Following The two substrates are bonded, possibly an ultraviolet (UV) beam is directed, or heat or perhaps a stress is partly applied the sealant among the initial and second substrates 510 and 520, for environment the sealant to repair the 1st and second substrates 510 and 520 (stage 5S in https://jiutustore.com/collections/optical-bonding-machine/Optical-Bonding-Machine