Patent ID: 7867407

Claim:
An ink-jet recording head manufacturing method of manufacturing an ink-jet recording head comprising a pressure generating device for changing a pressure in a pressure chamber containing an ink; a plate-shaped member having a front surface and a back surface, the plate-shaped member having a partition wall formed on the front surface defining the pressure chamber, an ink supply passage and a common ink storage chamber, the plate-shaped member having a land formed on the back surface so as to correspond to the pressure chamber and be in contact with an extremity of the pressure generating device, the plate-shaped member having an elastic and deformable portion surrounding the land and being capable of being elastically deformed by a deformation of the pressure generating device; and a nozzle plate provided with a nozzle hole through which an ink droplet is ejected when the pressure in the pressure chambers is changed by the deformation of the pressure producing device, the nozzle plate being disposed on a side of the front surface of the plate-shaped member; the ink-jet recording head manufacturing method comprising: a first etching step for etching the plate-shaped member to form the partition wall on the front surface of the plate-shaped member; a second etching step for etching the plate-shaped member to form the land on the back surface of the plate-shaped member; and a nozzle plate attaching step for attaching the nozzle plate directly to or via another member to the front surface of the plate-shaped member; wherein: the plate-shaped member includes a first layer having the front surface, a second layer having the back surface and an intermediate layer sandwiched between the first and the second layers, the first etching step etches a desired portion of the first layer selectively over the intermediate layer so that the first layer is penetrated, the second etching step etches a desired portion of the second layer selectively over the intermediate layer so that the second layer is penetrated the plate-shaped member includes a first layer having the front surface, a second layer having the back surface, an intermediate layer sandwiched between the first and the second layers, a first adhesive layer bonding the first layer and the intermediate layer together and a second adhesive layer bonding the second layer and the intermediate layer together, the first etching step etches a desired portion of the first layer selectively over the first adhesive layer so that the first layer is penetrated, and the second etching step etches a desired portion of the second layer selectively over the second adhesive layer so that the second layer is penetrated.