Patent ID: 6582064
Filing Date: 2003-06-24
Classification: B41J

Abstract:
A fluid ejection device comprising:a substrate having a first surface and a second surface, the substrate defining a fluid supply conduit; a stack of thin film layers having a first surface and a second surface, the first surface of the stack of thin film layers being affixed to the second surface of the substrate, the stack of thin film layers including at least one fluid energizing element, and the stack of thin film layers defining a plurality of fluid filter openings in fluid communication with the fluid supply conduit of the substrate, each fluid filter opening of the plurality of fluid filter openings extending only through the stack of thin film layers from the first surface to the second surface thereof, the plurality of fluid filter openings functioning as a fluid filter; and a further substrate having a first surface affixed to the second surface of the stack of thin film layers, and an exterior second surface, the further substrate defining at least one firing chamber positioned over the at least one fluid energizing element of the stack of thin film layers, with the at least one firing chamber opening through at least one nozzle aperture in the exterior second surface of the further substrate.