| 摘要 |
An ink jet recording head includes a recording element substrate having an array of discharge ports and a side surface extending along an array direction of the discharge ports, and an opposite surface facing the side surface. A minimum distance is provided between the opposite surface and the side surface at least at a center portion of the side surface. Also, a distance greater than the minimum distance is provided between the opposite surface and the side surface at an end portion of the side surface in the array direction.
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