US 12,257,841 B2
Water-repellent member, inkjet head, method of manufacturing water-repellent member, and method of manufacturing inkjet head
Norihiko Ochi, Kanagawa (JP); Junri Ishikura, Tokyo (JP); and Koji Sasaki, Chiba (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 22, 2022, as Appl. No. 18/145,368.
Claims priority of application No. 2022-002834 (JP), filed on Jan. 12, 2022.
Prior Publication US 2023/0219342 A1, Jul. 13, 2023
Int. Cl. B41J 2/14 (2006.01); B41J 2/16 (2006.01)
CPC B41J 2/1433 (2013.01) [B41J 2/164 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A water-repellent member comprising:
a substrate;
a base layer formed on the substrate;
projections dispersedly arranged on the base layer;
a first water-repellent material provided on the base layer in contact with the base layer; and
a second water-repellent material provided on the projections in contact with the projections,
wherein the first water-repellent material and the second water-repellent material include perfluoropolyether compounds, and
an oxygen concentration of the base layer is lower than an oxygen concentration of the projections.