Patent ID: 6019458
Filing Date: 2000-02-01
Classification: B41J

Abstract:
An ink-jet printing head comprising:a pressurizing chamber substrate having a first side and a second side opposing each other;a plurality of pressurizing chambers formed on the first side of the pressurizing chamber substrate for pressuring ink out of a plurality of respective nozzles, each pressurizing chamber having a predetermined chamber width;a plurality of channels formed on the second side of the pressurizing chamber substrate opposite to the pressurizing chambers, respectively; anda plurality of piezoelectric thin-film elements having respective upper electrodes, a lower electrode and a piezoelectric film sandwiched between the upper electrodes and the lower electrode;wherein the piezoelectric film and the lower electrode continuously extend across the plurality of channels and extend into each of the channels; andwherein each of the upper electrodes has a narrower width than the predetermined chamber width.