Patent ID: 6938993
Filing Date: 2005-09-06
Classification: B41J

Abstract:
1. A fluid injection head structure comprising: a substrate; a manifold formed in the substrate; at least two rows of chambers in flow communication with the manifold and positioned on two sides of the manifold, wherein fluid flows into the chambers through the manifold; a plurality of orifices in flow communication with a corresponding chambers; a plurality of bubble generators disposed on the substrate, only single bubble generator being disposed in one chamber, and each bubble generator being disposed approximately adjacent to a corresponding orifice and external to the corresponding chamber; a driving circuit comprising a plurality of functional devices disposed on the substrate for sending driving signals to drive the plurality of the bubble generators; and a conductive trace disposed on the substrate for driving the bubble generators, wherein a portion of the conductive trace is disposed above the manifold and between the two rows of chambers.