Method of manufacturing an ink-jet printhead

A method of manufacturing an ink jet printhead comprising:

• providing a silicon substrate including active ejecting elements;
• providing a hydraulic structure layer for defining hydraulic circuits through which ink flows;
• providing a silicon orifice plate having a plurality of nozzles for ejection of said ink;
• and
• assembling said silicon substrate with said hydraulic structure layer and said silicon orifice plate;
• wherein providing said silicon orifice plate comprises:
• providing a silicon wafer having a planar extension delimited by a first and a second surface opposite to each other;
• performing a thinning step at said second surface so as to remove from said second surface a central portion having a preset height, said silicon wafer being formed, following said thinning step, by a base portion having a planar extension and a peripheral portion extending, from said base portion transversally with respect to the planar extension of said base portion;
• and
• forming in said silicon wafer a plurality of through holes, each defining a respective nozzle for ejection of said ink.