Patent ID: 8227043

Claim:
A method for manufacturing a liquid discharge head including a substrate, on which is arranged an energy generating element to generate energy used to discharge liquid from a discharge port, and a flow path communicating with the energy generating element and the discharge port, the method comprising the steps of: providing a positive type photosensitive material layer containing a copolymer of methacrylic acid and methacrylate ester on the substrate in a diglyme solvent; forming a solid layer for forming the flow path from the positive type photosensitive material layer on the substrate; forming, on the substrate where the solid layer is formed, a coating resin layer containing a cationically polymerizable resin, a basic material having a pair of nonshared electrons and a solvent containing xylene and methyl isobutyl ketone for coating the solid layer, the basic material selected from the group consisting of diethanolamine, triethanolamine, triisopropanolamine, a pyrimidine compound, a pyridine compound, and aminophenol; forming the discharge port, through a photolithographic process, in the coating resin layer formed on the solid layer; and removing the solid layer to form the flow path.