Operating Voltage Effects on Bubble Growth Dynamics of Thermal Inkjet Printheads

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The ejection performance and printing quality of a thermal inkjet printhead are significantly affected by bubble growth dynamics. This study investigated bubble growth dynamics and the ink ejection process under various heating conditions that are controlled by driving voltages. Numerical predictions are presented for bubble generating time, volume, temperature and pressure. The numerical computations suggest that a three-step voltage control method results in a larger ink-ejection velocity than a onestep voltage control method, even though the former generates less thermal energy. Through simulation, it can be shown that the three-step voltage control method actually has a larger heat flux rate from the printhead heater to the ink chamber when the ink is nucleated. Therefore a larger bubble pressure and a faster ink ejection are generated. This prediction is verified by the experimental results.

Document Type: Research Article

Publication date: January 1, 2002

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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