| 摘要 |
A printhead is provided having a plurality of chambers on a substrate which each have a nozzle, a heater arranged in each chamber so as to heat fluid within the chamber to form a gas bubble therein and thereby cause ejection of a drop from the corresponding nozzle, and a plurality of passages formed in the substrate so that each passage supplies the fluid to an associated one of the chambers. Each chamber is configured so that the transient rise in pressure therein when the gas bubble is formed is less than 20 MPa.
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