching process, the etching rates of the upper and lower p