| 摘要 |
The liquid ejection head includes: a substrate made of a prescribed material on which a thin film is deposited to constitute a diaphragm; a piezoelectric body which is formed on a face of the diaphragm reverse to a face adjacent to the substrate; and a pressure chamber which is formed on the substrate by etching in a plurality of steps from a side reverse to a side adjacent to the diaphragm and has a difference in width thereof.
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