| 摘要 |
A nozzle is provided for an inkjet printhead. The nozzle includes a wafer assembly defining an ink supply channel. A chamber roof layer is supported by the wafer assembly. The chamber roof layer defines a nozzle chamber in fluid communication with the ink supply channel and a nozzle aperture through which ink in the nozzle chamber can be ejected. A thermal actuator is sandwiched between the wafer assembly and the chamber roof layer. The thermal actuator includes a heater element which, upon actuation, ejects ink from the nozzle chamber out through the nozzle aperture. The chamber roof layer defines an external patterned surface surrounding the nozzle aperture, the patterned surface being configured to inhibit dust particles from sticking to the chamber roof layer.
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