Method for manufacturing liquid ejection head

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

• preparing a substrate including an energy-generating element disposed on a first surface of the substrate and a supply path for liquid;
• disposing a dry film on the first surface of the substrate in such a manner that the dry film partially enters the supply path, the dry film having a first surface that faces the first surface of the substrate and a second surface that is opposite to the first surface of the dry film;
• etching the dry film from the second surface of the dry film so that the dry film has an etched surface substantially in parallel with the first surface of the substrate and covers the supply path;
• forming a resin layer to be a flow path member on the dry film covering the supply path;
• and
• removing the dry film covering the supply path.