Patent ID: 8813363
Filing Date: 2014-08-26
Classification: B41J,Y10T

Abstract:
1. A method of manufacturing a piezoelectric inkjet printhead, comprising: processing a lower silicon-on-insulator substrate having a sequentially stacked structure, the sequentially stacked structure with a first silicon layer, an intervening oxide layer, and a second silicon layer, processing the lower silicon-on-insulator substrate, by etching the second silicon layer to form a manifold, a plurality of pressure chambers arranged along at least one side of the manifold and connected with the manifold, and a plurality of dampers connected with the pressure chambers, and by etching the first silicon layer and the intervening oxide layer to form a plurality of vertical nozzles through the first silicon layer and the intervening oxide layer to corresponding ones of the plurality of dampers; stacking and bonding an upper substrate on the lower substrate; reducing the upper substrate to a predetermined thickness; and forming a piezoelectric actuator on the upper substrate, the piezoelectric actuator functions during operation to apply a driving force to the respective pressure chambers to eject ink, wherein the dampers are formed to have a depth substantially equal to a thickness of the second silicon layer by etching the second silicon layer using the intervening oxide layer as an etch stop layer, and the nozzles are formed to have a length substantially equal to a total thickness of the first silicon layer and the intervening oxide layer or substantially equal to a thickness of the first silicon layer.