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Micromachines 2017, 8(12), 346;

Investigation of CMOS Multiplexer Jet Matrix Addressing and Micro-Droplets within a Printhead Chip

School of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan
Author to whom correspondence should be addressed.
Received: 14 August 2017 / Revised: 19 November 2017 / Accepted: 22 November 2017 / Published: 29 November 2017
(This article belongs to the Special Issue Selected Papers from IEEE ICASI 2017)
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In this study, we demonstrate and investigate a new droplet injection design. We create a thermal inkjet (TIJ) printhead using an application-specific integrated circuit system and bulk micromachining technology (microelectromechanical systems). We design inkjet printhead chips with a new structure and investigate their properties. For the new structure, the integration of complementary metal-oxide-semiconductors (MOSs) and enhancement-mode devices, as well as power switches and a TIJ heater transducer, enables logic functions to be executed on-chip. This capability is used in the proposed design to address individual jets with even fewer input lines than in matrix addressing. A high number of jets (at least 896) can be addressed with only 11 input lines. E1 (Enable 1) and E2 (Enable 2) are set up dependently, and they have the ability to reverse their signals in relation to each other (i.e., if E1 is disabled, E2 is enabled and vice versa). The E1 and E2 signals each service 448 jets. If one of the MOSs is turned on, then it corresponds to a power line with a similar function. If an addressing gate terminal of the other MOS has a discharge action, then we can control a different heater to generate heating bubbles in the jet inks. The operating frequency for addressing these measurements is 18 kHz in normal mode, 26 kHz in draft mode, and 16 kHz in best mode. View Full-Text
Keywords: complementary metal-oxide-semiconductor (CMOS) multiplexer; jets matrix; micro-droplet; printhead chip complementary metal-oxide-semiconductor (CMOS) multiplexer; jets matrix; micro-droplet; printhead chip

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Liou, J.-C.; Yang, C.-F. Investigation of CMOS Multiplexer Jet Matrix Addressing and Micro-Droplets within a Printhead Chip. Micromachines 2017, 8, 346.

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