Liquid ejection head and manufacturing method of liquid ejection head

Abstract

The liquid ejection head including a first liquid ejection module and a second liquid ejection module, each including a printing element substrate having an ejection surface on which a plurality of ejection port rows ejecting liquid is formed and a protection member having an opening corresponding to the ejection port row, and the ejection surface and the protection member are bonded to each other with a bonding adhesive, a space between the first liquid ejection module and the second liquid ejection module is sealed with a sealing member, and on a surface on the opposite side of a surface bonded to the ejection surface with the bonding adhesive, at least one side of the protection member, which is in close proximity to the sealing member, is made water repellent.

Dependencies are inferred from the claim text.