Patent ID: 7905580
Filing Date: 2011-03-15
Classification: B41J,Y10T

Abstract:
1. A fluid ejector comprising: a silicon wafer having a first side and a second side; a multi-layer monolithic structure formed on the first side of the silicon wafer, the multi-layer monolithic structure including, a first structure layer formed in immediate contact with the first side of the silicon wafer having an aperture located within the open area of the silicon wafer, a second structure layer having a horizontal portion and closed, filled trenches or vertical sidewalls, at least a portion of the horizontal portion in contact with a filler layer located between the horizontal portion and the first structure layer, wherein the first structure layer, the horizontal portion and the closed filled trenches or vertical sidewalls of the second structure layer defining a fluid cavity; a thin film piezoelectric is associated with the horizontal portion of the second structure layer to form an actuator, and the second side of the silicon wafer having an etched portion forming an open area which exposes the aperture in the first structure layer.