Patent ID: 6857186

Claim:
A method of fabricating a piezoelectric ink-jet print head, comprising the steps of: providing a substrate; forming a metallic layer over the substrate; forming a lower electrode layer over the metallic layer; forming a patterned piezoelectric layer over the lower electrode layer; forming a patterned upper electrode layer over the piezoelectric layer; forming a patterned thick film layer over the metallic layer, wherein the thick film layer has at least a slot hole that passes through the thick film layer and forms a cavity with the metallic layer, and the cavity encloses the upper electrode layer and the piezoelectric layer; and attaching a nozzle plate to the thick film layer, wherein the nozzle plate, the thick film layer and the metallic layer together form an ink cavity, and the nozzle plate has at least a nozzle continuous with the ink cavity.