A fluid ejection assembly includes a first layer, and a second layer positioned on a side of the first layer. The second layer has a side adjacent the side of the first layer and includes barriers defining a fluid chamber on the side, a drop ejecting element formed within the fluid chamber, and a thermal...http://www.google.fr/patents/US7380914?utm_source=gb-gplus-shareBrevet US7380914 - Fluid ejection assembly