Patent ID: 7429099

Claim:
A liquid ejection head, comprising: a core substrate of which base material is fiber, the core substrate being provided with a plurality of ejection ports and a plurality of pressure chambers which communicate respectively with the plurality of ejection ports; a diaphragm which is attached to one surface of the core substrate and has a piezoelectric element disposed thereon; a first laminated resin layer portion which is formed by laminating resin thin plates onto the surface of the core substrate to which the diaphragm is attached, the first laminated resin layer portion being provided with a common liquid chamber that supplies a liquid to the plurality of pressure chambers; a second laminated resin layer portion which is formed by laminating resin thin plates onto a surface of the core substrate opposite to the surface to which the diaphragm is attached, the second laminated resin layer portion being provided with a plurality of ejection flow passages that connect the plurality of pressure chambers respectively to the plurality of ejection ports; and a plurality of drive wires which supply a drive signal to the piezoelectric element, at least a part of the plurality of drive wires being formed within the first laminated resin layer portion in a substantially perpendicular direction to the surface on which the piezoelectric element is disposed, thereby standing upright within the common liquid chamber.