Liquid discharging head, producing method thereof, structure, and producing method thereof

A producing method of a liquid discharging head including a discharge port discharging a liquid and a flow path communicating with the discharge port, the method comprising the steps of:

• forming a pattern of a shape of the flow path on a substrate;
• forming a layer of a negative type photosensitive resin composition including a photo-initiated polymerization initiator on the substrate so as to coat the pattern, at least a substrate-side region of the layer in a vicinity of the substrate including a sensitizing agent of the photo-initiated polymerization initiator, a density of the sensitizing agent in the layer being higher in the substrate-side region than in a surface-side region of the layer in a vicinity of a surface of the layer opposite to the substrate;
• forming the discharge port by exposing the layer to pattern the layer;
• and
• removing the pattern to form the flow path.