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Color
filter coatings are applied in a multi-step process. In each step of the
process the requirements to the coating changes. The color resist
contains organic solvents, in which it has to have an excellent
solubility when it is applied on the glass panel. But it also must have
a good water-solubility as in the developing step later on in the
application process when a part of the dried, non-cured coating is
removed with an aqueous solution in order to create the pixel pattern of
the display.
To
achieve these different solubility properties of the color resist the
selection of the wetting and dispersing additive plays an important
role. The presentation will discuss different strategies how to
influence the solubility properties of the color resist with wetting and
dispersing additives. |