Liquid supply member, method of making liquid supply member, and method of making liquid discharge head

A method of making a liquid discharge head including a discharge port that discharges liquid and a supply path through which liquid is supplied to the discharge port, the method comprising:

• a preparation step of preparing a transparent member and an absorption member, the transparent member including a first surface in which a first opening portion is formed and being transparent to a laser beam, and the absorption member including a second surface in which a second opening portion is formed and being capable of absorbing laser beam;
• a contact step of making the transparent member and the absorption member contact each other at a contact portion in such a manner that the first opening portion and the second opening portion overlap each other with respect to an intersecting direction that intersects the first surface and the second surface that are disposed so as to face each other;
• and
• a welding step of forming a first supply path by welding the transparent member and the absorption member to each other by irradiating the contact portion with a laser beam through the transparent member, the first supply path including the first opening portion and the second opening portion and being a path through which the liquid flows in the intersecting direction,
• wherein, after the contact step and before the welding step, a space is formed between the contact portion and the first supply path and between the first surface and the second surface.