Patent ID: 7246886

Claim:
An inkjet printhead comprising: a wafer substrate having an ink ejection side and an ink supply side; a plurality of nozzles formed in a nozzle plate supported on the ink ejection side; a chamber for holding ink in fluid communication with each of the nozzles respectively; a heater element suspended in each of the chambers respectively for immersion in the ink, the heater element configured as a beam extending in a plane parallel to that of the nozzle plate such that heating the heater element generates a vapour bubble that ejects a drop of ink from the nozzle; and, an ink supply path extending from the ink supply side of the wafer to each of the chambers respectively; wherein, the heater element is spaced less than 50 microns from the nozzle and the ink supply path is at least quadruple the spacing of the heater element from the nozzle.