Method of manufacturing an ink-jet recording head using a thermally fusible film that does not close communication holes

A method for manufacturing a laminated ink-jet recording head, comprising steps of:

• fixing an actuator unit to a first surface of an ink supply port forming substrate by employing a first thermally fusible film;
• fixing a common ink chamber forming substrate to a second surface of said ink supply port forming substrate by employing a second thermally fusible film;
• fixing a nozzle plate to a surface of said common ink chamber forming substrate by employing a third thermally fusible film wherein said first, second and third thermally fusible films have windows therein, at areas other than areas to be an ink flow passage defined by laminating said actuator unit, said common ink chamber substrate, and said nozzle plate;
• supplying an adhesive mixed with a gap material into the windows in said first, second and third thermally fusible films;
• and
• fusing said first, second and third thermally fusible films whereby a thickness of each of said first, second and third thermally fusible films is substantially constant, and communication holes in said ink supply port forming substrate and said common ink chamber forming substrate are not closed by said first, second and third thermally fusible films.