On the meniscus deformation when the pulsed voltage is applied

Li, J.L.

doi:10.1016/j.elstat.2005.04.005

Cited by 45 publications

(41 citation statements)

References 16 publications

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“…The continuous cone-jet only form continuous lines and not a series of dots. The pulsating jet mode has been reported to produce discontinuous lines or a series of dots in a DOD fashion by use of the pulsed voltage [91] or lower DC voltage than that for the continuous cone-jet mode. However, as pulsed voltage frequency increases, drops may not generate at every pulse although the meniscus oscillates or it may break up into many droplets [87].…”

Section: Electrohydrodynamic Printing Techniquesmentioning

confidence: 97%

Inkjet printing for flexible electronics: Materials, processes and equipments

et al. 2010

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Inkjet printing, known as digital writing technique, can directly deposit functional materials to form pattern onto substrate. This paper provides an overview of inkjet printing technologies for flexible electronics. Firstly, we highlight materials challenges in implementing flexible devices into practical application, especially for inkjet printing process. Then the micro/nano-patterning technologies of inkjet printing are discussed, including conventional inkjet printing techniques and electrohydrodynamic printing techniques. Thirdly, the related equipments on inkjet printing are shown. Finally, challenges for its future development are also discussed. The main purpose of the work is to condense the basic knowledge and highlight the challenges associated with the burgeoning and exciting field of inkjet printing for flexible electronics.flexible electronics, nanomanufacturing, organic thin film transistor, micro/nano-patterning, inkjet printing, electrohydynamics, roll-to-roll Citation: Overview of flexible electronics technologyFlexible electronics, also known as printable/organic electronics, represent a technology for building electronic circuits by depositing electronic devices onto flexible substrates. Realization of flexible electronics with performance equal to conventional microelectronics built on brittle semiconductor wafers, but in high mobilities, optical transparency, light-weight, stretchable/bendable formats and easy to print rapidly over large areas would enable many new applications [1-4] not satisfied by a traditional rigid electronics. The applications vary from medicine and biology to energy technology and space science [1,2], such as flexible display [4,5], thin film solar cell [6,7], large area sensors and actuators [8,9], shown in Figure 1. These applications are based on thin film transistors (TFTs) which have strong materials and processes contents. Flexible electronics *Corresponding authors (have open boundaries that move with its development and applications and is a highly interdisciplinary field. As a result, there are considerable opportunities for innovation and basic scientific research into new types of electronic materials, processes and equipments.The flexibility, a critical issue in flexible electronics, is one of the most important differences from traditional microelectronics. Polymer organics and inorganic materials are the two kind of materials adopted in flexible electronics. The polymer organics are generally believed to be well suited for these applications and naturally compatible with polymeric substrates. However, the electrical properties is not ideal when devices are fabricated with polymer organics. This leads to interest in the possibility of inorganic based flexible electronics [10]. It is a challenge to design a bendable and stretchable electronics based on inorganic materials due to their small fracture strain. The most basic realization is thin films of the inorganics are adopted as semiconductors, conductors and/or insulators on substrates to mini-

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Section: Electrohydrodynamic Printing Techniquesmentioning

confidence: 97%

Inkjet printing for flexible electronics: Materials, processes and equipments

et al. 2010

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“…The pulsating jet mode has been reported to produce discontinuous lines or a series of dots in a drop-on-demand fashion. Pulsating jet mode occurs when the pulsed voltage is applied (Li, 2006;Yogi et al, 2001) or lower DC voltage than that for the continuous cone-jet mode is applied. However, as pulsed voltage frequency increases, drops may not generate at every pulse although the meniscus oscillates or it may break up into many droplets.…”

Section: Introductionmentioning

confidence: 99%

Electrohydrodynamic drop-on-demand patterning in pulsed cone-jet mode at various frequencies

Kim

2008

Journal of Aerosol Science

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“…The onset condition of E-jet printing is that the resultant force of electric field force and pressure on the meniscus overcomes the surface tension and viscosity force in the solution. 34,35 E max , E onset are used to represent the maximum electric field on the meniscus and the onset electric field that is needed for the onset of E-jet printing, respectively. When E max ≥ E onset , the E-jet printing will start.…”

Section: The Principle Of Multi-level Voltage Methodsmentioning

confidence: 99%

Addressable multi-nozzle electrohydrodynamic jet printing with high consistency by multi-level voltage method

et al. 2015

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It is critical and challenging to achieve the individual jetting ability and high consistency in multi-nozzle electrohydrodynamic jet printing (E-jet printing). We proposed multi-level voltage method (MVM) to implement the addressable E-jet printing using multiple parallel nozzles with high consistency. The fabricated multi-nozzle printhead for MVM consists of three parts: PMMA holder, stainless steel capillaries (27G, outer diameter 400 μm) and FR-4 extractor layer. The key of MVM is to control the maximum meniscus electric field on each nozzle. The individual jetting control can be implemented when the rings under the jetting nozzles are 0 kV and the other rings are 0.5 kV. The onset electric field for each nozzle is ∼3.4 kV/mm by numerical simulation. Furthermore, a series of printing experiments are performed to show the advantage of MVM in printing consistency than the “one-voltage method” and “improved E-jet method”, by combination with finite element analyses. The good dimension consistency (274μm, 276μm, 280μm) and position consistency of the droplet array on the hydrophobic Si substrate verified the enhancements. It shows that MVM is an effective technique to implement the addressable E-jet printing with multiple parallel nozzles in high consistency.

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On the meniscus deformation when the pulsed voltage is applied

Cited by 45 publications

References 16 publications

Inkjet printing for flexible electronics: Materials, processes and equipments

Inkjet printing for flexible electronics: Materials, processes and equipments

Electrohydrodynamic drop-on-demand patterning in pulsed cone-jet mode at various frequencies

Addressable multi-nozzle electrohydrodynamic jet printing with high consistency by multi-level voltage method

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