| 摘要 |
<P>PROBLEM TO BE SOLVED: To cover and protect a nozzle hole so as to give durability to the nozzle hole against alkaline ink (ejection liquid). Ž<P>SOLUTION: A nozzle substrate 1 includes a plurality of nozzle holes 11 each having a nozzle portion 11a for ejecting a liquid droplet and an introduction portion 11b which has a cross sectional area greater than that of the nozzle portion and is formed to be coaxial to the nozzle portion. A plurality of layers of ejection liquid resistance protection films 12 to 14 are formed on at least the inner wall of the nozzle hole 11. Ž<P>COPYRIGHT: (C)2009,JPO&INPIT Ž |
