| 摘要 |
An inkjet printhead is provided having ink chambers on a first surface of a substrate. Each ink chamber has an ink ejection nozzle, a heater arranged so as to heat the ink to form a gas bubble and thereby cause ejection of an ink drop from the associated nozzle and ink supply passages formed in the substrate from an opposite, second surface of the substrate, so that each ink supply passage supplies ink to an associated one of the ink chambers. A length of the passages through the substrate from the second surface to the associated ink chambers is configured to prevent reverse ink flow into the passages after ink ejection. Each heater includes solid material and has a mass of less than 10 nanograms of the solid material, which is configured to be heated to cause formation of the gas bubble.
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