Liquid ejection head and method for manufacturing liquid ejection head

A method for manufacturing a liquid ejection head, the liquid ejection head comprising:

• a substrate having, above one side thereof, an energy generating element configured to generate an energy used to eject liquid;
• an ejection port from which a liquid is ejected, the ejection port being located at a position corresponding to the energy generating element;
• a liquid channel which is in communication with the ejection port, the liquid channel penetrating the substrate from the one side to another side of the substrate;
• and
• a supply port in communication with the liquid channel,
• the method comprising the steps of:
• forming the energy generating element and forming a projecting layer above the one side such that the layer is formed of a same material as that of the energy generating element extending inward of an inner peripheral portion of an opening in the supply port in the one side;
• and
• forming the supply port in the substrate.