US Patent 7481942 Monolithic ink-jet printhead and method of manufacturing the same

An ink-jet printhead and a method of manufacturing the same include a substrate on which a heater and a passivation layer protecting the heater are formed, a passage plate on which an ink chamber corresponding to the heater and an ink passage connected to the ink chamber are formed, and a nozzle plate in which an orifice corresponding to the ink chamber is formed. An exposure stop layer (ESL) that blocks passage of a photosensitive energy is formed inside the nozzle plate, and the nozzle plate and the passage plate are bonded with each other by the exposure stop layer (ESL).