Patent ID: 8267503

Claim:
A manufacturing method for an ink jet recording head including an energy generating element for generating energy for ejecting ink and an electrode pad for supplying electric power to the energy generating element, and a flow path formation member in which an ink flow path is formed in fluid communication with an ink ejection outlet, said manufacturing method comprising: a step of providing a substrate on which the energy generating element and the electrode pad have been formed; a step of forming a protection layer covering the energy generating element and edges of the electrode pad; a step of forming, with patterning, an adhesion layer for adhering the flow path formation member to the protection layer on the substrate, the adhesion layer being formed on a portion of the protection layer where the flow path formation member is to be formed and a portion surrounding the electrode pad; and a step of forming through electroless plating, a nickel layer covering the electrode pad and a gold layer covering the nickel layer to provide a bump.