Samsung Mobile Display want to use for the organic materials deposition process a new process called LITI Laser-induced thermal imaging process instead of Fine-Metal-Mask (FMM). At the 5.5G A2 P3 line SMD want to use the LITI Laser-induced thermal imaging process which suggest higher resolution AMOLEDs.
3M has partnered with Samsung to jointly develop that kind of process for AMOLEDs.
Laser Induced Thermal Imaging allows for high-resolution patterning of a variety of materials that often cannot be patterned efficiently by other conventional techniques such as photolithography. Application of LITI towards patterning vacuum-coated OLED materials is particularly attractive because of high LITI patterning resolution and accuracy and good compatibility of vacuum-coated OLED materials. LITI may induce thermal transfer defects within OLED materials.
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With LITI process Samsung can achieve AMOLEDs with 300ppi
Fine-Metal-Mask (FMM) is much more expensive than LITI and with FMM the manufactuerer can only produce panels with a 200ppi resolution as it has a printing accuracy of about 15 micro meters. Liti uses lasers with about 2.5 micro meters and the method is cheaper too.