Patent ID: 7854065

Claim:
A manufacturing method, for a liquid discharge head that includes a discharge port forming member, where discharge ports for discharging liquid are formed, and liquid flow paths that communicate with the discharge ports, comprising the steps of: mounting, on a substrate, a first side wall forming member for forming portions of side walls of the liquid flow paths; mounting, on the first side wall forming member, a first photosensitive material layer that serves as a second side wall forming member for formation of other portions of the side walls and is supported on another substrate, wherein an adhesive agent to be foamed by light irradiation is located between the other substrate and the first photosensitive material layer; exposing the first photosensitive material layer and the adhesive agent to light that has passed through the other substrate to foam the adhesive agent; removing the other substrate from the first photosensitive material layer; patterning the first photosensitive material layer to provide the second side wall forming member by removing a portion of the first photosensitive material layer which has not been exposed; forming, on the second side wall forming member, a second photosensitive material layer that serves as the discharge port forming member; and patterning the second photosensitive material layer to provide the discharge ports.