Patent ID: 8622521
Filing Date: 2014-01-07
Classification: B41J

Abstract:
1. An inkjet printhead comprising: a plurality of nozzles; a bubble forming chamber corresponding to each of the nozzles respectively, the bubble forming chambers being configured to contain ejectable liquid; and a heater element disposed in each of the bubble forming chambers respectively for direct contact with the ejectable liquid, the heater element being configured for heating some of the ejectable liquid above its boiling point to form a gas bubble that causes the ejection of a drop of the ejectable liquid from the respective bubble forming chamber through the corresponding nozzle, wherein: the heater element is generally planar and suspended in the respective bubble forming chamber such that opposite sides of the heater element contact the ejectable liquid; the heater element is comprised of titanium aluminium nitride, and the titanium aluminium nitride is directly exposed to the ejectable liquid.