SemiQuartz Wafer announces new glass substrates that are suited for OLED production. The company says that these new substrate are better than what's currently on the market: total thickness variation is less than 2 micrometers and the roughness is less than .3 nanometers. The new substrates are now available.
A low thickness variation is important as any variations can lead to color shifts, non-uniform brightness and even short-circuit of an individual pixel which could hard the OLED lifetime. Studies conducted by SemiQuarz Wafer revealed OLED malfunctions when the substrate’s permeation rate exceeded 1 x 10-6 g/m2 per day 25 degrees Celsius. In addition, the substrate must also meet specific requirements in terms of chemical resistance, temperature stability and moisture sensitivity.
