Patent ID: 8512935
Filing Date: 2013-08-20
Classification: G03F

Abstract:
1. A formulation for a hydrophobic photoresist coating to be applied to a surface of a printhead, the formulation comprising: an epoxidized perfluoropolyether having epoxy functional groups; a photoacid generator chosen from metallic onium salts and non-metallic onium salts; a fluorinated organic solvent present in a first amount and being capable of dissolving at least the epoxidized perfluoropolyether; and a fluorinated organic co-solvent present in a second amount and being capable of dissolving at least the photoacid generator, the second amount being less than the first amount; wherein the hydrophobic photoresist coating formulation is to retain its hydrophobicity during and after being formed into the hydrophobic photoresist coating by: