Diamond micro engraving of gravure roller mould for roll-to-roll printing of fine line electronics

Zhang, Xinquan; Liu, Kui; Sunappan, V.; Shan, Xuechuan

doi:10.1016/j.jmatprotec.2015.05.032

Cited by 36 publications

(14 citation statements)

References 10 publications

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“…To overcome this issue, van de Wiel et al have developed a method for embedding high and rough (several micrometers) printed silver structures into substrates by R2R techniques, thereby producing very flat films (surface roughness <5 nm) without sacrificing the high conductivity . Instead of optimizing the printing conditions and ink formulations, Zhang et al have demonstrated that the line width can also be narrowed down in the R2R gravure printing of silver nanoparticle inks at 4 m min −1 by using printing rolls with miniaturized gravure cells (Figure ) . In this case, line widths down to 19 μm and overall transmissions of the PET substrate of above 80% were obtained, although no values for the electrical characteristics of the structures were reported.…”

Section: Printed Circuitry and Electric Connectionsmentioning

confidence: 99%

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Abbel¹,

2018

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The production of electronic devices using solution based ("wet") deposition technologies has some decisive technical and commercial advantages compared to competing approaches like vacuum based ("dry") manufacturing. Particularly, the potential to scale up production processes to large areas and high volumes by introducing continuous roll-to-roll (R2R) methods on flexible substrates has been the topic of intense studies from both applied research institutes and industry already for some years. Decisive steps forward have been achieved during that time, resulting in the dawn of commercial applications for a number of processes, while additional development work is still needed in some other fields. This review summarizes the work published during the last few years on the R2R printing and wet coating of electronic devices. An overview is presented of the basic operational principles for the most commonly used R2R printing and coating methods and techniques for proper web handling in R2R lines. Then, the most commonly used types of flexible substrate materials are introduced, followed by a review of the work published in the application areas of transparent conductor materials, printed electric connections, light emitting devices, photovoltaic energy generation, printed logic, and sensing.

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Section: Printed Circuitry and Electric Connectionsmentioning

confidence: 99%

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Abbel¹,

2018

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“…Zhang et al proposed a novel method called diamond micro engraving to reduce the ink volume transfer read during the machining process. A V-shaped sharp diamond tool, two linear axes and one rotary axis of ultraprecision machine was used to miniaturize the line width to 7 µm [41]. Fig.26: Gravure roller with a specified pattern for metal mesh printing [41].…”

Section: Engraving/patterning For Roll-to-roll Gravure Printingmentioning

confidence: 99%

“…The researchers demonstrated the performance of the DME-machined roller moulds. By replacing the laser-engraved roller with the gravure rollers machined by DME, the line width of printed metal mesh film, which works as a kind of transparent conductive film used in touch screen modules, was reduced from 47 µm to 19 µm, and its transmittance for visible light was increased from 65.2% to 80.4% [41].…”

Section: Engraving/patterning For Roll-to-roll Gravure Printingmentioning

confidence: 99%

Innovations in Micro/Nano Patterning Using Tool-Based Methods

Rahman¹

2016

IIUMEJ

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In recent years, the trend in miniaturization of products has been pervasive in areas such as information technology, biotechnology, and the environmental and medical industries. Micro/Nano patterning is the key supporting technology that has to be developed to meet the challenges posed by the requirements of product miniaturization and the industrial realization of nanotechnology. Micro/Nano patterning techniques can be carried out by techniquesbased on energy beams or solid cuttingtools (tool-based micro-machining). Tool-based micro/nano patterning is a relatively new area; however, over the lasttwo decades, owing to the predominant trend in miniaturization of products, Micro/Nano patterning using tool-based techniques has become a key supportive technology. The energybeam-based patterning process (electron-beam lithography) hassome limitations due to poor control of 3D structures, low material removal rate and low aspect ratio. Moreover, these processes requirespecial facilities, and the maximum achievable thickness is relatively small. Some of theselimitations can be overcome by a tool-based approach using ultra-precision machine tools and solid tools as cutting elements to produce the micro-features with well-controlled shape and tolerances. These Micro/Nano machining-based patterning techniques have been achieved through a paradigm shift in the ideas and processes of conventional machining. In this paper, an attempt has beenmade to present the recent innovations in tool-based micro/nano patterning processes.

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“…The gravure offset is one of the printing techniques used for manufacturing various electronics, such as silver grid transparent electrodes 3 , pressure sensors 4 , and planar inductors 5 , mainly through fine line patterning, because of the following reasons. First, the plate-making process allows for fabricating the gravure printing roll or printing plate with much finer resolution down to several micrometers 6 , 7 , unlike other conventional printing techniques, such as widespread screen printing, which has at least one order of magnitude lower resolution. Second, as gravure offset printing evolved from the so-called pad printing suitable for printing electronics onto nonplanar surfaces, such as electroluminescent displays (ELDs) 8 , 9 and radio-frequency identification (RFID) antennas 10 , it inherited its main feature: the pad-like blanket made of silicone polymer and wrapped around a cylinder.…”

Section: Introductionmentioning

confidence: 99%

AI-assisted reliability assessment for gravure offset printing system

Gafurov

Phung

Kim

et al. 2022

Sci Rep

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In printed electronics, flawless printing quality is crucial for electronic device fabrication. While printing defects may reduce the performance or even cause a failure in the electronic device, there is a challenge in quality evaluation using conventional computer vision tools for printing defect recognition. This study proposed the computer vision approach based on artificial intelligence (AI) and deep convolutional neural networks. First, the data set with printed line images was collected and labeled. Second, the overall printing quality classification model was trained and evaluated using the Grad-CAM visualization technique. Third and last, the pretrained object detection model YOLOv3 was fine-tuned for local printing defect detection. Before fine-tuning, ground truth bounding boxes were analyzed, and anchor box sizes were chosen using the k-means clustering algorithm. The overall printing quality and local defect detection AI models were integrated with the roll-based gravure offset system. This AI approach is also expected to complement more accurate printing reliability analysis firmly.

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Diamond micro engraving of gravure roller mould for roll-to-roll printing of fine line electronics

Cited by 36 publications

References 10 publications

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Innovations in Micro/Nano Patterning Using Tool-Based Methods

AI-assisted reliability assessment for gravure offset printing system

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