Patent ID: 6877225

Claim:
A method of manufacturing an ink jet head having a substrate and a ceiling member joined to said substrate, wherein said substrate includes a plurality of energy generating elements for generating energy utilized to discharge ink, and wherein said ceiling member has a plurality of flow passage walls which define a plurality of flow passages when said substrate is joined to said ceiling member, the energy generated by said energy generating elements acting on the ink to discharge the ink through the plurality of flow passages, said method comprising the steps of: providing a plurality of recessed portions in a surface on said substrate such that said plurality of recessed portions have a bottom surface located at a position which is lower than a position of a heat acting surface of said substrate; and fitting said plurality of recessed portions to said flow passage walls of said ceiling member by applying a force to said ceiling member along a direction in which said plurality of energy generating elements are arranged, thereby causing said ceiling member to move in the direction in which said plurality of energy generating elements are arranged, so as to align said flow passages with said energy generating elements.