| 摘要 |
A manufacturing method for an ink jet recording head including an energy generating element for generating energy for ejecting ink, wiring and 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, the manufacturing method includes a step of preparing a substrate on which the energy generating element, the wiring and the electrode pad have been formed; a step of forming a protection layer covering edges of and around generating element and the electrode pad; a step of forming, with patterning, an adhesion layer for adhering the flow path formation member to a surface of the substrate through the protection layer, on a portion of the protection layer where the flow path formation member is formed and a portion surrounding the electrode pad; a step forming through an electroless plating, a nickel layer covering the electrode pad and a gold layer covering the nickel layer to provide a bump.
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