Patent ID: 6158846
Filing Date: 2000-12-12
Classification: B41J

Abstract:
An inkjet pen comprising:a pen body having an internal reservoir region; anda monolithic printhead comprising a die, a thin film structure, and an orifice layer, the thin film structure formed at one side of the die, the orifice layer formed at a side of the thin film structure opposite the die;wherein respective nozzles are formed in the printhead, each nozzle including a nozzle chamber and a firing resistor, the orifice layer having openings, each opening aligned with a corresponding nozzle chamber, wherein the respective nozzles are formed in multiple rows, and wherein a refill slot is formed in the die for adjacent rows of the multiple rows, the refill slot formed in the die at a side opposite the thin film structure by first thinning the die at said opposite side, then forming one trench in the thinned portion for one of the adjacent rows and another trench in the thinned portion for another of the adjacent rows, and wherein respective feed channels are formed for each nozzle of the adjacent rows, each feed channel coupling a corresponding nozzle chamber to one of either said one trench or said another trench.