Patent ID: 7153459

Claim:
A method of manufacturing an ink jet type recording head, which includes a passage unit having a passage forming substrate provided with an ink passage, the method comprising: molding the passage forming substrate in a resin for partitioning the ink passage and a reinforcement as a core of the passage forming substrate, using a mold; and connecting a vibrating plate on a side of the passage forming substrate; wherein the molding comprises applying the resin and the reinforcement to a first mold of the mold having a cavity formed in conformity with an external shape of the passage forming substrate and setting a plate-shaped second mold of the mold on the first mold; wherein the cavity has a portion formed in conformity with an external shape of a nozzle opening to integrally form the nozzle opening with the passage forming substrate; wherein the setting further comprises providing a clearance between the first mold and the second mold to thereby form a resin cover portion over the nozzle opening; and wherein the molding further comprises removing the resin layer to expose the nozzle opening.