The production process of LCD screen is as follows: Primary cleaning→coating (PR positive photoresist)→drying→exposure→development-hardening film-etching-stripping-secondary cleaning→PI coating→pre-baking→PI curing→friction→screen printing (silver dot, powder spraying, frame, Pre-baking)→combination→pre-pressing inspection→baking→cutting→filling crystal→sealing leveling→small crack→edge grinding→cleaning→visual inspection→electrical measurement→screen printing→patch-loading PIN→electrical testing→packaging
