BUBBLE JET (R) SYSTEM INK JET PRINT HEAD

摘要

PROBLEM TO BE SOLVED: To provide a bubble jet type ink jet print head exhibiting a high printing speed while utilizing energy of a generated bubble efficiently. SOLUTION: The bubble jet ink jet print head comprises a nozzle plate 110 provided with nozzles 160 for ejecting ink, a substrate 100 supporting the nozzle plate 110 and having an upper surface provided with heaters 140 each having a three-dimensional concave surface facing the nozzle 160, an electrode 170 provided on the upper surface of the substrate 100 and connected electrically with the heaters 140 in order to apply a current thereto, ink chambers 130 formed between the bottom face of the nozzle plate 110 and the surface of the heater 140 and being filled with ink, and an ink supply channel 150 formed between the nozzle plate 110 and the substrate 100 while communicating the ink chambers 130 in order to supply ink into the ink chambers 130.