Drop-on-Demand Electrohydrodynamic Printing of High Resolution Conductive Micro Patterns for MEMS Repairing

Yang, Young Jin; Kim, Hyung Chan; Sajid, Memoon; Kim, Soo Wan; Aziz, Shahid; Choi, Young Soo; Choi, Kyung Hyun

doi:10.1007/s12541-018-0097-9

Cited by 29 publications

(19 citation statements)

References 26 publications

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“…Despite successes, these methods suffer from disadvantages that can result in high production costs including complex hardware, excessive use of printing materials, limitations in the area that can be patterned and slow printing rates. 62 Electrohydrodynamic (EHD) printing is a technique that can address such issues, providing a means to print high resolution patterns on scales ranging from tens of nanometres to hundreds of micrometres, and with a more efficient use of resources. In an EHD printer an electrified jet is obtained by applying a potential difference between the ink nozzle and the substrate.…”

Section: New Conceptsmentioning

confidence: 99%

“…EHD printing of electrodes is mainly performed using metal nanoparticle inks due to their inertness, high conductivity, and nonoxidizing properties. 62 Direct printing using EHD technology has been use to fabricate a wide variety of components for thin field transistors, 63,64 sensors, 65 photovoltaic cells, 66 optoelectronic devices 67,68 and micro-electromechanical systems. 69 The present work explores enhancement of the performance of a bio-photovoltaic cell through the incorporation of two types of plasmonic metal NP (Fig.…”

Section: New Conceptsmentioning

confidence: 99%

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Section: New Conceptsmentioning

confidence: 99%

Section: New Conceptsmentioning

confidence: 99%

Plasmonic protein electricity generator

et al. 2022

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“…As shown in Figure , IJP and AJP are two representative solvent-based noncontact direct ink writing technologies that have been adopted to produce electrical and electronic devices in a broad variety of applications. On the basis of the principles of droplet formation and ejection, IJP can be divided into continuous inkjet (CIJ) printing system and drop-on-demand (DoD) printing system. − For a CIJ printing system as shown in Figure a, a continuous ink flow is broken up into droplets uniformly by the controlled thermal or piezoelectric disturbance. As the generated droplets will pass through an electric field, some ink droplets will be charged and captured for reuse, whereas the remaining uncharged droplets will land on a substrate as printed patterns.…”

Section: Current State Of the Art Of Noncontact Direct Ink Writing Te...mentioning

confidence: 99%

Reviews on Machine Learning Approaches for Process Optimization in Noncontact Direct Ink Writing

Zhang

Moon

2021

ACS Appl. Mater. Interfaces

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Recently, machine learning has gained considerable attention in noncontact direct ink writing because of its novel process modeling and optimization techniques. Unlike conventional fabrication approaches, noncontact direct ink writing is an emerging 3D printing technology for directly fabricating low-cost and customized device applications. Despite possessing many advantages, the achieved electrical performance of produced microelectronics is still limited by the printing quality of the noncontact ink writing process. Therefore, there has been increasing interest in the machine learning for process optimization in the noncontact direct ink writing. Compared with traditional approaches, despite machine learning-based strategies having great potential for efficient process optimization, they are still limited to optimize a specific aspect of the printing process in the noncontact direct ink writing. Therefore, a systematic process optimization approach that integrates the advantages of state-of-the-art machine learning techniques is in demand to fully optimize the overall printing quality. In this paper, we systematically discuss the printing principles, key influencing factors, and main limitations of the noncontact direct ink writing technologies based on inkjet printing (IJP) and aerosol jet printing (AJP). The requirements for process optimization of the noncontact direct ink writing are classified into four main aspects. Then, traditional methods and the state-of-the-art machine learning-based strategies adopted in IJP and AJP for process optimization are reviewed and compared with pros and cons. Finally, to further develop a systematic machine learning approach for the process optimization, we highlight the major limitations, challenges, and future directions of the current machine learning applications.

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“…3D additive manufacturing on the nano-/micro-scale for fabrication of complex architectures is an emerging area today. The ease and use of a wide variety of materials have enabled the development of 3D additive manufacturing techniques and are expected to bring a paradigm shift in fields like nanophotonics, − MEMS/NEMS, − tissue engineering, − optical data storage, , optical tweezing, anticounterfeiting, − biomedical applications, − plasmonics, , and metamaterials − among others. 3D printing techniques based on photopolymerization utilize a mixture of monomers and oligomers, photoinitiators, and ultraviolet–visible and near infrared sources to initiate cross-linking of monomers and oligomers to produce cross-linked polymeric units.…”

Section: Introductionmentioning

confidence: 99%

Additive-Free All-Carbon Composite: A Two-Photon Material System for Nanopatterning of Fluorescent Sub-Wavelength Structures

et al. 2021

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The major bottleneck in fabrication of engineered 3D nanostructures is the choice of materials. Adding functionality to these nanostructures is a daunting task. In order to mitigate these issues, we report a two-photon patternable all carbon material system which can be used to fabricate fluorescent 3D micro/nanostructures using two-photon lithography, with subwavelength resolution. The synthesized material system eliminates the need to use conventional two-photon absorbing materials such as two-photon dyes or two-photon initiators. We have used two different trifunctional acrylate monomers and carbon dots, synthesized hydrothermally from a polyphenolic precursor, to formulate a two-photon processable resin. Upon two-photon excitation, photogenerated electrons in the excited states of the carbon dots facilitate the free radical formation at the surface of the carbon dots. These radicals, upon interaction with vinyl moieties, enable cross-linking of acrylate monomers. Free-radical induced two-photon polymerization of acrylate monomers without any conventional proprietary two-photon absorbing materials was accomplished at an ultrafine subwavelength resolution of 250 nm using 800 nm laser excitation. The effect of critical parameters such as average laser power, carbon dot concentration, and radiation exposure were determined for the fabrication of one-, two-, and three-dimensional functional nanostructures, applicable in a range of domains where fluorescence and toxicity are of the utmost importance. A fabrication speed as high as 100 mm/s was achieved. The ability to fabricate functional 3D micro-/nanostructures is anticipated to instigate a paradigm shift in various areas such as metamaterials, energy storage, drug delivery, and optoelectronics to name a few.

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Drop-on-Demand Electrohydrodynamic Printing of High Resolution Conductive Micro Patterns for MEMS Repairing

Cited by 29 publications

References 26 publications

Plasmonic protein electricity generator

Plasmonic protein electricity generator

Reviews on Machine Learning Approaches for Process Optimization in Noncontact Direct Ink Writing

Additive-Free All-Carbon Composite: A Two-Photon Material System for Nanopatterning of Fluorescent Sub-Wavelength Structures

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