Patent ID: 7703895
Filing Date: 2010-04-27
Classification: B41J

Abstract:
1. A piezoelectric inkjet printhead comprising: an upper substrate, including: a lower substrate disposed directly adjacent the upper substrate, the lower substrate including: a plurality of piezoelectric actuators, the piezoelectric actuators formed on the upper substrate and corresponding to the pressure chambers, wherein: each of the upper substrate and the lower substrate is a silicon substrate, and the upper substrate is stacked on the lower substrate, the upper substrate includes a first silicon layer and a second silicon layer stacked on each other, the manifold and the plurality of pressure chambers are formed in the first silicon layer, the second silicon layer serves as a vibration plate to be deformed by the piezoelectric actuator, a depth of each of the pressure chambers is substantially the same as a thickness of the first silicon layer, and a depth of the manifold is less than that of each of the pressure chambers.