Process and material for color filter preparation in liquid crystal display.

The color filter for liquid crystal display(LCD) has been developed about 7 years ago in order to fabricate poli-silicon-TFT active matrix LCD. The CF for CCD was popular at that time, but the different characteristics had to be given to the LCD-CF owing to producing good color reproducibility on Pocket Color LCTV. Nowadays, the large size CF is required for the Lap-Top computer display, this size will be more than 10 inch diagonal. Many kinds of CF have been generated for the LCD applications, however, the ideal CF that is applied for all kinds of LCDs is not still be developed, so the situation of the CF market is very complicated now. We LCD makers have several problems to fabricate those large size CF on the high yield, because the severe color uniformity and low fabrication cost are required as indispensable condition. In addition to that, very strict surface flatness on CF is necessary for performing good image quality. In this paper, I will explain about recent state of development about the CF for the active and the non-active LCDs.