Patent ID: 8097118

Claim:
A method for manufacturing a liquid ejection head having an ejection port-forming member in which an ejection port configured to eject liquid is formed, comprising the steps of: (a) preparing a substrate including: a base substrate; a first layer composed of a resin composition containing a compound that can be polymerized by irradiation with active energy rays under the presence of a polymerization initiator, and without a polymerization initiator, the first layer being formed on the base substrate; and a second layer composed of an active energy ray-curable resin composition containing the polymerization initiator, the second layer being formed on the first layer; (b) pressing a mold, on which at least a pattern of the ejection port has been formed, against the first layer and the second layer; (c) irradiating the second layer with the active energy rays through the mold or the base substrate using a mechanism that selectively blocks the active energy rays applied to a portion corresponding to the ejection port, the portion being disposed on the mold or the base substrate, while the mold is being pressed against the first layer and the second layer; (d) performing post-exposure baking to cure the second layer irradiated with the active energy rays and to form a cured portion in the first layer at a part into which reaction sites of a polymerization reaction in the second layer have diffused, the rest of the first layer being left as an uncured portion; (e) removing the mold; (f) bonding the second layer to another supporting substrate; and (g) detaching the base substrate by dissolving the uncured portion of the first layer.