Microelectromechanical fluid ejection device

Details Microelectromechanical fluid ejection device Microelectromechanical fluid ejection device

2005-08-30

2005-08-30

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S056000

Reexamination Certificate

active

06935725

ABSTRACT:
In order to provide a very high printing resolution a microelectromechanical fluid ejection device is provided. The device includes a plurality of thermal fluid ejection assemblies formed upon a common wafer substrate by means of integrated circuit fabrication processes. Each of the assemblies includes a nozzle chamber covered by a roof into which an ink ejection port is formed. An electrically activated thermal actuator mechanism is formed on the wafer having a free end that extends into the nozzle chamber in order to cause ejection of ink contained in the chamber through the port during use. Heat sinks are provided on the thermal actuator mechanism to avoid performance failure due to overheating.

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patent: WO 99/03681 (1999-01-01), None

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