| 摘要 |
<p>PROBLEM TO BE SOLVED: To eject a markedly small ink drop and to improve the arrival accuracy of the ink drop. SOLUTION: An inorganic material such as SiO2, TiO2 and ZrO2 is dissolved into a solvent including an alkoxide, methoxide, proxide, n-methylpropiden, or the like and a dissolution material of the solvent and an epoxy photosensitive resin is subjected to spin-coating on a metallic substrate 9 to be prebaked to form a first layer 10. An epoxy positive type photosensitive resin is applied on the first layer 10 to form a second layer 11. The exposing by ultraviolet rays is applied thereto by using a mask 22 that allows an exposing light to pass through only a region in a diameter of an ejection nozzle 3. The exposing by ultraviolet rays is further applied thereto by using a gradation mask 23 having a gradation section 25. Next, the exposed section is removed and a curing treatment is executed. Finally, the metallic substrate 9 is dissolved by diluted hydrochloric acid or the like to obtain an orifice plate 1 having the ejection nozzle 3 in which a straight line section 12 and a curve section 14 are formed.</p> |
