Patent ID: 8888244

Claim:
An inkjet printing apparatus comprising: a path substrate including a pressure chamber; a nozzle substrate below the path substrate and including a nozzle for discharging ink; and an actuator providing a driving force for discharging ink in the pressure chamber through the nozzle, the nozzle substrate including: a first nozzle substrate having a first tapered nozzle unit aligned with the pressure chamber; a second nozzle substrate below the first nozzle substrate and having a second tapered nozzle unit aligned with the first tapered nozzle unit, the first tapered nozzle unit and second tapered nozzle unit forming the nozzle such that the nozzle has a tapered shape; and a nozzle wall that forms a boundary of the nozzle and the first and second nozzle substrates, wherein, the second nozzle substrate has a stepped surface stepped from a bottom surface thereof toward a top surface thereof around the nozzle, the second tapered nozzle unit penetrates through the stepped surface, and the nozzle wall extends from an inside of the nozzle substrate toward the bottom surface of the second substrate across the stepped surface while maintaining the tapered shape to form an outlet of the nozzle at an end of the nozzle wall.