| 摘要 |
PURPOSE: To improve the printing quality and the yield and to reduce the cost by improving the accuracies of the size and the shape. CONSTITUTION: A board 1 is punched from a plastic sheet, and further an ink pressurizing chamber 4, an ink supply passage 5 and an ink reservoir 6 are punched as through holes. A filter channel 7 is formed as a fine channel of about several tens ofμm by processing between the passage 5 and the reservoir 6 with an excimer laser. An ink nozzle 3 communicates with tip of the chamber 4. The board 1, a nozzle plate and a diaphragm are all punched from a polyetherimide sheet of crystalline thermoplastic resin material. The punched members have no warpage and no 'waviness', and high flatness. Of course, a correcting work for flattening after the punching is eliminated. In general, the yield is improved.
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