Researchers from Shanghai Jiao Tong University together with UK-based OTFT developer SmartKem published a new paper describing the use of via interconnections in an organic-last integrated microLED display. The researchers report that the low-defect organic semiconductor backplane enables excellent performance.
As part of the project, the researchers demonstrated a 254 PPI active-matrix microLED display that achieves a brightness of 150,000 nits. The transistors exhibit superior performance in terms of milliampere driving current, and large ON/OFF current ratio approaching 1010 with excellent uniformity and reliability
An organic-last integrated display process means that the organic multi-layer OTFT backplane is deposited directly on the microLED wafer to create the display. The via process is proposed to make the via interconnection after fabrication of the organic thin-film transistor.