Liquid ejection head and method of producing the same

A liquid ejection head comprising:

• a substrate configured to form a channel for a liquid to be ejected;
• an ejection port formation member configured to form an ejection port, the liquid having passed through the channel being ejected via the ejection port;
• a cover member configured to bond to the ejection port formation member at an opposite side to the substrate via an adhesive;
• and
• a thin film formed on a face of the cover member, the face being on a side where the cover member is bonded to the ejection port formation member, the thin film containing silicon carbide, or any of carbon-containing silicon oxide, silicon nitride, and silicon oxynitride,
• wherein the ejection port formation member is comprised of a material containing an epoxy resin, and the cover member is comprised of a material containing silicon or a metal.

A liquid ejection head comprising:

• a substrate configured to form a channel for a liquid to be ejected;
• an ejection port formation member configured to form an ejection port, the liquid having passed through the channel being ejected via the ejection port;
• a cover member configured to bond to the ejection port formation member at an opposite side to the substrate via an adhesive;
• and
• a thin film formed on a face of the cover member, the face being on a side where the cover member is bonded to the ejection port formation member, the thin film containing silicon carbide, or any of carbon-containing silicon oxide, silicon nitride, and silicon oxynitride,
• wherein the cover member has a thickness of 10 μm to 50 μm.