Electrohydrodynamic Inkjet – Micro Pattern Fabrication for Printed Electronics Applications

Choi, Kyoung-Ho; Rahman, Khalid; Nauman, Malik Muhammad; Khan, Arshad; Kwon, Ki-Rin; Doh, Yang Hoi; Kim, Hyung-Chan

doi:10.5772/24672

Cited by 11 publications

(8 citation statements)

References 23 publications

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“…Heating process helps those particles to remove cover and form a continuous dense metal structures. EHD inkjet printing is able to print conductive lines for metallization in printed circuit boards and backplanes of printable transistors[ 27 ]. Since noble nanoparticles, such as gold and silver, have good electrical conductivity and non-oxidizing properties, their colloidal solution is firstly applied in the application of electronics.…”

Section: Applications Of Ehd Inkjet Printingmentioning

confidence: 99%

Designs and applications of electrohydrodynamic 3D printing

Gao¹,

Zhou²

2018

IJB

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This paper mainly reviews the designs of electrohydrodynamic (EHD) inkjet printing machine and related applications. The review introduces the features of EHD printing and its possible research directions. Significant progress has been identified in research and development of EHD high-resolution printing as a direct additive manufacturing method, and more effort will be driven to this direction soon. An introduction is given about current trend of additive manufacturing and advantages of EHD inkjet printing. Designs of EHD printing platform and applications of different technologies are discussed. Currently, EHD jet printing is in its infancy stage with several inherent problems to be overcome, such as low yielding rate and limitation of stand-off height. Some potential modifications are proposed to improve printing performance. EHD high-resolution printing has already been applied to precision components for electronics and biotechnology applications. This paper gives a review about the latest research regarding EHD used for high-resolution inkjet printing. A starting base is given to help researchers and students to get a quick overview on the recent development of EHD printing technology.

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Section: Applications Of Ehd Inkjet Printingmentioning

confidence: 99%

Designs and applications of electrohydrodynamic 3D printing

Gao¹,

Zhou²

2018

IJB

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“…Summary of the optimal settings and the efficiency of the system by means of the miniaturization capabilities are given in table 10. Moreover, it is believed that much smaller and uniform features can be achieved by utilizing a smaller nozzle ID to reduce the size of the Taylor cone [3,15], increasing the pulse voltage frequency [19], reducing the ink flow rate [14], switching the jetting modes [10,28] or by manipulating other processing parameters [7].…”

Section: Estimation Of Expected Results From S/n Ratio To Its Originamentioning

confidence: 99%

“…They also showed that for a specific setting and with a fixed flow rate, different modes of EHD jetting are a function of applied voltage. Choi et al [14] discussed the effects of different jetting parameters in the formation of various jetting modes. Kim et al [15] found the relationship between droplet diameter and pulsed voltage frequency.…”

Section: Introductionmentioning

confidence: 99%

Experimentation modelling and optimization of electrohydrodynamic inkjet microfabrication approach: a Taguchi regression analysis

et al. 2019

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Electrohydrodynamic (EHD) inkjet is a modern non-contact printing approach, which uses a direct writing technology of functional materials to achieve micro/nanoscale of printing resolution. As an alternative to conventional inkjet technology, the goal of the EHD inkjet printing is to generate uniformly minimized droplets on a substrate. In this study, the effects of applied voltage, standoff height and ink flow rate on droplet diameter formation in EHD inkjet printing process were analysed using Taguchi methodology and regression analysis. Several experiments were carried out using an L 27 (3 13) orthogonal array. Based on signal to noise (S/N) ratio and mean response, optimal droplet diameter was achieved. The analysis of variance (ANOVA) was used to find the significance and percentage of contribution of each input parameter along with their interaction on the output droplet diameter. Analysis of the results revealed that the ink flow rate was the dominant factor that affected the droplet diameter mostly. The effect of the applied voltage is significant until regular ejection starts. It helps reduce droplet diameter more than five times compared with its initial droplet diameter in the absence of the electric field. A confirmation test was carried out with a 90% confidence level to illustrate the effectiveness of the Taguchi optimization method. Both linear and quadratic regression analysis were applied to predict the output droplet diameter. The predicted result from the model and actual test results are very close to each other, justifying the significance of the models. Keywords. Electrohydrodynamic (EHD) inkjet printing; design of experiments (DOE); Taguchi method; analysis of variance (ANOVA).

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“…However, lithography is inherently not suitable for structures that have more than two dimensions [11] [12]. In this paper, we adapted a maskless process, Electro-Hydro-Dynamic inkjet printing, for sensor fabrication.…”

Section: High Voltagementioning

confidence: 99%

Piezoresistive pressure sensor array for robotic skin

Mirza¹,

Sahasrabuddhe²,

Baptist³

et al. 2016

Sensors for Next-Generation Robotics III

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Robots are starting to transition from the confines of the manufacturing floor to homes, schools, hospitals, and highly dynamic environments. As, a result, it is impossible to foresee all the probable operational situations of robots, and preprogram the robot behavior in those situations. Among human-robot interaction technologies, tactile sensing is an intuitive physical interaction method that can help define operational behaviors for robots cooperating with humans. Multimodal robotic skin with distributed sensors can help robots to increase their perception capabilities according to the surrounding environments.Electro-Hydro-Dynamic (EHD) printing is a flexible multi-modal sensor fabrication method because of its direct printing capability of a wide range of materials onto substrates with non-uniform topographies. In past work we designed interdigitated comb electrodes as a sensing element and printed piezoresistive strain sensors using customized EHD printable PEDOT:PSS based inks. We formulated a PEDOT:PSS derivative ink, by mixing PEDOT:PSS and DMSO. Bending induced characterization tests of prototyped sensors showed high sensitivity and sufficient stability.In this paper, we describe SkinCells, robot skin sensor arrays integrated with electronic modules. 4x4 EHD-printed arrays of strain sensors was packaged onto Kapton sheets and silicone encapsulant and interconnected to a custom electronic module that consists of a microcontroller, Wheatstone bridge with adjustable digital potentiometer, multiplexer, and serial communication unit. Thus, SkinCell's electronics can be used for signal acquisition, conditioning, and networking between sensor modules. Several SkinCells were loaded with controlled pressure, temperature and humidity testing apparatuses, and testing results are reported in this paper.

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Electrohydrodynamic Inkjet – Micro Pattern Fabrication for Printed Electronics Applications

Cited by 11 publications

References 23 publications

Designs and applications of electrohydrodynamic 3D printing

Designs and applications of electrohydrodynamic 3D printing

Experimentation modelling and optimization of electrohydrodynamic inkjet microfabrication approach: a Taguchi regression analysis

Piezoresistive pressure sensor array for robotic skin

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