Abstract
A mask-free inkjet printing (IJP) process has been developed to fabricate
color filters. The coffee ring effect was used to create a ring-edged bank
array with fine structures by IJP of poly(methylmethacrylate). After the color
filtering inks were deposited in the banks, a color filter panel was made
without any transitional photolithography process. The resulting color coordinates
of the three primary colors on the chromaticity diagram are (0.70, 0.30),
(0.33, 0.60) and (0.14, 0.09), respectively, covering 67.8% of the National
Television System Committee standard. This process can be used with flexible
substrates to produce low-cost inkjet printed color filters.
© 2009 IEEE
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