• Journal of Mechanical Science and Technology
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• v.18 no.5
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• pp.798-807
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• 2004

A testing system was developed to improve the reliability of printhead and several printheads were tested. We developed a thermally driven monolithic inkjet printhead comprising dome-shaped ink chambers, thin film nozzle guides, and omega-shaped heaters integrated on the top surface of each chamber. To perform a fatigue test of an inkjet printhead, the testing system automatically detects a heating failure using a Wheatstone bridge circuit. Various models were designed and tested to develop a more reliable printhead. Two design parameters of the width of reinforcing layer and heater were investigated in the test. Specially., the reinforcing layer was introduced to improve the fatigue life of printhead. The life-span of heater with a reinforcing layer was longer than that without a reinforcing layer. The wider the heater was, the longer the life of printhead was.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2004.10a
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• pp.173-177
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• 2004

This paper presents a novel mechanism of electrostatic micro thruster using based on a layered electrode structure of nozzle. A comparison between experiment and simulation studies indicates that the proposed mechanism allows at less than 100 volt of operating voltage for the micro thruster.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2005.11a
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• pp.278-281
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• 2005

This paper present a study of size effect on electrostatic colloid micro thruster. According to results about size effect experiments indicates that the proposed mechanism allows at less than 500 volt of operating voltage for the micro thruster.