| 摘要 |
An inkjet head includes a recording element substrate for discharging ink, a supply port penetrating the recording element substrate and serving as an ink flow path, a protrusion formed at a position surrounding the supply port, projecting from one surface of the recording element substrate, and having a first metal layer at a distal end, and a supporting member having a second metal layer welded with the first metal layer and supporting the recording element substrate.
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