Inkjet head and method for producing the same

A method for producing an inkjet head, the inkjet head including a wiring circuit board having an opening for supplying ink, an element for allowing the ink to be discharged, a wiring circuit for driving the element, a first terminal section for inputting a drive signal for driving the element to the wiring circuit, the method comprising the steps of:

• contacting a flexible wiring circuit board with a process liquid to form a process liquid coating on the flexible wiring circuit board, the flexible wiring circuit board including a second terminal section having a wiring member containing copper, the process liquid containing at least one of 1, 2, 3 triazole and 1, 2, 4 triazole;
• washing away the process liquid coating with a solvent to remove the process liquid coating except for the process liquid coating on a surface of the wiring member so as to form a copper ion diffusion inhibiting film on the surface of the wiring member;
• bonding and electrically connecting the second terminal section formed with the copper ion diffusion inhibiting film to the first terminal section;
• and
• filling resin to cover a bonded portion of the first and second terminal sections from outside of the bonded portion.