Mask is mainly used to shield the charged or uncharged conductor parts. The precision metal mask here is used for OLED evaporation process, through the holes in the precision metal mask to penetrate the three kinds of color evaporation materials, and accurately define the position shape size on the glass substrate.

So how is the manufacture of precision metal masks? Zollida etching will use the current mainstream etching production method, through the metal exposure development process, in the metal metal substrate through the use of chemicals in the way of film to create a hollow area, in the use of etching process to make a depression area, through the upper and lower sides of the depression area for re-etching to create a carved through the hole. The main reason is that there is a certain slope between the main surface and the side wall of the hole opening to form a sharp point, and the error of the etching time and the concentration of the chemical easily leads to a large difference in the precision of the hole size. These two process disadvantages can not meet the demand, so the most direct way is still etching production method, Zhuo Li Da in the etching industry to pursue excellence, and constantly break through the technical limits of the successful practice of precision metal mask production.