Pipe joint, its manufacturing method, and fluid device using the same

摘要

A pipe joint is made by filling resin in at least an inside of a hole passed through the substrate and opened at the substrate's surface. A resin die is formed projected out of the surface of the substrate. A layer-form member is formed integrally at the surface of the substrate and side surface of the resin die. The resin forming the resin die is removed so as to integrally form the hollow projection communicating with the hole at the surface of the substrate.