Abstract: The invention provides an active energy ray curable ink jet recording liquid composition including a radically polymerizable compound, an active energy ray polymerization initiator, a wax and water, wherein the melting point of the wax is 40° C. or more and 120° C. or less.

Abstract: A method for manufacturing a liquid discharge head including an energy generating element, which generates energy utilized for discharging a liquid, and a discharge portion provided at a position facing the energy generating element and having a discharge port for discharging the liquid is provided. This method includes the steps of forming a negative photosensitive resin layer used for a member that forms the discharge port on the substrate, and exposing the layer to an i-line to form the discharge portion that is tapered in a direction from the substrate to the discharge port, wherein the layer has an absorbance per 1 ?m thickness of about 0.02 to about 0.07 for light used for the exposure.

Abstract: The invention provides an aqueous liquid composition containing a water-soluble monomer, a photopolymerization initiator and an aqueous medium and further containing a polymer emulsion, wherein the water-soluble monomer is a monomer that has two or more ethylenically unsaturated bonds and is curable with an active energy ray.

Abstract: The present invention provides a positive photosensitive resin composition which can form a cured film excellent in process resistance such as heat resistance, solvent resistance or long-time baking resistance and transparency, and which is excellent in photosensitive properties such as resolution and sensitivity, and which has high storage stability and a wide process margin. Further, the present invention provides a positive photosensitive resin composition having such high reliability that no deterioration of electrical characteristics will be led in its application for liquid crystal display devices.

Abstract: A polyfunctional epoxy compound, represented by a formula (I), comprising a nucleophilic organic group A having a nucleophilic group other than an epoxy group, and an epoxy-containing group B having an epoxy group: A-R?B)n??(I) wherein R represents an organic group of (n+1) valence, and n represents 2 or 3.

Abstract: The invention provides an active energy ray curable liquid composition containing a compound represented by a general formula (I): wherein A is a hydrogen atom or a monovalent organic residue which may be substituted, R1 and R2 are, independently of each other, a divalent organic group which may be substituted, E is an amide bond, Rn is a cyclic linking group having a carbonyl group and an unsaturated carbon-carbon bond adjacent to the carbon atom of the carbonyl group, m is a number of 0 or greater, n is a number of 2 or greater, m+n is 3, and Z is a secondary or tertiary amino bond structure, with the proviso that the amino bond may be a salt of a secondary or tertiary amine, and a liquid cartridge.

Abstract: A method of manufacturing a liquid ejection head includes a step of forming a layer of a positive-type photosensitive resin on a substrate; a step of forming a pattern, used to form a liquid channel, by exposing the positive-type photosensitive resin layer to light; a step of forming a photosensitive layer, used to form a discharge port-forming member, on the pattern; and a step of forming a discharge port in such a manner that the photosensitive layer is patterned by exposing the photosensitive layer to i-line. The pattern has a predetermined absorbance for i-line and contains a specific compound.

Abstract: A liquid discharge head having a substrate provided with energy generating elements for generating energy to discharge a liquid, discharge portions including discharge ports for discharging the liquid, and flow paths supplying the liquid to the discharge portions and a method for its manufacture are provided. The method includes the steps of forming a layer of a negative type photosensitive resin on the substrate, and exposing the layer to light having a wavelength of 365 nm to form the discharge portions.

Abstract: A method for manufacturing a liquid discharge head including an energy generating element, which generates energy utilized for discharging a liquid, and a discharge portion provided at a position facing the energy generating element and having a discharge port for discharging the liquid is provided. This method includes the steps of forming a negative photosensitive resin layer used for a member that forms the discharge port on the substrate, and exposing the layer to an i-line to form the discharge portion that is tapered in a direction from the substrate to the discharge port, wherein the layer has an absorbance per 1 ?m thickness of about 0.02 to about 0.07 for light used for the exposure.

Abstract: The present invention provides a positive photosensitive resin composition which can form a cured film excellent in process resistance such as heat resistance, solvent resistance or long-time baking resistance and transparency, and which is excellent in photosensitive properties such as resolution and sensitivity, and which has high storage stability and a wide process margin. Further, the present invention provides a positive photosensitive resin composition having such high reliability that no deterioration of electrical characteristics will be led in its application for liquid crystal display devices.