Process for producing liquid ejection head, and liquid ejection head

A process for producing a liquid ejection head equipped with:

• an element substrate unit configured to include an element substrate and a cover member, the element substrate including an energy generating element that generates energy for ejecting liquid, the cover member being configured to surround a periphery of the element substrate and have an opening that does not cover an ejection port for ejecting liquid formed in the element substrate;
• and
• a support part configured to support the element substrate unit,
• the process comprising the step of:
• applying, to the support part, a first adhesive material for fixing the cover member, and a second adhesive material and a third adhesive material for fixing the element substrate;
• activating the second adhesive material by irradiating the second adhesive material with light;
• placing the element substrate unit on the support part such that the second adhesive material is covered with the cover member;
• curing the first adhesive material;
• and
• curing the third adhesive material,
• wherein the activating of the second adhesive material is performed prior to the placing of the element substrate unit, and
• wherein the curing of the third adhesive material is performed after the curing of the first adhesive material.