Inkjet nozzle for an inkjet printer

An inkjet nozzle for an inkjet printer comprising

• a housing (1) made of an essentially undeformable material and defining an inlet end (3) and an opposite outlet end (4),
• an ink supply channel (2) extending through said housing and between said inlet and said outlet end, said ink supply channel including a first cylindrical portion of relatively large diameter adjacent said inlet end and a second cylindrical portion of relatively small diameter adjacent said outlet end, the diameter of said second cylindrical portion of said ink supply channel being between about 0.2 to 1 mm,
• a separate thin flat plate (7) fixed to said outlet end of said housing so as to close said second cylindrical portion of said ink supply channel, said plate including an outflow channel (8) therethrough which is coaxially aligned with said second cylindrical portion of said ink supply channel and which has a diameter between about 3 and 30 microns and a length which is about 3 to 30 times greater than said diameter, and
• an ultrasonic vibration element mounted to said housing at a location adjacent said outlet end.