| 摘要 |
With the liquid discharge head, a discharge speed of liquid droplets is increased, a discharge amount of liquid droplets is stabilized, and a discharge efficiency of the liquid droplets is enhanced. A bubbling chamber has a first bubbling chamber which is connected to a supply path with a main surface of an element substrate forming a bottom surface thereof and in which bubbles are generated in ink by a heater, and a second bubbling chamber connected to the first bubbling chamber. Moreover, a nozzle has a discharge port portion including a discharge port connected to the second bubbling chamber. Assuming that an average sectional area of the first bubbling chamber is S1, an average sectional area of the second bubbling chamber is S2, and an average sectional area of the discharge port portion is S3 in sections parallel to the main surface of the element substrate, the nozzle satisfies a relation of S2>S1>S3.
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