| 摘要 |
PROBLEM TO BE SOLVED: To prevent flashes/burrs 58 from projecting outer than a surface of a nozzle plate 11 at an outer periphery of the nozzle plate 11 of a head unit 6. SOLUTION: Before fixing the nozzle plate 11 having nozzles 11a formed in an array to a surface of a channel constituting body comprising a laminated body composed of a manifold plate, a spacer plate and a base plate of the head unit 6, a recessed groove 56 is preliminarily formed exactly in a shape of the outer periphery of the nozzle plate 11 into a material plate 60, and a step part 57 is formed by separating the nozzle plate along a bottom part of the recessed groove 56 by laser beam machining. Although flashes/burrs 58 project at bottom edges of the step part 57, leading ends of the flashes/burrs 58 are prevented from projecting outer than the surface of the nozzle plate 11. COPYRIGHT: (C)2003,JPO
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