Theoretical analysis of one possible cause of the droplet volume variation for the fabrication of a TFT LCD color filter with the piezo DOD inkjet printing technology

잉크젯을 이용한 TFT LCD 컬러필터 제작에 있어 잉크액적 부피 편차에 대한 이론적 해석

TFT LCD industries have endeavored to adopt the piezo Drop-On-Demand (DOD) inkjet printing technology to production lines of TFT LCD color filters and these efforts have significantly been based on experimental works. Because the degree of complexity in the piezo DOD inkjet printing technology results in too many combination of parameters, the matrix experimental method to investigate all possible sets of parameters becomes ineffective and hence the basic understanding of the piezo Drop-On-Demand inkjet print technology becomes important. In this study, one possible cause of the droplet volume variation across nozzles, which might cause visible swathe marks on an inkjet patterned TFT LCD color filter, is theoretically investiaged and new R&D directions are suggested.