Patent ID: 7980656

Claim:
A liquid ejection head having an ejection opening for ejecting a liquid, comprising: a substrate; a heat generating portion for generating thermal energy used for ejecting the liquid from the ejection opening, the heat generating portion being provided on the substrate; a first layer that is provided on said heat generating portion and is made of an insulating material; a second layer that is provided on said first layer in a laminated condition and is made of a metallic material; and a member that is provided so as to be in contact with said second layer, forms a liquid path communicating with the ejection opening, and is made of a resin, wherein each of at least two portions of said second layer, one of which corresponds to said heat generating portion and the other of which is in contact with said member, contains iridium (Ir) and silicon (Si), or contains ruthenium (Ru) and silicon (Si).