Patent ID: 8388115

Claim:
A piezoelectric inkjet head structure, comprising: an upper cover plate; a lower cover plate; a piezoelectric actuating module comprising: an upper piezoelectric chip; a first electrode formed on a surface of said upper piezoelectric chip; a lower piezoelectric chip; a second electrode formed on a surface of said lower piezoelectric chip; a conductive layer formed between said first electrode and said second electrode, wherein said upper piezoelectric chip and said lower piezoelectric chip are connected with each other through said conductive layer; and a plurality of flow channels formed in said upper piezoelectric chip and said lower piezoelectric chip, wherein the entrances of said flow channels of said upper piezoelectric chip are separated from each other by the same spacing interval and are extended from the upper piezoelectric chip to the lower piezoelectric chip, the entrances of said flow channels of said lower piezoelectric chip are separated from each other by the same spacing interval and are extended from the lower piezoelectric chip to the upper piezoelectric chip, and the entrances of said flow channels of said upper piezoelectric chip and the entrances of said flow channels of said lower piezoelectric chip are arranged in a staggered form; a nozzle plate comprises a plurality of nozzles, which are located at first ends of said flow channels; and a seal layer located at second ends of said flow channels, wherein said upper cover plate and said lower cover plate are respectively located at a top side and a bottom side of said piezoelectric actuating module, wherein during operation of said piezoelectric actuating module, ink liquid is introduced into said flow channels of said piezoelectric actuating module from said upper cover plate and said lower cover plate, and then ejected out of said nozzles.