Patent ID: 7789493

Claim:
A method for manufacturing a plurality of piezoelectric ink-jet printheads, comprising: forming a monocrystalline silicon upper substrate having extended therethrough ink supply holes, through which ink is to be supplied and which correspond to the plurality of printheads, the upper substrate also having pressure chambers, which are to be filled with ink to be ejected, which have first and second ends, and which respectively correspond to the ink supply holes, wherein the pressure chambers are positioned at a bottom surface of the upper substrate; forming a monocrystalline silicon intermediate substrate having ink reservoirs, which correspond to the plurality of printheads, which are respectively connected to the ink supply holes, and in which supplied ink is to be stored, the intermediate substrate also having dampers in positions that respectively correspond to the first ends of the pressure chambers, wherein the ink reservoirs are positioned at a top surface of the intermediate substrate; forming a monocrystalline silicon lower substrate having a plurality of nozzles corresponding to the plurality of printheads and through which ink is to be ejected, wherein the nozzles are positioned to respectively correspond to the dampers; stacking and adhering the lower substrate and the intermediate substrate on one another, stacking and adhering the intermediate substrate and the upper substrate on one another; forming piezoelectric actuators, which respectively provide a driving force for ejecting ink from the pressure chambers, on the upper substrate, and dicing the three adhered substrates to respectively form the plurality of printheads, wherein: each of the printheads includes a restrictor that connects the second end of the respective pressure chambers to a corresponding ink reservoir, the restrictor being on at least one of the bottom surface of the upper substrate and the top surface of the intermediate substrate.