Improvement of evaporating efficiency for OLED mass-fabrication

For the evaporation process, thickness uniformity is of great practical importance. And, it is commercially significant to improve the efficiency of material of the evaporant which is deposited on the substrate because of high price of organic materials. To achieve the better thickness uniformity and the higher evaporating efficiency, Samsung SDI has introduced the new concept of the asymmetric evaporation technology for depositing evener and cheaper organic layers. Based on the developed method, the uniformity of the organic layer thickness can be successfully controlled. Furthermore, the very high efficiency may allow the OLED displays be manufactured with the lower cost.