Method of manufacturing microstructure and method of manufacturing liquid ejection head

A method of manufacturing a liquid ejection head including a nozzle layer that has an ejection orifice for ejecting liquid and a flow path that communicates with the ejection orifice, and an element substrate that has an energy generating element configured to generate energy for ejecting liquid from the ejection orifice and a liquid supply port which communicates with the flow path for supplying liquid, the method comprising steps of:

• transferring a laminate including a photosensitive resin composition onto the element substrate;
• and
• patterning the laminate,
• wherein the laminate includes a first layer that includes a first resin composition and a second layer that includes a second resin composition, each of the first resin composition and the second resin composition being a negative type photosensitive resin composition containing a cationically polymerizable compound having an epoxy group, and
• wherein the laminate is transferred such that the second layer faces the substrate and in the step of transferring the laminate, the first resin composition is in a solid state and the second resin composition is in a liquid state, and
• wherein at least a portion of the nozzle layer is manufactured by using the laminate.