Manufacture of a one piece full width ink jet printing bar

Abstract

A method of manufacturing a one piece full width ink jet printing bar starting with a glass or ceramic plate with conductive vias, metal interconnects and ink feeds preformed on the plate. Heater filaments are formed from a suitable metal such as tungsten, nickel or tantalum on the plate and insulated from the metal interconnects with silicon nitride. Jet chambers and transport chambers to transport the ink from the ink feeds to the jet chambers are formed using sacrificial material and a structural layer. After the structural layer has been patterned the sacrificial material is removed forming the jet chambers and the transport chambers. Bonding bumps are then formed on the reverse side of the ceramic or glass plate from the jet chambers to provide connections to electronic components which determine which ink jet chambers should fire.

Dependencies are inferred from the claim text.