Micro-fabrication of color filter for liquid crystal display by inkjet-based method

摘要

This paper explored a new micro-fabrication design of color filter for liquid crystal displa , which was based on the so-called ink-jet technology today. Technicall, a new type of micro-fluidic method was presented to realize the most important manufacturing steps of color filter that specific red, green, and blue ink droplets generated from the drop-on-demand jet heads could be accuratel deposited onto a transparent substrate. Physicall , those droplets were automatically formed very thin color films because of natural liquid surface tension between the droplets and substrate. To obtain the desired thickness of color film, high walls were made on the surface of the substrate to allow the droplets freely flow in essential one dimension under constraint of two neighboring walls before the film forming and drying. As a result, a color filter with desired striped pattern we designed could be simply completed; for example, the droplets of 60-micrometer diameter might be expected to yield a 110-micrometer by 110-micrometer pixel of color filter with color thickness of one micrometer . By comparison with current pigment-dispersed method, we estimated that similar chromatic performance in the final product could be achieved with much low cost and short manufacturing process in the presented method herein.