Patent ID: 6309055
Filing Date: 2001-10-30
Classification: B41J

Abstract:
An ink jet printing head comprising:a pressure generating chamber;nozzle openings formed in said pressure generating chamber;a piezoelectric actuator comprising:an elastic plate formed adjacent to at least a portion of said pressure generating chamber;a piezoelectric activating portion comprising a lower electrode film, a piezoelectric layer and an upper electrode film formed in a region opposite to said pressure generating chamber;a conductive pattern connected to said upper electrode film, wherein a contact portion formed opposite to said pressure generating chamber connecting to said conductive pattern for applying voltage to the upper electrode of said piezoelectric activating portion is formed on the upper surface of said upper electrode; andvibration-regulating means for partially regulating vibration of said piezoelectric actuator formed in a region where said contact portion is formed;whereby deformation of a portion of said elastic plate, which is opposite to said pressure generating chamber, corresponding to said contact portion is reduced when voltage is applied to said piezoelectric actuator.