Ink-jet recording head, recording element substrate, method for manufacturing ink-jet recording head, and method for manufacturing recording element substrate

A method for manufacturing an ink-jet recording head including a recording element substrate formed on a supporting member, the method comprising:npreparing the recording element substrate, the substrate having an ejection pressure generating element disposed on a main surface of the substrate configured to generate pressure for ejecting ink, a side surface of the main surface being at least partially subjected to etching;bringing the etched side surface of the recording element substrate into contact with a positioning portion configured to position the recording element substrate; andfixing the recording element substrate to the supporting member while the etched side surface of the recording element substrate and the positioning portion are in contact with each other.

A method for manufacturing an ink-jet recording head, the method comprising:npreparing first and second substrates, each including a first surface having an energy generating element for generating energy used for ejecting a liquid and a second surface intersecting with the first surface, at least a part of the second surface being formed by dry etching; andfixing the first and second substrates onto a supporting substrate so that the second surface of the first substrate and the second surface of the second substrate are opposed to each other.