In order to increase the production categories of our company and to put RGBW product into market as soon as possible

the key RGBW CF technology was researched. Firstly

through factory verification tests

the key process parameter differences of RGB-W thickness were decreased from the over coating (OC) material characteristics

OC thickness designations

and OC process conditions

etc. the data models of pixel pitch/OC thickness and differences of RGB-W thickness was established. Secondly

the connections among RGB-W thickness differences

cell gap

CCT and transmittance was figured out. The influential factors of OC Mura were analyzed and optimized to reduce quality risks of new technology's application. Finally

the analytical equipment like AOI

SEM

microscope

etc. were used to analyze the occurrence rate and the reason of foreign body to work out solutions based on material

process parameters and equipment parameters. The results show that the difference of RGB-W thickness is below 0.6

μ

m

and the CF yield is above 99.5%. This technology can met the requirements of the product quality and the stability of mass production.