Patent ID: 9050798
Filing Date: 2015-06-09
Classification: B41J,H01L,Y10T

Abstract:
1. An ink-jet head comprising: an oscillating plate having a nozzle configured to discharge ink; an ink pressure chamber in fluid communication with the nozzle and disposed on a first surface of the oscillating plate; a first electrode disposed on a second surface of the oscillating plate, the first electrode having a predetermined footprint; a piezoelectric film disposed on the first electrode at a position that does not overlap the nozzle and configured to expand or contract the ink pressure chamber by deforming the oscillating plate in response to a driving signal, the piezoelectric film having a footprint that is geometrically similar to the predetermined footprint; a second electrode that is formed on the piezoelectric film, the second electrode having a footprint that is geometrically similar to the predetermined footprint, wherein the first electrode and the second electrode are configured to provide the driving signal to the piezoelectric film; an ink supply path configured to supply ink to the ink pressure chamber; a protective film disposed on the second electrode; and an ink-repellent film disposed on the protective film.