Patent ID: 6609785
Filing Date: 2003-08-26
Classification: B41J,Y10T

Abstract:
An ink jet recording head comprising:a substrate including at least a head base and a nozzle plate; an ink chamber formed in said head base; a nozzle formed in said nozzle plate, said nozzle communicating with said ink chamber; a diaphragm provided on said head base for pressurizing ink in said ink chamber, said diaphragm including a common electrode; a piezoelectric thin film provided on said diaphragm; and a separate electrode provided on said piezoelectric thin film for applying an electric field to said piezoelectric thin film, wherein said piezoelectric thin film and said separate electrode are patterned to the same shape such that (1) said piezoelectric thin film is patterned to be a discrete piezoelectric thin film, (2) a pattern shift between said discrete piezoelectric thin film and said separate electrode is eliminated, (3) said discrete piezoelectric thin film does not extend in a lateral direction beyond lateral side surfaces of said separate electrode, and (4) said common electrode extends in the lateral direction beyond lateral side surfaces of said discrete piezoelectric thin film.