| 摘要 |
PROBLEM TO BE SOLVED: To carry out printing of a high quality by an inkjet head whose strength is maintained while permeation of an adhesive into an ink passage is regulated. SOLUTION: A passage unit included in the inkjet head consists of a laminate of a plurality of plates where communication holes to be a part of the ink passage are formed. At a nozzle plate 31 constituting one outermost layer included in the passage unit, an annular groove which regulates permeation of the adhesive into the ink passage is formed in none of top and bottom faces. At each plate including a cover plate 30 held between the nozzle plate 31 and a cavity plate 22 which constitutes the other outermost layer included in the passage unit, an annular groove is formed only in a face near the nozzle plate 31. COPYRIGHT: (C)2007,JPO&INPIT
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