Liquid ejection head, method for manufacturing liquid ejection head, and method for manufacturing structure

A method for manufacturing a liquid ejection head including a substrate and a member which is disposed above the substrate and which has passage communicatively connected to discharge port through which a liquid is ejected, the method comprising:

• providing first solid layers above the substrate such that outer side surfaces of the first solid layers form an obtuse angle with the substrate;
• providing a second solid layer, used to form a mold for the passage, above the substrate such that the second solid layer abuts the outer side surfaces of the first solid layers;
• forming the mold for the passages from the second solid layer;
• removing the first solid layers;
• providing a cover layer over the mold;
• and
• forming the passage by removing the mold.

A method for forming a structure, comprising:

• providing first solid layers above a substrate such that outer side surfaces of the first solid layers form an obtuse angle with the substrate;
• providing a second solid layer made of a positive photosensitive resin above the substrate such that the second solid layer abuts the outer side surfaces of the first solid layers;
• and
• removing the first solid layers for forming the structure.

A method for forming a structure, comprising:

• providing first solid layers made of a positive photosensitive resin above a substrate such that outer side surfaces of the first solid layers form an obtuse angle with the substrate;
• providing a second solid layer above the substrate such that the second solid layer abuts the outer side surfaces of the first solid layers;
• exposing portions of the outer side surfaces of the first solid layers through the second solid layer;
• and
• removing the exposed portions from the first solid layers.