Faulty products that were being thrown out after issues in the adhesion process when making flexible OLED display modules can now be recovered thanks to new reprocessing equipment. Professor Kwan-young Han’s (Department of Display Engineering) team and ZEUS, a company specializing in display semiconductors, successfully developed reprocessing equipment that uses OCA (Optically Clear Adhesive) to save defective products that would have otherwise been discarded in the high efficiency flexible OLED display module manufacturing process.
Flexible OLED Display modules go through a process where OCA is used between panels and tempered glass. The development of the new reprocessing equipment is expected to bring innovation as defective products resulting from adhesive errors, such as design flaws, process variations, insertion of foreign substances, or air pockets have been discarded until now, triggering massive losses.
Through two years of industry-academia joint research, the two organizations succeeded in securing optimal process conditions to separate defectively adhered products conveniently without damage and clean and reproduce tempered glass from the defective product by using the new equipment. Technology to reprocess the separated panel is also projected to be completed within six months. The equipment, made with 100% domestic technology, boasts outstanding productivity that processes individual units within 30 seconds.
“The reprocessing equipment has made it possible to convert modules with adhesive defects into quality products instead of being discarded like in the past, contributing to significant improvement in production costs and yield,” said professor Han who added that “applications for 10 technology patents have been filed in relation to the new development.”