An inkjet printhead with nozzles 4 and liquid passages 31, 32 leading to each nozzle. The nozzles, ejection actuators 14, associated drive circuitry 22 and liquid passage 31, 32 being formed on and through a wafer 21 using lithographically masked etching technique, such that the wafer has a droplet ejection...http://www.google.de/patents/US7575298?utm_source=gb-gplus-sharePatent US7575298 - Inkjet printhead with ink supply passage to nozzle etched from opposing sides of wafer
