Recording head and process for producing the same

摘要

The recording head of an ink-jet printer includes a main body having ink ejection devices and a device for driving the ink ejection devices independently and an orifice plate attached to the main body having ink ejection orifices opened in positions corresponding to the ink ejection devices. At least one side of the orifice plate is made of fluoroplastic, a surface of one side of the orifice plate made of the fluoroplastic has been treated to become more water-repellent than a bulk material of the fluoroplastic itself and a surface of the other side of the orifice plate attached to the main body is more hydrophilic than the bulk material. The surface of one side of the orifice plate made of the fluoroplastic and treated to become more water-repellent contains more fluorine atoms than are inherently present in the fluoroplastic in an untreated state.