| 摘要 |
An inkjet printhead is provided. The inkjet printhead includes an ink chamber filled with ink to be ejected, a nozzle through which the ink is ejected from the ink chamber, a manifold to supply the ink to the ink chamber, and a restrictor that connects the ink chamber and the manifold and includes a protrusion formed on an inner wall of the restrictor. A main heater is formed on an inner wall of the ink chamber and generates a main bubble in the ink chamber to eject ink and an auxiliary heater is formed on an inner wall of the restrictor and generates an auxiliary bubble to suppress the main bubble in the restrictor from expanding toward the restrictor. Thus, a refill speed of the ink to the ink chamber is increased and a driving frequency of the inkjet printhead is also increased.
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