| 摘要 |
PROBLEM TO BE SOLVED: To provide a constitution by which whether flat plates stuck in exact positions or not can be easily judged in an ink jet head of a flat plate laminated structure. SOLUTION: In the ink jet head formed by laminating a plurality of flat plates 21 to 29, circular holes 71 to 79 are coextensively formed in orientations of flat plate thickness at centers coincident to each other in the shape of penetration. When the flat plates 21 to 29 are laminated, contour lines of the circular holes 71 to 79 formed in the flat plates 21 to 29 are constituted so as to be visually recognized from one side of the ink jet head. The circular holes 71 to 79 are formed by etching. COPYRIGHT: (C)2004,JPO
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