Patent ID: 7789499

Claim:
An ink jet print head comprising: liquid ejection substrates each having back surface electrodes on a surface thereof opposite a surface formed with ink ejection openings; and a support substrate having electrode terminals and supporting the liquid ejection substrates, wherein the back surface electrodes of the liquid ejection substrates and the electrode terminals of the support substrate are electrically connected together through a plurality of conductive layers, wherein surfaces of the conductive layers which contact the liquid ejection substrates are provided substantially parallel to a reference plane of the support substrate, wherein the reference plane of the support substrate is defined by a plurality of reference points provided in the support substrate, wherein alignment marks of a surface wire layer are formed on a surface of the support substrate which has the electrode terminals, wherein a position at which to apply a conductive material to form the conductive layers is aligned by taking the alignment marks as a reference, and wherein the liquid ejection substrates are mounted on the conductive layers by aligning positions of the liquid ejection substrates with the alignment marks as a reference.