PROBLEM TO BE SOLVED: To provide a green photosensitive colored composition having high reliability while eliminating color changes due to irradiation with light, which is a problem upon using a halogenated zinc phthalocyanine pigment for a color filter of a liquid crystal display device, to provide a color filter using the green photosensitive colored composition and to provide a liquid crystal display device including the color filter.

This invention provides a positive photo-sensitive resin composition having storage stability, especially excellent in photo-sensitive stability, and the composition can form a curing film having excellent adhesive property with a substrate after a high temperature heating process of 350 DEG C or more, or after a heating process in the air. The positive photo-sensitive resin composition of this invention includes: (a) a polymer having a specific polyimide precursor and/or a polymer having a spec...

PROBLEM TO BE SOLVED: To provide a zinc phthalocyanine pigment composition suitable as a colorant capable of giving a colored article of stronger blue as compared with conventional zinc phthalocyanine pigments, and a suitable method for producing the same.

PROBLEM TO BE SOLVED: To provide an etchant for copper oxide, selectively dissolving only one type of copper oxide when copper oxides with different oxidation degrees are present, and to provide an etching method for copper oxide by using the etchant.

PROBLEM TO BE SOLVED: To provide a photosensitive coloring composition for obtaining a pattern having excellent linearity and not causing a defect, wherein light resistance and solvent resistance of the obtained colored pattern are excellent.

PROBLEM TO BE SOLVED: To provide a liquid crystal display device having high luminosity and high contrast and free from display defect such as image burning and to provide a green photosensitive resin composition used for manufacture of the liquid crystal display device.

PROBLEM TO BE SOLVED: To provide a green pigment dispersion element for a color filter which is superior in long-term storage stability and has viscosity increase with time and deterioration in contrast ratio suppressed, to provide a green-colored resist containing the dispersion element, and to provide a color filter superior in oblique visibility and a liquid crystal display device.

PROBLEM TO BE SOLVED: To solve such a problem that it is difficult to stably disperse a zinc phthalocyanine halide pigment while maintaining its excellent color characteristics only by using a dispersant which is suited for a conventional copper phthalocyanine halide pigment or any other pigment for the zinc phthalocyanine halide pigment, because it is well known that the zinc phthalocyanine halide pigment is a pigment which is difficult to be dispersed, as chemical properties of the zinc phthal...

PROBLEM TO BE SOLVED: To obtain a colored photosensitive composition which is used to form a green colored pattern in a color filter, has excellent curability and a large development latitude in the formation, reduces pattern defects in development, and can suppress crystal deposition of a photopolymerization initiator.