Patent ID: 8163187

Claim:
A process of producing a liquid discharge head including a substrate, a passage-forming member for forming a passage that communicates with a discharge port for discharging a liquid, and a patterned layer that is made of a resin disposed between the passage-forming member and the substrate so as to be in contact with the passage-forming member and the substrate and has a pattern corresponding to the shape of the passage-forming member, the process comprising: providing a resin layer on a substrate; providing a resist pattern on the resin layer for patterning the resin layer; forming a patterned layer by patterning the resin layer using the resist pattern as a mask; providing a layer for forming a passage pattern having a shape of passage on the resist pattern lying on the patterned layer; forming a passage pattern by patterning the layer for forming a passage pattern; removing the resist pattern; providing a passage-forming member so as to cover the passage pattern and the patterned layer; and removing the passage pattern to give the passage.