| 摘要 |
An ink-jet nozzle for use in an ink-jet printer with stable ink discharging characteristics and excellent machining capability and a method for manufacturing same are provided. The present ink-jet nozzle is generally in the shape of a disc provided with a through-hole in the center which serves as an ink passage. The disc has a double annular structure in which the inner annular portion has the Vickers hardness value in the range between 500 and 600, whereas the outer annular portion has a value approximately a half thereof.
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