Patent ID: 7076873

Claim:
A method of manufacturing an ink-jet head including an actuator plate driven by a drive voltage generated in a driving circuit and a cavity plate, the method comprising the steps of: forming a clad plate of the cavity plate by unitarily bonding first and second layers made of different materials; after the first and second layers are bonded, treating one of the first and second layers of the clad plate by etching using a first etching agent that is able to etch one of the first and second layers and substantially unable to etch the other to form either pressure chambers in the first layer or first holes in the second layer; treating the other of the first and second layers of the clad plate to form the rest of the pressure chambers and the first holes such that each of the first holes communicates with an associated one of the pressure chambers; and laminating the first layer of the clad plate to the actuator plate.