Patent ID: 7365022

Claim:
A method of forming a sub-pixel frame for a color filter, comprising the steps of: depositing a phase change material over a substrate; the phase change material deposited using a printing system comprising a printhead; the printhead including at least one ejector for ejecting the phase change material in liquid phase; the phase change material deposited in a first printed pattern such that the first printed pattern of phase change material remains following a change from liquid phase to solid phase of the phase change material; the first printed pattern defining gaps; depositing a hydrophilic black matrix material; the black matrix material deposited using a printing system comprising a printhead; the printhead including at least one ejector for ejecting the black matrix material in liquid phase; the black matrix material deposited in a second printed pattern such that the black matrix material is selectively introduced into the gaps defined by the first printed pattern; heating the hydrophilic black matrix material such that the hydrophilic black matrix material hardens to form hydrophilic black matrix material features; depositing a supplementary hydrophobic black matrix over the hydrophilic black matrix material; and removing the phase change material, leaving the hydrophilic black matrix features with supplementary hydrophobic black matrix material thereover on the substrate.