Canon Kabushiki Kaisha

Narumi Shinohara

Kenji Fujii

Satoshi Ibe

Junichiro Iri

Hiroyuki Murayama

Takanobu Manabe

A recording element substrate includes an ejection port forming member in which an ejection port configured to eject liquid is formed, and a substrate. The substrate includes a liquid supply port that supplies the liquid to the ejection port, a first surface on which the ejection port forming member is placed, and a second surface that is a rear surface of the first surface. The liquid supply port includes a first portion perpendicularly connected to the first surface, and a second portion connected to the first portion. An inner wall of the second portion includes an inclined surface that is inclined toward an inner wall of the first portion such that a width of the second portion is gradually increased toward the second surface. A hydrophilic film is formed at least on the inner wall of the first portion.

Growing community of inventors

Kanagawa, Japan

Narumi Shinohara